/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.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 04:39:08,632 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:39:08,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:39:08,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:39:08,704 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.epf [2021-06-05 04:39:08,730 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:39:08,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:39:08,731 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:39:08,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:39:08,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:39:08,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:39:08,733 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:39:08,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:39:08,733 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:39:08,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:39:08,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:39:08,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:39:08,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:39:08,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:39:08,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:39:08,734 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:39:08,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:39:08,734 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:39:08,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:39:08,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:39:08,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:39:08,735 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:39:08,735 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:39:08,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:39:08,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:39:08,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:39:08,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:39:08,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:39:08,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:39:08,735 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:39:08,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:39:08,735 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:39:08,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:39:08,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:39:08,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:39:08,969 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:39:08,973 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:39:08,974 INFO L432 ainManager$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 04:39:08,974 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 04:39:09,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:39:09,056 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:39:09,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:39:09,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:39:09,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:39:09,066 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 04:39:09" (1/1) ... [2021-06-05 04:39:09,073 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 04:39:09" (1/1) ... [2021-06-05 04:39:09,078 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:39:09,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:39:09,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:39:09,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:39:09,084 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 04:39:09" (1/1) ... [2021-06-05 04:39:09,084 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 04:39:09" (1/1) ... [2021-06-05 04:39:09,086 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 04:39:09" (1/1) ... [2021-06-05 04:39:09,086 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 04:39:09" (1/1) ... [2021-06-05 04:39:09,088 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 04:39:09" (1/1) ... [2021-06-05 04:39:09,090 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 04:39:09" (1/1) ... [2021-06-05 04:39:09,090 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 04:39:09" (1/1) ... [2021-06-05 04:39:09,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:39:09,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:39:09,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:39:09,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:39:09,094 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 04:39:09" (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 04:39:09,138 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:39:09,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:39:09,140 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:39:09,140 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:39:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:39:09,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:39:09,141 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:39:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:39:09,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:39:09,141 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 04:39:09,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 04:39:09,142 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 04:39:09,143 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 04:39:09,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:39:09,499 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 04:39:09,500 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:39:09 BoogieIcfgContainer [2021-06-05 04:39:09,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:39:09,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:39:09,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:39:09,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:39:09,503 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 04:39:09" (1/2) ... [2021-06-05 04:39:09,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb5fc32 and model type name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:39:09, skipping insertion in model container [2021-06-05 04:39:09,503 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 04:39:09" (2/2) ... [2021-06-05 04:39:09,504 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-trans.wvr.bpl [2021-06-05 04:39:09,508 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:39:09,508 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:39:09,508 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:39:09,508 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:39:09,563 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 04:39:09,576 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 04:39:09,588 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:39:09,588 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:39:09,588 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:39:09,588 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:39:09,589 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:39:09,589 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:39:09,589 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:39:09,589 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:39:09,594 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-06-05 04:39:09,605 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 04:39:09,607 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 04:39:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:39:09,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:09,612 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 04:39:09,613 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:09,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:09,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1690757270, now seen corresponding path program 1 times [2021-06-05 04:39:09,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:09,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052115633] [2021-06-05 04:39:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:09,744 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 04:39:09,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:09,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052115633] [2021-06-05 04:39:09,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052115633] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:39:09,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:39:09,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:39:09,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103624648] [2021-06-05 04:39:09,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:39:09,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:09,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:39:09,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:39:09,758 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 04:39:09,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:09,791 INFO L93 Difference]: Finished difference Result 192 states and 551 transitions. [2021-06-05 04:39:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:39:09,792 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 04:39:09,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:09,799 INFO L225 Difference]: With dead ends: 192 [2021-06-05 04:39:09,799 INFO L226 Difference]: Without dead ends: 129 [2021-06-05 04:39:09,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:39:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-06-05 04:39:09,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-06-05 04:39:09,826 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 04:39:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-06-05 04:39:09,828 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-06-05 04:39:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:09,829 INFO L482 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-06-05 04:39:09,829 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 04:39:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-06-05 04:39:09,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:39:09,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:09,830 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 04:39:09,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:39:09,830 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:09,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:09,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1970777821, now seen corresponding path program 1 times [2021-06-05 04:39:09,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:09,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384570334] [2021-06-05 04:39:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:09,918 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 04:39:09,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:09,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384570334] [2021-06-05 04:39:09,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384570334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:09,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843536531] [2021-06-05 04:39:09,919 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 04:39:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:09,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:39:09,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:10,163 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 04:39:10,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843536531] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:39:10,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 04:39:10,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-06-05 04:39:10,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366621985] [2021-06-05 04:39:10,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:39:10,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:10,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:39:10,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:39:10,165 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 04:39:10,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:10,306 INFO L93 Difference]: Finished difference Result 202 states and 574 transitions. [2021-06-05 04:39:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:39:10,307 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 04:39:10,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:10,308 INFO L225 Difference]: With dead ends: 202 [2021-06-05 04:39:10,308 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 04:39:10,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:39:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 04:39:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-06-05 04:39:10,318 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 04:39:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 457 transitions. [2021-06-05 04:39:10,320 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 457 transitions. Word has length 18 [2021-06-05 04:39:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:10,320 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 457 transitions. [2021-06-05 04:39:10,320 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 04:39:10,321 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 457 transitions. [2021-06-05 04:39:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:39:10,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:10,322 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 04:39:10,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 04:39:10,522 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash -92460565, now seen corresponding path program 2 times [2021-06-05 04:39:10,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:10,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77263188] [2021-06-05 04:39:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:10,573 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 04:39:10,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:10,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77263188] [2021-06-05 04:39:10,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77263188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:10,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290544281] [2021-06-05 04:39:10,573 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 04:39:10,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-06-05 04:39:10,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:10,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 04:39:10,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:10,679 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 04:39:10,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290544281] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:39:10,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 04:39:10,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2021-06-05 04:39:10,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159259079] [2021-06-05 04:39:10,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:39:10,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:10,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:39:10,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:39:10,681 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 04:39:10,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:10,733 INFO L93 Difference]: Finished difference Result 252 states and 727 transitions. [2021-06-05 04:39:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:39:10,733 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 04:39:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:10,734 INFO L225 Difference]: With dead ends: 252 [2021-06-05 04:39:10,735 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 04:39:10,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:39:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 04:39:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2021-06-05 04:39:10,742 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 04:39:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-06-05 04:39:10,743 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 18 [2021-06-05 04:39:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:10,743 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-06-05 04:39:10,743 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 04:39:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-06-05 04:39:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:39:10,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:10,744 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 04:39:10,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:10,957 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:10,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:10,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1791011915, now seen corresponding path program 1 times [2021-06-05 04:39:10,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:10,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058894380] [2021-06-05 04:39:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:11,103 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 04:39:11,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:11,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058894380] [2021-06-05 04:39:11,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058894380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:11,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822506139] [2021-06-05 04:39:11,104 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 04:39:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:11,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:39:11,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:11,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:11,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:11,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:11,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:11,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:11,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:11,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:11,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:11,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:11,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:11,470 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-06-05 04:39:11,676 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 04:39:11,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822506139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:11,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:11,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 04:39:11,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635145364] [2021-06-05 04:39:11,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:39:11,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:11,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:39:11,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:39:11,678 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 04:39:12,434 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-06-05 04:39:12,925 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 04:39:13,061 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-06-05 04:39:13,253 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-05 04:39:13,435 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-05 04:39:13,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:13,706 INFO L93 Difference]: Finished difference Result 482 states and 1415 transitions. [2021-06-05 04:39:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:39:13,707 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 04:39:13,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:13,711 INFO L225 Difference]: With dead ends: 482 [2021-06-05 04:39:13,711 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 04:39:13,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1913.3ms TimeCoverageRelationStatistics Valid=269, Invalid=787, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:39:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 04:39:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 204. [2021-06-05 04:39:13,722 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 04:39:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 602 transitions. [2021-06-05 04:39:13,723 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 602 transitions. Word has length 19 [2021-06-05 04:39:13,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:13,723 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 602 transitions. [2021-06-05 04:39:13,723 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 04:39:13,723 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 602 transitions. [2021-06-05 04:39:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:39:13,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:13,724 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 04:39:13,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:13,937 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:13,937 INFO L82 PathProgramCache]: Analyzing trace with hash -730699061, now seen corresponding path program 2 times [2021-06-05 04:39:13,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:13,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567170917] [2021-06-05 04:39:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:14,025 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 04:39:14,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:14,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567170917] [2021-06-05 04:39:14,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567170917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:14,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431968774] [2021-06-05 04:39:14,025 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 04:39:14,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:14,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:14,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:39:14,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:14,208 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 04:39:14,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:14,215 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 04:39:14,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:14,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:14,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:14,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:14,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:14,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:14,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:14,254 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.0 percent of original size [2021-06-05 04:39:14,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:14,265 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:113, output treesize:38 [2021-06-05 04:39:14,355 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 04:39:14,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431968774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:14,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:14,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:39:14,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13806613] [2021-06-05 04:39:14,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:39:14,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:14,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:39:14,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:39:14,357 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 04:39:14,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:14,829 INFO L93 Difference]: Finished difference Result 366 states and 1056 transitions. [2021-06-05 04:39:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:39:14,829 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 04:39:14,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:14,831 INFO L225 Difference]: With dead ends: 366 [2021-06-05 04:39:14,831 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 04:39:14,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 383.7ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:39:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 04:39:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 219. [2021-06-05 04:39:14,847 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 04:39:14,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 657 transitions. [2021-06-05 04:39:14,848 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 657 transitions. Word has length 19 [2021-06-05 04:39:14,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:14,848 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 657 transitions. [2021-06-05 04:39:14,848 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 04:39:14,849 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 657 transitions. [2021-06-05 04:39:14,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:39:14,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:14,850 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 04:39:15,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:15,065 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:15,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1087878037, now seen corresponding path program 3 times [2021-06-05 04:39:15,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:15,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077787297] [2021-06-05 04:39:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:15,144 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 04:39:15,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:15,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077787297] [2021-06-05 04:39:15,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077787297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:15,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245390183] [2021-06-05 04:39:15,145 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 04:39:15,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:39:15,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:15,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:39:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:15,332 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 18 treesize of output 12 [2021-06-05 04:39:15,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:15,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,340 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 11 treesize of output 7 [2021-06-05 04:39:15,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:15,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,349 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 19 treesize of output 13 [2021-06-05 04:39:15,350 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,353 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 5 treesize of output 3 [2021-06-05 04:39:15,354 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,362 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 18 treesize of output 12 [2021-06-05 04:39:15,364 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:15,369 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:15,374 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,377 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 18 treesize of output 12 [2021-06-05 04:39:15,378 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:15,382 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:15,468 INFO L628 ElimStorePlain]: treesize reduction 100, result has 51.7 percent of original size [2021-06-05 04:39:15,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:39:15,481 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:389, output treesize:107 [2021-06-05 04:39:15,669 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 04:39:15,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245390183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:15,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:15,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:39:15,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340690891] [2021-06-05 04:39:15,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:39:15,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:39:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:39:15,671 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 04:39:16,055 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-06-05 04:39:16,333 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-06-05 04:39:16,477 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 04:39:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:16,550 INFO L93 Difference]: Finished difference Result 477 states and 1330 transitions. [2021-06-05 04:39:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:39:16,550 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 04:39:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:16,552 INFO L225 Difference]: With dead ends: 477 [2021-06-05 04:39:16,552 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 04:39:16,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 845.7ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:39:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 04:39:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 224. [2021-06-05 04:39:16,558 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 04:39:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 682 transitions. [2021-06-05 04:39:16,559 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 682 transitions. Word has length 19 [2021-06-05 04:39:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:16,559 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 682 transitions. [2021-06-05 04:39:16,559 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 04:39:16,559 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 682 transitions. [2021-06-05 04:39:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:39:16,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:16,560 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 04:39:16,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 04:39:16,777 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:16,778 INFO L82 PathProgramCache]: Analyzing trace with hash 27099947, now seen corresponding path program 4 times [2021-06-05 04:39:16,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:16,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821432835] [2021-06-05 04:39:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:16,880 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 04:39:16,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:16,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821432835] [2021-06-05 04:39:16,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821432835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:16,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508838531] [2021-06-05 04:39:16,881 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 04:39:16,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:16,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:16,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:39:16,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:17,037 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 18 treesize of output 12 [2021-06-05 04:39:17,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:17,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:17,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:17,045 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 04:39:17,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:17,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:17,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:17,053 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 19 treesize of output 13 [2021-06-05 04:39:17,054 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:17,057 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 12 treesize of output 8 [2021-06-05 04:39:17,058 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:17,061 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 11 treesize of output 7 [2021-06-05 04:39:17,063 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:17,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:17,068 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:17,127 INFO L628 ElimStorePlain]: treesize reduction 67, result has 54.1 percent of original size [2021-06-05 04:39:17,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:39:17,128 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:257, output treesize:79 [2021-06-05 04:39:17,276 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 04:39:17,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508838531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:17,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:17,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:39:17,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248943268] [2021-06-05 04:39:17,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:17,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:17,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:17,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:17,277 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 04:39:17,900 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-05 04:39:17,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:17,998 INFO L93 Difference]: Finished difference Result 454 states and 1282 transitions. [2021-06-05 04:39:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:39:17,999 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 04:39:17,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:18,000 INFO L225 Difference]: With dead ends: 454 [2021-06-05 04:39:18,001 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 04:39:18,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 724.1ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:39:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 04:39:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 229. [2021-06-05 04:39:18,006 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 04:39:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 702 transitions. [2021-06-05 04:39:18,007 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 702 transitions. Word has length 19 [2021-06-05 04:39:18,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:18,007 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 702 transitions. [2021-06-05 04:39:18,007 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 04:39:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 702 transitions. [2021-06-05 04:39:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:39:18,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:18,008 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 04:39:18,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:18,221 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:18,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1446987595, now seen corresponding path program 5 times [2021-06-05 04:39:18,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:18,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149945505] [2021-06-05 04:39:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:18,308 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 04:39:18,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:18,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149945505] [2021-06-05 04:39:18,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149945505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:18,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462940595] [2021-06-05 04:39:18,308 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 04:39:18,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:18,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:18,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:39:18,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:18,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:18,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:18,499 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:18,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:18,502 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 13 treesize of output 9 [2021-06-05 04:39:18,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:18,505 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 04:39:18,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:18,510 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 11 treesize of output 7 [2021-06-05 04:39:18,511 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:18,529 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-06-05 04:39:18,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:39:18,530 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-06-05 04:39:18,594 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 04:39:18,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462940595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:18,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:18,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 04:39:18,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818266481] [2021-06-05 04:39:18,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:18,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:18,595 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 04:39:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:19,279 INFO L93 Difference]: Finished difference Result 471 states and 1333 transitions. [2021-06-05 04:39:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:39:19,279 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 04:39:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:19,280 INFO L225 Difference]: With dead ends: 471 [2021-06-05 04:39:19,280 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 04:39:19,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 639.2ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:19,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 04:39:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 249. [2021-06-05 04:39:19,285 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 04:39:19,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 767 transitions. [2021-06-05 04:39:19,286 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 767 transitions. Word has length 19 [2021-06-05 04:39:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:19,286 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 767 transitions. [2021-06-05 04:39:19,286 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 04:39:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 767 transitions. [2021-06-05 04:39:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:39:19,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:19,287 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 04:39:19,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:19,501 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:19,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1407466373, now seen corresponding path program 6 times [2021-06-05 04:39:19,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:19,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391073195] [2021-06-05 04:39:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:19,581 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 04:39:19,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:19,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391073195] [2021-06-05 04:39:19,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391073195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:19,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073849882] [2021-06-05 04:39:19,582 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 04:39:19,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:39:19,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:19,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:39:19,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:19,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:19,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:19,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:19,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:19,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:19,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:19,758 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 12 treesize of output 8 [2021-06-05 04:39:19,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:19,761 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 5 treesize of output 3 [2021-06-05 04:39:19,762 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:19,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:19,765 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:19,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:19,768 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:19,796 INFO L628 ElimStorePlain]: treesize reduction 32, result has 54.3 percent of original size [2021-06-05 04:39:19,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:19,797 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:167, output treesize:38 [2021-06-05 04:39:19,858 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 04:39:19,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073849882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:19,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:19,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:39:19,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815272434] [2021-06-05 04:39:19,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:19,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:19,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:19,859 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 04:39:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:20,324 INFO L93 Difference]: Finished difference Result 349 states and 1061 transitions. [2021-06-05 04:39:20,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:39:20,324 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 04:39:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:20,325 INFO L225 Difference]: With dead ends: 349 [2021-06-05 04:39:20,326 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 04:39:20,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:20,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 04:39:20,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 254. [2021-06-05 04:39:20,330 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 04:39:20,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 787 transitions. [2021-06-05 04:39:20,331 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 787 transitions. Word has length 19 [2021-06-05 04:39:20,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:20,331 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 787 transitions. [2021-06-05 04:39:20,331 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 04:39:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 787 transitions. [2021-06-05 04:39:20,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:39:20,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:20,332 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 04:39:20,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 04:39:20,548 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1068923825, now seen corresponding path program 7 times [2021-06-05 04:39:20,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:20,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717658278] [2021-06-05 04:39:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:20,614 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 04:39:20,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:20,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717658278] [2021-06-05 04:39:20,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717658278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:20,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348659808] [2021-06-05 04:39:20,615 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 04:39:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:20,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:39:20,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:20,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:20,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:20,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:20,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:20,753 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 19 treesize of output 13 [2021-06-05 04:39:20,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:20,758 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 12 treesize of output 8 [2021-06-05 04:39:20,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:20,761 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:20,762 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:20,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:20,765 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:20,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:20,768 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:20,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:20,772 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:20,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:20,784 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:20,786 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 17 treesize of output 11 [2021-06-05 04:39:20,787 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:20,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:20,790 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:20,792 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 11 treesize of output 7 [2021-06-05 04:39:20,793 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:20,842 INFO L628 ElimStorePlain]: treesize reduction 48, result has 59.3 percent of original size [2021-06-05 04:39:20,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:39:20,843 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:409, output treesize:70 [2021-06-05 04:39:21,000 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 04:39:21,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348659808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:21,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:21,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 04:39:21,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369362934] [2021-06-05 04:39:21,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:39:21,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:21,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:39:21,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:39:21,002 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 04:39:21,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:21,933 INFO L93 Difference]: Finished difference Result 515 states and 1500 transitions. [2021-06-05 04:39:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:39:21,933 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 04:39:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:21,935 INFO L225 Difference]: With dead ends: 515 [2021-06-05 04:39:21,935 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 04:39:21,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 884.4ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:39:21,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 04:39:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 269. [2021-06-05 04:39:21,940 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 04:39:21,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 857 transitions. [2021-06-05 04:39:21,941 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 857 transitions. Word has length 19 [2021-06-05 04:39:21,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:21,941 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 857 transitions. [2021-06-05 04:39:21,941 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 04:39:21,942 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 857 transitions. [2021-06-05 04:39:21,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:39:21,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:21,942 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 04:39:22,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:22,153 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:22,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:22,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2129701915, now seen corresponding path program 8 times [2021-06-05 04:39:22,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:22,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464244664] [2021-06-05 04:39:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:22,243 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 04:39:22,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:22,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464244664] [2021-06-05 04:39:22,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464244664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:22,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99210839] [2021-06-05 04:39:22,244 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 04:39:22,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:22,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:22,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:39:22,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:22,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:22,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:22,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:22,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:22,395 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 18 treesize of output 12 [2021-06-05 04:39:22,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:22,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:22,400 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:22,403 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 04:39:22,404 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:22,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:22,407 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:22,410 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 19 treesize of output 13 [2021-06-05 04:39:22,411 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:22,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:22,414 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:22,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:22,418 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:22,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:22,421 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:22,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:22,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:22,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:22,428 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:22,493 INFO L628 ElimStorePlain]: treesize reduction 110, result has 42.1 percent of original size [2021-06-05 04:39:22,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:39:22,494 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:386, output treesize:80 [2021-06-05 04:39:22,724 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 04:39:22,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99210839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:22,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:22,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-06-05 04:39:22,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375158112] [2021-06-05 04:39:22,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:22,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:22,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:22,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:22,726 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 04:39:22,992 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-06-05 04:39:23,170 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-06-05 04:39:23,399 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-05 04:39:23,541 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-06-05 04:39:23,713 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 04:39:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:23,720 INFO L93 Difference]: Finished difference Result 540 states and 1578 transitions. [2021-06-05 04:39:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:39:23,721 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 04:39:23,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:23,723 INFO L225 Difference]: With dead ends: 540 [2021-06-05 04:39:23,723 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 04:39:23,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 994.3ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:39:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 04:39:23,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 274. [2021-06-05 04:39:23,731 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 04:39:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 877 transitions. [2021-06-05 04:39:23,731 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 877 transitions. Word has length 19 [2021-06-05 04:39:23,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:23,731 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 877 transitions. [2021-06-05 04:39:23,732 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 04:39:23,732 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 877 transitions. [2021-06-05 04:39:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:39:23,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:23,733 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 04:39:23,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:23,948 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:23,948 INFO L82 PathProgramCache]: Analyzing trace with hash -709814267, now seen corresponding path program 9 times [2021-06-05 04:39:23,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:23,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131929518] [2021-06-05 04:39:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:24,004 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 04:39:24,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:24,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131929518] [2021-06-05 04:39:24,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131929518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:24,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754755761] [2021-06-05 04:39:24,005 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 04:39:24,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:39:24,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:24,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:39:24,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:24,206 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 5 treesize of output 3 [2021-06-05 04:39:24,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:24,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:24,214 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,217 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 19 treesize of output 13 [2021-06-05 04:39:24,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,220 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 12 treesize of output 8 [2021-06-05 04:39:24,221 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:24,224 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:24,227 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:24,230 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,232 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 19 treesize of output 13 [2021-06-05 04:39:24,233 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,236 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 18 treesize of output 12 [2021-06-05 04:39:24,237 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:24,239 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,242 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 11 treesize of output 7 [2021-06-05 04:39:24,243 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:24,245 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:24,290 INFO L628 ElimStorePlain]: treesize reduction 54, result has 51.8 percent of original size [2021-06-05 04:39:24,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:39:24,291 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:382, output treesize:58 [2021-06-05 04:39:24,413 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 04:39:24,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754755761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:24,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:24,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 14 [2021-06-05 04:39:24,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960792642] [2021-06-05 04:39:24,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:24,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:24,415 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 04:39:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:25,099 INFO L93 Difference]: Finished difference Result 434 states and 1279 transitions. [2021-06-05 04:39:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:39:25,100 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 04:39:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:25,101 INFO L225 Difference]: With dead ends: 434 [2021-06-05 04:39:25,101 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 04:39:25,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 606.6ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:39:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 04:39:25,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 274. [2021-06-05 04:39:25,106 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 04:39:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 872 transitions. [2021-06-05 04:39:25,107 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 872 transitions. Word has length 19 [2021-06-05 04:39:25,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:25,107 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 872 transitions. [2021-06-05 04:39:25,107 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 04:39:25,107 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 872 transitions. [2021-06-05 04:39:25,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:39:25,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:25,108 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 04:39:25,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:25,321 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1359026097, now seen corresponding path program 10 times [2021-06-05 04:39:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296329003] [2021-06-05 04:39:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:25,411 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 04:39:25,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:25,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296329003] [2021-06-05 04:39:25,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296329003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:25,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914028759] [2021-06-05 04:39:25,411 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 04:39:25,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:25,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:25,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:39:25,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:25,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:25,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,578 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 18 treesize of output 12 [2021-06-05 04:39:25,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,582 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 04:39:25,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:25,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:25,591 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,594 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 19 treesize of output 13 [2021-06-05 04:39:25,595 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,598 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 19 treesize of output 13 [2021-06-05 04:39:25,598 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:25,602 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,604 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 04:39:25,605 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:25,607 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,610 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 04:39:25,610 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:25,677 INFO L628 ElimStorePlain]: treesize reduction 100, result has 44.1 percent of original size [2021-06-05 04:39:25,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:39:25,678 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:384, output treesize:79 [2021-06-05 04:39:25,898 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 04:39:25,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914028759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:25,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:25,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 04:39:25,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822570100] [2021-06-05 04:39:25,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:39:25,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:25,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:39:25,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:39:25,899 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 04:39:26,241 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 04:39:26,494 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-05 04:39:26,768 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 04:39:26,923 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 04:39:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:26,957 INFO L93 Difference]: Finished difference Result 634 states and 1845 transitions. [2021-06-05 04:39:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:39:26,957 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 04:39:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:26,959 INFO L225 Difference]: With dead ends: 634 [2021-06-05 04:39:26,959 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 04:39:26,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1068.8ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:39:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 04:39:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 284. [2021-06-05 04:39:26,965 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 04:39:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 912 transitions. [2021-06-05 04:39:26,966 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 912 transitions. Word has length 19 [2021-06-05 04:39:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:26,966 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 912 transitions. [2021-06-05 04:39:26,966 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 04:39:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 912 transitions. [2021-06-05 04:39:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:39:26,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:26,967 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 04:39:27,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:27,183 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:27,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:27,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1516053551, now seen corresponding path program 11 times [2021-06-05 04:39:27,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:27,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235814081] [2021-06-05 04:39:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:27,262 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 04:39:27,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:27,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235814081] [2021-06-05 04:39:27,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235814081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:27,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747381562] [2021-06-05 04:39:27,263 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 04:39:27,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:27,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:39:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:27,440 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 12 treesize of output 8 [2021-06-05 04:39:27,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:27,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:27,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:27,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:27,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:27,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:27,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:27,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:27,452 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:27,482 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.0 percent of original size [2021-06-05 04:39:27,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:27,483 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:133, output treesize:49 [2021-06-05 04:39:27,546 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 04:39:27,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747381562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:27,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:27,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:39:27,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388472007] [2021-06-05 04:39:27,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:27,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:27,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:27,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:27,548 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 04:39:28,275 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 04:39:28,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:28,344 INFO L93 Difference]: Finished difference Result 612 states and 1763 transitions. [2021-06-05 04:39:28,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:39:28,344 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 04:39:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:28,346 INFO L225 Difference]: With dead ends: 612 [2021-06-05 04:39:28,346 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 04:39:28,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 761.1ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:39:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 04:39:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 294. [2021-06-05 04:39:28,352 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 04:39:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 952 transitions. [2021-06-05 04:39:28,352 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 952 transitions. Word has length 19 [2021-06-05 04:39:28,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:28,353 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 952 transitions. [2021-06-05 04:39:28,353 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 04:39:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 952 transitions. [2021-06-05 04:39:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:39:28,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:28,353 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 04:39:28,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 04:39:28,569 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:28,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1718135655, now seen corresponding path program 12 times [2021-06-05 04:39:28,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:28,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815843707] [2021-06-05 04:39:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:28,620 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 04:39:28,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:28,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815843707] [2021-06-05 04:39:28,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815843707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:28,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220649023] [2021-06-05 04:39:28,620 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 04:39:28,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:39:28,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:28,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:39:28,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:28,819 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 04:39:28,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:28,822 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 19 treesize of output 13 [2021-06-05 04:39:28,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:28,825 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 18 treesize of output 12 [2021-06-05 04:39:28,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:28,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:28,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:28,831 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 12 treesize of output 8 [2021-06-05 04:39:28,831 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:28,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:28,835 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:28,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:28,837 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:28,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:28,840 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:28,874 INFO L628 ElimStorePlain]: treesize reduction 3, result has 95.1 percent of original size [2021-06-05 04:39:28,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:39:28,875 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:231, output treesize:58 [2021-06-05 04:39:28,991 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 04:39:28,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220649023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:28,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:28,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 04:39:28,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656633829] [2021-06-05 04:39:28,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:39:28,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:28,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:39:28,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:39:28,992 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 04:39:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:29,955 INFO L93 Difference]: Finished difference Result 533 states and 1561 transitions. [2021-06-05 04:39:29,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:39:29,955 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 04:39:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:29,957 INFO L225 Difference]: With dead ends: 533 [2021-06-05 04:39:29,957 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 04:39:29,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 862.7ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:39:29,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 04:39:29,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 294. [2021-06-05 04:39:29,961 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 04:39:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 947 transitions. [2021-06-05 04:39:29,962 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 947 transitions. Word has length 19 [2021-06-05 04:39:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:29,962 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 947 transitions. [2021-06-05 04:39:29,962 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 04:39:29,962 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 947 transitions. [2021-06-05 04:39:29,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:29,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:29,963 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:30,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:30,177 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:30,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1346948354, now seen corresponding path program 13 times [2021-06-05 04:39:30,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:30,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199873309] [2021-06-05 04:39:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:30,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:30,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199873309] [2021-06-05 04:39:30,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199873309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:30,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923847521] [2021-06-05 04:39:30,238 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 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 04:39:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:30,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:30,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:30,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:30,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:30,331 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 04:39:30,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:30,347 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:39:30,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:39:30,348 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:39:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:30,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923847521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:30,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:30,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:39:30,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786003318] [2021-06-05 04:39:30,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:30,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:30,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:30,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:30,385 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 04:39:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:30,578 INFO L93 Difference]: Finished difference Result 486 states and 1487 transitions. [2021-06-05 04:39:30,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:30,578 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 04:39:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:30,580 INFO L225 Difference]: With dead ends: 486 [2021-06-05 04:39:30,580 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 04:39:30,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:39:30,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 04:39:30,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 283. [2021-06-05 04:39:30,586 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 04:39:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 927 transitions. [2021-06-05 04:39:30,587 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 927 transitions. Word has length 20 [2021-06-05 04:39:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:30,587 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 927 transitions. [2021-06-05 04:39:30,587 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 04:39:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 927 transitions. [2021-06-05 04:39:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:30,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:30,587 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 04:39:30,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 04:39:30,804 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:30,804 INFO L82 PathProgramCache]: Analyzing trace with hash 513236125, now seen corresponding path program 14 times [2021-06-05 04:39:30,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:30,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842149657] [2021-06-05 04:39:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:30,852 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 04:39:30,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:30,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842149657] [2021-06-05 04:39:30,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842149657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:30,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110480449] [2021-06-05 04:39:30,852 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 04:39:30,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:30,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:30,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:30,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:30,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:30,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:30,947 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 12 treesize of output 8 [2021-06-05 04:39:30,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:30,954 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 04:39:30,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:39:30,954 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 04:39:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:30,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110480449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:30,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:30,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:39:30,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453314354] [2021-06-05 04:39:30,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:39:30,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:30,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:39:30,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:39:30,965 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 04:39:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:31,168 INFO L93 Difference]: Finished difference Result 488 states and 1470 transitions. [2021-06-05 04:39:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:31,168 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 04:39:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:31,170 INFO L225 Difference]: With dead ends: 488 [2021-06-05 04:39:31,170 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 04:39:31,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:39:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 04:39:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 326. [2021-06-05 04:39:31,175 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 04:39:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1036 transitions. [2021-06-05 04:39:31,176 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1036 transitions. Word has length 20 [2021-06-05 04:39:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:31,176 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 1036 transitions. [2021-06-05 04:39:31,176 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 04:39:31,176 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1036 transitions. [2021-06-05 04:39:31,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:31,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:31,176 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:31,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:31,391 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:31,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:31,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1671879655, now seen corresponding path program 15 times [2021-06-05 04:39:31,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:31,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827764137] [2021-06-05 04:39:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:31,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827764137] [2021-06-05 04:39:31,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827764137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759682852] [2021-06-05 04:39:31,442 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 04:39:31,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:39:31,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:31,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:31,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:31,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:31,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:31,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:31,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:31,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:39:31,565 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-06-05 04:39:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:31,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759682852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:31,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:31,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:39:31,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673161718] [2021-06-05 04:39:31,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:39:31,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:31,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:39:31,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:39:31,590 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 04:39:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:31,804 INFO L93 Difference]: Finished difference Result 540 states and 1591 transitions. [2021-06-05 04:39:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:31,805 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 04:39:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:31,806 INFO L225 Difference]: With dead ends: 540 [2021-06-05 04:39:31,806 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 04:39:31,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:39:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 04:39:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 329. [2021-06-05 04:39:31,817 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 04:39:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1047 transitions. [2021-06-05 04:39:31,817 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1047 transitions. Word has length 20 [2021-06-05 04:39:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:31,817 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1047 transitions. [2021-06-05 04:39:31,818 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 04:39:31,818 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1047 transitions. [2021-06-05 04:39:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:31,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:31,819 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:32,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 04:39:32,033 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:32,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:32,033 INFO L82 PathProgramCache]: Analyzing trace with hash 177971933, now seen corresponding path program 16 times [2021-06-05 04:39:32,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:32,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705211925] [2021-06-05 04:39:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:32,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:32,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705211925] [2021-06-05 04:39:32,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705211925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:32,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802856234] [2021-06-05 04:39:32,083 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 04:39:32,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:32,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:32,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:32,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:32,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:32,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:32,184 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 04:39:32,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:39:32,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 04:39:32,205 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 04:39:32,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802856234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:32,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:32,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:39:32,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321978163] [2021-06-05 04:39:32,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:39:32,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:32,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:39:32,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:39:32,206 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 04:39:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:32,410 INFO L93 Difference]: Finished difference Result 497 states and 1488 transitions. [2021-06-05 04:39:32,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:32,411 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 04:39:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:32,412 INFO L225 Difference]: With dead ends: 497 [2021-06-05 04:39:32,412 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 04:39:32,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:39:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 04:39:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 329. [2021-06-05 04:39:32,417 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 04:39:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1044 transitions. [2021-06-05 04:39:32,418 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1044 transitions. Word has length 20 [2021-06-05 04:39:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:32,418 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1044 transitions. [2021-06-05 04:39:32,418 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 04:39:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1044 transitions. [2021-06-05 04:39:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:32,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:32,419 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:32,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-06-05 04:39:32,635 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1528996053, now seen corresponding path program 17 times [2021-06-05 04:39:32,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:32,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512015011] [2021-06-05 04:39:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:32,684 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 04:39:32,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:32,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512015011] [2021-06-05 04:39:32,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512015011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:32,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810866787] [2021-06-05 04:39:32,684 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 04:39:32,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:32,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:32,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:32,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:32,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810866787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:32,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:32,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:39:32,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464977733] [2021-06-05 04:39:32,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:32,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:32,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:32,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:32,834 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 04:39:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:33,053 INFO L93 Difference]: Finished difference Result 500 states and 1492 transitions. [2021-06-05 04:39:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:33,054 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 04:39:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:33,055 INFO L225 Difference]: With dead ends: 500 [2021-06-05 04:39:33,055 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 04:39:33,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:33,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 04:39:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 335. [2021-06-05 04:39:33,062 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 04:39:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1066 transitions. [2021-06-05 04:39:33,062 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1066 transitions. Word has length 20 [2021-06-05 04:39:33,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:33,062 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1066 transitions. [2021-06-05 04:39:33,063 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 04:39:33,063 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1066 transitions. [2021-06-05 04:39:33,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:33,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:33,064 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 04:39:33,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 04:39:33,277 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:33,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1272063521, now seen corresponding path program 18 times [2021-06-05 04:39:33,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:33,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361634894] [2021-06-05 04:39:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:33,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:33,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361634894] [2021-06-05 04:39:33,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361634894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:33,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683588825] [2021-06-05 04:39:33,328 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 04:39:33,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:39:33,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:33,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:33,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:33,481 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 04:39:33,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683588825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:33,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:33,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:39:33,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243211517] [2021-06-05 04:39:33,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:33,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:33,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:33,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:33,484 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 04:39:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:33,793 INFO L93 Difference]: Finished difference Result 506 states and 1499 transitions. [2021-06-05 04:39:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:39:33,793 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 04:39:33,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:33,795 INFO L225 Difference]: With dead ends: 506 [2021-06-05 04:39:33,795 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 04:39:33,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:39:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 04:39:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 332. [2021-06-05 04:39:33,800 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 04:39:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1055 transitions. [2021-06-05 04:39:33,801 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1055 transitions. Word has length 20 [2021-06-05 04:39:33,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:33,801 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1055 transitions. [2021-06-05 04:39:33,801 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 04:39:33,801 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1055 transitions. [2021-06-05 04:39:33,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:33,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:33,802 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:34,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 04:39:34,018 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1809919099, now seen corresponding path program 19 times [2021-06-05 04:39:34,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:34,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473097674] [2021-06-05 04:39:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:34,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:34,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473097674] [2021-06-05 04:39:34,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473097674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:34,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049484046] [2021-06-05 04:39:34,071 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 04:39:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:34,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:34,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049484046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:34,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:34,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:39:34,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189863161] [2021-06-05 04:39:34,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:34,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:34,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:34,235 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 04:39:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:34,498 INFO L93 Difference]: Finished difference Result 464 states and 1404 transitions. [2021-06-05 04:39:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:34,498 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 04:39:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:34,500 INFO L225 Difference]: With dead ends: 464 [2021-06-05 04:39:34,500 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 04:39:34,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 04:39:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 332. [2021-06-05 04:39:34,505 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 04:39:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1052 transitions. [2021-06-05 04:39:34,506 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1052 transitions. Word has length 20 [2021-06-05 04:39:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:34,506 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1052 transitions. [2021-06-05 04:39:34,506 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 04:39:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1052 transitions. [2021-06-05 04:39:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:34,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:34,507 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:34,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:34,723 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:34,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1880172963, now seen corresponding path program 20 times [2021-06-05 04:39:34,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:34,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968416370] [2021-06-05 04:39:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:34,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:34,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968416370] [2021-06-05 04:39:34,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968416370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:34,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549641765] [2021-06-05 04:39:34,778 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 04:39:34,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:34,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:34,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:34,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:34,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549641765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:34,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:34,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:39:34,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055336214] [2021-06-05 04:39:34,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:34,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:34,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:34,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:34,935 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 04:39:35,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:35,235 INFO L93 Difference]: Finished difference Result 554 states and 1629 transitions. [2021-06-05 04:39:35,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:35,235 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 04:39:35,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:35,237 INFO L225 Difference]: With dead ends: 554 [2021-06-05 04:39:35,237 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 04:39:35,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 312.2ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 04:39:35,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 341. [2021-06-05 04:39:35,243 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 04:39:35,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1085 transitions. [2021-06-05 04:39:35,244 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1085 transitions. Word has length 20 [2021-06-05 04:39:35,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:35,245 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1085 transitions. [2021-06-05 04:39:35,245 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 04:39:35,245 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1085 transitions. [2021-06-05 04:39:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:35,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:35,246 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 04:39:35,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:35,460 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:35,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:35,460 INFO L82 PathProgramCache]: Analyzing trace with hash 386265241, now seen corresponding path program 21 times [2021-06-05 04:39:35,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:35,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058613154] [2021-06-05 04:39:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:35,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:35,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058613154] [2021-06-05 04:39:35,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058613154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:35,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880925203] [2021-06-05 04:39:35,520 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 04:39:35,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:39:35,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:35,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:35,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:35,660 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 04:39:35,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880925203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:35,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:35,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:39:35,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519219403] [2021-06-05 04:39:35,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:35,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:35,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:35,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:35,661 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 04:39:36,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:36,004 INFO L93 Difference]: Finished difference Result 560 states and 1636 transitions. [2021-06-05 04:39:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:39:36,004 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 04:39:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:36,006 INFO L225 Difference]: With dead ends: 560 [2021-06-05 04:39:36,006 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 04:39:36,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:39:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 04:39:36,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 338. [2021-06-05 04:39:36,011 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 04:39:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1074 transitions. [2021-06-05 04:39:36,012 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1074 transitions. Word has length 20 [2021-06-05 04:39:36,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:36,012 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1074 transitions. [2021-06-05 04:39:36,012 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 04:39:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1074 transitions. [2021-06-05 04:39:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:36,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:36,013 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:36,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 04:39:36,228 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:36,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:36,229 INFO L82 PathProgramCache]: Analyzing trace with hash 924120819, now seen corresponding path program 22 times [2021-06-05 04:39:36,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:36,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056435704] [2021-06-05 04:39:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:36,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:36,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056435704] [2021-06-05 04:39:36,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056435704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:36,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362635713] [2021-06-05 04:39:36,286 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 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 04:39:36,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:36,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:36,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:36,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:36,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362635713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:36,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:36,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:39:36,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345067204] [2021-06-05 04:39:36,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:36,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:36,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:36,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:36,443 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 04:39:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:36,754 INFO L93 Difference]: Finished difference Result 524 states and 1554 transitions. [2021-06-05 04:39:36,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:36,754 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 04:39:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:36,756 INFO L225 Difference]: With dead ends: 524 [2021-06-05 04:39:36,756 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 04:39:36,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:36,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 04:39:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 335. [2021-06-05 04:39:36,770 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 04:39:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1063 transitions. [2021-06-05 04:39:36,771 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1063 transitions. Word has length 20 [2021-06-05 04:39:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:36,771 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1063 transitions. [2021-06-05 04:39:36,772 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 04:39:36,772 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1063 transitions. [2021-06-05 04:39:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:36,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:36,772 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 04:39:36,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:36,987 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:36,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1511866141, now seen corresponding path program 23 times [2021-06-05 04:39:36,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:36,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309325815] [2021-06-05 04:39:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:37,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:37,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309325815] [2021-06-05 04:39:37,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309325815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:37,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919773183] [2021-06-05 04:39:37,044 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 04:39:37,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:37,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:37,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:37,160 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 04:39:37,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919773183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:37,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:37,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:39:37,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249355608] [2021-06-05 04:39:37,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:39:37,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:39:37,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:39:37,161 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 04:39:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:37,429 INFO L93 Difference]: Finished difference Result 515 states and 1530 transitions. [2021-06-05 04:39:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:37,430 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 04:39:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:37,431 INFO L225 Difference]: With dead ends: 515 [2021-06-05 04:39:37,431 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 04:39:37,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 254.1ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:39:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 04:39:37,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 335. [2021-06-05 04:39:37,436 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 04:39:37,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-06-05 04:39:37,437 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-06-05 04:39:37,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:37,437 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-06-05 04:39:37,437 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 04:39:37,437 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-06-05 04:39:37,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:37,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:37,437 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:37,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-06-05 04:39:37,645 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:37,645 INFO L82 PathProgramCache]: Analyzing trace with hash 426307966, now seen corresponding path program 24 times [2021-06-05 04:39:37,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:37,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452825934] [2021-06-05 04:39:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:37,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:37,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452825934] [2021-06-05 04:39:37,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452825934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:37,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097129825] [2021-06-05 04:39:37,688 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 04:39:37,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:39:37,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:37,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:37,782 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 04:39:37,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:37,785 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 04:39:37,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:37,798 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:39:37,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:39:37,798 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:39:37,836 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 04:39:37,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097129825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:37,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:37,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:39:37,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573245464] [2021-06-05 04:39:37,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:37,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:37,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:37,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:37,838 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 04:39:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:38,073 INFO L93 Difference]: Finished difference Result 487 states and 1495 transitions. [2021-06-05 04:39:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:38,073 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 04:39:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:38,075 INFO L225 Difference]: With dead ends: 487 [2021-06-05 04:39:38,075 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 04:39:38,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:39:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 04:39:38,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 335. [2021-06-05 04:39:38,079 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 04:39:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-06-05 04:39:38,080 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-06-05 04:39:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:38,080 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-06-05 04:39:38,080 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 04:39:38,080 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-06-05 04:39:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:38,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:38,081 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 04:39:38,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:38,297 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:38,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1652166947, now seen corresponding path program 25 times [2021-06-05 04:39:38,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:38,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599769953] [2021-06-05 04:39:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:38,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:38,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599769953] [2021-06-05 04:39:38,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599769953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:38,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155260301] [2021-06-05 04:39:38,361 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 04:39:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:38,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:38,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:38,489 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 04:39:38,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:38,497 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 04:39:38,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:39:38,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 04:39:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:38,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155260301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:38,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:38,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:39:38,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311148981] [2021-06-05 04:39:38,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:38,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:38,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:38,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:38,517 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 04:39:38,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:38,720 INFO L93 Difference]: Finished difference Result 542 states and 1611 transitions. [2021-06-05 04:39:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:38,720 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 04:39:38,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:38,722 INFO L225 Difference]: With dead ends: 542 [2021-06-05 04:39:38,722 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 04:39:38,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:39:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 04:39:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 345. [2021-06-05 04:39:38,727 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 04:39:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1086 transitions. [2021-06-05 04:39:38,727 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1086 transitions. Word has length 20 [2021-06-05 04:39:38,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:38,728 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1086 transitions. [2021-06-05 04:39:38,728 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 04:39:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1086 transitions. [2021-06-05 04:39:38,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:38,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:38,728 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:38,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 04:39:38,944 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:38,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:38,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1484156819, now seen corresponding path program 26 times [2021-06-05 04:39:38,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:38,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044244830] [2021-06-05 04:39:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:38,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:38,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044244830] [2021-06-05 04:39:38,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044244830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:38,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269314643] [2021-06-05 04:39:38,999 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 04:39:39,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:39,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:39,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:39,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:39,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:39,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:39,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:39,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:39,135 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 04:39:39,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:39:39,136 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 04:39:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:39,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269314643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:39,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:39,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:39:39,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465659619] [2021-06-05 04:39:39,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:39,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:39,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:39,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:39,163 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 04:39:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:39,369 INFO L93 Difference]: Finished difference Result 594 states and 1732 transitions. [2021-06-05 04:39:39,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:39,369 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 04:39:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:39,371 INFO L225 Difference]: With dead ends: 594 [2021-06-05 04:39:39,371 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 04:39:39,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:39:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 04:39:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 348. [2021-06-05 04:39:39,376 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 04:39:39,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1097 transitions. [2021-06-05 04:39:39,377 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1097 transitions. Word has length 20 [2021-06-05 04:39:39,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:39,377 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1097 transitions. [2021-06-05 04:39:39,377 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 04:39:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1097 transitions. [2021-06-05 04:39:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:39,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:39,377 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 04:39:39,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:39,589 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:39,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1316902755, now seen corresponding path program 27 times [2021-06-05 04:39:39,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:39,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89055811] [2021-06-05 04:39:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:39,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:39,642 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 04:39:39,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:39,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89055811] [2021-06-05 04:39:39,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89055811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:39,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611867024] [2021-06-05 04:39:39,642 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 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 04:39:39,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:39:39,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:39,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:39,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:39,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:39,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:39,756 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 12 treesize of output 8 [2021-06-05 04:39:39,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:39,763 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 04:39:39,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:39:39,764 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 04:39:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:39,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611867024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:39,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:39,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:39:39,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082442488] [2021-06-05 04:39:39,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:39,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:39,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:39,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:39,786 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 04:39:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:39,951 INFO L93 Difference]: Finished difference Result 551 states and 1629 transitions. [2021-06-05 04:39:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:39,952 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 04:39:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:39,953 INFO L225 Difference]: With dead ends: 551 [2021-06-05 04:39:39,953 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 04:39:39,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:39:39,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 04:39:39,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 340. [2021-06-05 04:39:39,958 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 04:39:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1073 transitions. [2021-06-05 04:39:39,959 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1073 transitions. Word has length 20 [2021-06-05 04:39:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:39,959 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1073 transitions. [2021-06-05 04:39:39,959 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 04:39:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1073 transitions. [2021-06-05 04:39:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:39,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:39,959 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:40,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 04:39:40,177 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:40,177 INFO L82 PathProgramCache]: Analyzing trace with hash -390065231, now seen corresponding path program 28 times [2021-06-05 04:39:40,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:40,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131086139] [2021-06-05 04:39:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:40,237 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 04:39:40,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:40,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131086139] [2021-06-05 04:39:40,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131086139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:40,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915429228] [2021-06-05 04:39:40,238 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 04:39:40,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:40,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:40,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:40,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:40,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:40,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915429228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:40,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:40,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:40,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056734884] [2021-06-05 04:39:40,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:40,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:40,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:40,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:40,428 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 04:39:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:40,613 INFO L93 Difference]: Finished difference Result 520 states and 1545 transitions. [2021-06-05 04:39:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:40,614 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 04:39:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:40,615 INFO L225 Difference]: With dead ends: 520 [2021-06-05 04:39:40,615 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 04:39:40,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 04:39:40,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 346. [2021-06-05 04:39:40,620 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 04:39:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1095 transitions. [2021-06-05 04:39:40,621 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1095 transitions. Word has length 20 [2021-06-05 04:39:40,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:40,621 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1095 transitions. [2021-06-05 04:39:40,621 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 04:39:40,621 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1095 transitions. [2021-06-05 04:39:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:40,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:40,622 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 04:39:40,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:40,834 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:40,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:40,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1883972953, now seen corresponding path program 29 times [2021-06-05 04:39:40,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:40,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008666868] [2021-06-05 04:39:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:40,884 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 04:39:40,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:40,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008666868] [2021-06-05 04:39:40,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008666868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:40,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461636680] [2021-06-05 04:39:40,884 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 04:39:40,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:40,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:40,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:40,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:41,064 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 04:39:41,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461636680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:41,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:41,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:41,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299740916] [2021-06-05 04:39:41,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:41,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:41,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:41,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:41,065 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 04:39:41,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:41,338 INFO L93 Difference]: Finished difference Result 526 states and 1552 transitions. [2021-06-05 04:39:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:39:41,338 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 04:39:41,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:41,340 INFO L225 Difference]: With dead ends: 526 [2021-06-05 04:39:41,340 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 04:39:41,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:39:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 04:39:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 343. [2021-06-05 04:39:41,344 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 04:39:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1084 transitions. [2021-06-05 04:39:41,345 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1084 transitions. Word has length 20 [2021-06-05 04:39:41,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:41,345 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1084 transitions. [2021-06-05 04:39:41,345 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 04:39:41,345 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1084 transitions. [2021-06-05 04:39:41,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:41,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:41,346 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:41,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 04:39:41,561 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:41,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:41,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1346117375, now seen corresponding path program 30 times [2021-06-05 04:39:41,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:41,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170585408] [2021-06-05 04:39:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:41,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:41,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170585408] [2021-06-05 04:39:41,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170585408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:41,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684347693] [2021-06-05 04:39:41,611 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 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 04:39:41,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:39:41,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:41,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:41,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:41,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684347693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:41,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:41,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:41,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066349454] [2021-06-05 04:39:41,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:41,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:41,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:41,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:41,778 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 04:39:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:42,032 INFO L93 Difference]: Finished difference Result 484 states and 1457 transitions. [2021-06-05 04:39:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:42,032 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 04:39:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:42,034 INFO L225 Difference]: With dead ends: 484 [2021-06-05 04:39:42,034 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 04:39:42,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 04:39:42,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 335. [2021-06-05 04:39:42,038 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 04:39:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1060 transitions. [2021-06-05 04:39:42,039 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1060 transitions. Word has length 20 [2021-06-05 04:39:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:42,039 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1060 transitions. [2021-06-05 04:39:42,039 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 04:39:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1060 transitions. [2021-06-05 04:39:42,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:42,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:42,039 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:42,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 04:39:42,249 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1184106974, now seen corresponding path program 31 times [2021-06-05 04:39:42,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:42,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199749565] [2021-06-05 04:39:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:42,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:42,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199749565] [2021-06-05 04:39:42,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199749565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:42,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486860228] [2021-06-05 04:39:42,294 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 04:39:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:42,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:42,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:42,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:42,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:42,423 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-06-05 04:39:42,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:42,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:42,429 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 04:39:42,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:42,450 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:39:42,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:42,450 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:54, output treesize:20 [2021-06-05 04:39:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:42,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486860228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:42,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:42,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:39:42,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266639776] [2021-06-05 04:39:42,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:42,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:42,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:42,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:42,512 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 04:39:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:42,767 INFO L93 Difference]: Finished difference Result 528 states and 1594 transitions. [2021-06-05 04:39:42,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:42,767 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 04:39:42,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:42,769 INFO L225 Difference]: With dead ends: 528 [2021-06-05 04:39:42,769 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 04:39:42,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:42,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 04:39:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 340. [2021-06-05 04:39:42,775 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 04:39:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1085 transitions. [2021-06-05 04:39:42,776 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1085 transitions. Word has length 20 [2021-06-05 04:39:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:42,776 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1085 transitions. [2021-06-05 04:39:42,776 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 04:39:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1085 transitions. [2021-06-05 04:39:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:42,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:42,777 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 04:39:42,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:42,989 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:42,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2101485159, now seen corresponding path program 32 times [2021-06-05 04:39:42,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:42,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45832265] [2021-06-05 04:39:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:43,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:43,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45832265] [2021-06-05 04:39:43,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45832265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:43,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319729310] [2021-06-05 04:39:43,045 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 04:39:43,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:43,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:43,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:43,154 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 04:39:43,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:43,194 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.4 percent of original size [2021-06-05 04:39:43,197 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 6 treesize of output 4 [2021-06-05 04:39:43,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:43,228 INFO L628 ElimStorePlain]: treesize reduction 8, result has 83.3 percent of original size [2021-06-05 04:39:43,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:43,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:43,234 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 13 treesize of output 9 [2021-06-05 04:39:43,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:43,251 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:39:43,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:43,252 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:61, output treesize:20 [2021-06-05 04:39:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:43,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319729310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:43,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:43,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:39:43,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793371997] [2021-06-05 04:39:43,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:43,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:43,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:43,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:43,295 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 04:39:43,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:43,718 INFO L93 Difference]: Finished difference Result 649 states and 1911 transitions. [2021-06-05 04:39:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:39:43,718 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 04:39:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:43,720 INFO L225 Difference]: With dead ends: 649 [2021-06-05 04:39:43,720 INFO L226 Difference]: Without dead ends: 649 [2021-06-05 04:39:43,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:39:43,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-05 04:39:43,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 352. [2021-06-05 04:39:43,725 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 04:39:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1126 transitions. [2021-06-05 04:39:43,726 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1126 transitions. Word has length 20 [2021-06-05 04:39:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:43,726 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1126 transitions. [2021-06-05 04:39:43,726 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 04:39:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1126 transitions. [2021-06-05 04:39:43,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:43,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:43,727 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 04:39:43,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:43,941 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:43,941 INFO L82 PathProgramCache]: Analyzing trace with hash -942841629, now seen corresponding path program 33 times [2021-06-05 04:39:43,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:43,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118419818] [2021-06-05 04:39:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:44,010 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 04:39:44,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:44,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118419818] [2021-06-05 04:39:44,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118419818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:44,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913248554] [2021-06-05 04:39:44,010 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 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 04:39:44,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:39:44,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:44,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:44,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:44,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:44,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:44,166 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-06-05 04:39:44,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:44,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:44,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:44,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:44,192 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:39:44,192 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:39:44,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:44,193 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 04:39:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:44,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913248554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:44,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:44,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:39:44,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013196529] [2021-06-05 04:39:44,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:44,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:44,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:44,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:44,247 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 04:39:44,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:44,537 INFO L93 Difference]: Finished difference Result 701 states and 2032 transitions. [2021-06-05 04:39:44,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:44,537 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 04:39:44,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:44,555 INFO L225 Difference]: With dead ends: 701 [2021-06-05 04:39:44,555 INFO L226 Difference]: Without dead ends: 701 [2021-06-05 04:39:44,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:39:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-05 04:39:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 358. [2021-06-05 04:39:44,561 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 04:39:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 1151 transitions. [2021-06-05 04:39:44,562 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 1151 transitions. Word has length 20 [2021-06-05 04:39:44,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:44,562 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 1151 transitions. [2021-06-05 04:39:44,562 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 04:39:44,562 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 1151 transitions. [2021-06-05 04:39:44,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:44,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:44,562 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:44,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:44,765 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:44,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1858217945, now seen corresponding path program 34 times [2021-06-05 04:39:44,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:44,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112305201] [2021-06-05 04:39:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:44,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:44,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112305201] [2021-06-05 04:39:44,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112305201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:44,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346710726] [2021-06-05 04:39:44,818 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 04:39:44,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:44,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:44,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:44,926 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 6 treesize of output 4 [2021-06-05 04:39:44,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:44,929 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 13 treesize of output 9 [2021-06-05 04:39:44,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:44,951 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-06-05 04:39:44,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:44,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:44,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:44,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:44,964 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 04:39:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:45,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346710726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:45,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:45,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:39:45,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349878373] [2021-06-05 04:39:45,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:39:45,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:45,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:39:45,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:39:45,017 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 04:39:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:45,248 INFO L93 Difference]: Finished difference Result 658 states and 1923 transitions. [2021-06-05 04:39:45,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:45,248 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 04:39:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:45,250 INFO L225 Difference]: With dead ends: 658 [2021-06-05 04:39:45,250 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 04:39:45,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:39:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 04:39:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 356. [2021-06-05 04:39:45,255 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 04:39:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1140 transitions. [2021-06-05 04:39:45,256 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1140 transitions. Word has length 20 [2021-06-05 04:39:45,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:45,256 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1140 transitions. [2021-06-05 04:39:45,256 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 04:39:45,256 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1140 transitions. [2021-06-05 04:39:45,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:45,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:45,257 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 04:39:45,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:45,472 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:45,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:45,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1690972674, now seen corresponding path program 35 times [2021-06-05 04:39:45,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:45,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347213442] [2021-06-05 04:39:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:45,510 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 04:39:45,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:45,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347213442] [2021-06-05 04:39:45,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347213442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:45,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135701885] [2021-06-05 04:39:45,511 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 04:39:45,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:39:45,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:45,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:45,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:45,611 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 12 treesize of output 8 [2021-06-05 04:39:45,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:45,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:45,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:45,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:45,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:45,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:45,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:45,640 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 04:39:45,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:45,641 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-06-05 04:39:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:45,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135701885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:45,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:45,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:39:45,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456173423] [2021-06-05 04:39:45,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:45,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:45,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:45,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:45,695 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 04:39:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:45,948 INFO L93 Difference]: Finished difference Result 461 states and 1410 transitions. [2021-06-05 04:39:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:45,948 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 04:39:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:45,949 INFO L225 Difference]: With dead ends: 461 [2021-06-05 04:39:45,949 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 04:39:45,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 04:39:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 347. [2021-06-05 04:39:45,953 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 04:39:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1099 transitions. [2021-06-05 04:39:45,954 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1099 transitions. Word has length 20 [2021-06-05 04:39:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:45,954 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1099 transitions. [2021-06-05 04:39:45,954 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 04:39:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1099 transitions. [2021-06-05 04:39:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:45,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:45,954 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 04:39:46,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-06-05 04:39:46,163 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:46,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:46,163 INFO L82 PathProgramCache]: Analyzing trace with hash -282908061, now seen corresponding path program 36 times [2021-06-05 04:39:46,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:46,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496211410] [2021-06-05 04:39:46,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:46,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:46,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496211410] [2021-06-05 04:39:46,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496211410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:46,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898988139] [2021-06-05 04:39:46,217 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 04:39:46,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:39:46,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:46,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:46,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:46,332 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 04:39:46,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:46,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:46,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:46,358 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 04:39:46,360 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 12 treesize of output 8 [2021-06-05 04:39:46,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:46,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:46,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:46,369 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 04:39:46,420 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 04:39:46,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898988139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:46,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:46,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:46,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535135619] [2021-06-05 04:39:46,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:46,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:46,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:46,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:46,421 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 04:39:46,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:46,686 INFO L93 Difference]: Finished difference Result 602 states and 1789 transitions. [2021-06-05 04:39:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:46,686 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 04:39:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:46,687 INFO L225 Difference]: With dead ends: 602 [2021-06-05 04:39:46,687 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 04:39:46,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 04:39:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 337. [2021-06-05 04:39:46,692 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 04:39:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1068 transitions. [2021-06-05 04:39:46,692 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1068 transitions. Word has length 20 [2021-06-05 04:39:46,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:46,692 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1068 transitions. [2021-06-05 04:39:46,692 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 04:39:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1068 transitions. [2021-06-05 04:39:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:46,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:46,693 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:46,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:46,895 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1350143331, now seen corresponding path program 37 times [2021-06-05 04:39:46,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:46,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331514094] [2021-06-05 04:39:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:46,951 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 04:39:46,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:46,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331514094] [2021-06-05 04:39:46,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331514094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:46,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610007172] [2021-06-05 04:39:46,951 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 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 04:39:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:47,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:47,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:47,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:47,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:47,113 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-06-05 04:39:47,115 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 04:39:47,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:47,118 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 12 treesize of output 8 [2021-06-05 04:39:47,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:47,135 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:39:47,135 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:39:47,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:47,136 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 04:39:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:47,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610007172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:47,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:47,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:47,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550819324] [2021-06-05 04:39:47,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:47,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:47,203 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 04:39:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:47,588 INFO L93 Difference]: Finished difference Result 598 states and 1773 transitions. [2021-06-05 04:39:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:39:47,589 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 04:39:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:47,590 INFO L225 Difference]: With dead ends: 598 [2021-06-05 04:39:47,590 INFO L226 Difference]: Without dead ends: 598 [2021-06-05 04:39:47,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 377.7ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:39:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-06-05 04:39:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 340. [2021-06-05 04:39:47,594 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 04:39:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1083 transitions. [2021-06-05 04:39:47,595 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1083 transitions. Word has length 20 [2021-06-05 04:39:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:47,595 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1083 transitions. [2021-06-05 04:39:47,595 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 04:39:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1083 transitions. [2021-06-05 04:39:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:47,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:47,596 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:47,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:47,809 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:47,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:47,809 INFO L82 PathProgramCache]: Analyzing trace with hash -606993625, now seen corresponding path program 38 times [2021-06-05 04:39:47,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:47,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416065609] [2021-06-05 04:39:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:47,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:47,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416065609] [2021-06-05 04:39:47,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416065609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:47,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562622236] [2021-06-05 04:39:47,864 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 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 04:39:47,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:47,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:47,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:47,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:47,975 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 6 treesize of output 4 [2021-06-05 04:39:47,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:48,007 INFO L628 ElimStorePlain]: treesize reduction 30, result has 57.1 percent of original size [2021-06-05 04:39:48,009 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 12 treesize of output 8 [2021-06-05 04:39:48,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:48,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:48,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:48,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:48,041 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:39:48,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:48,041 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-06-05 04:39:48,108 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 04:39:48,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562622236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:48,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:48,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:48,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221882566] [2021-06-05 04:39:48,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:48,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:48,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:48,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:48,109 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 04:39:48,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:48,392 INFO L93 Difference]: Finished difference Result 536 states and 1630 transitions. [2021-06-05 04:39:48,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:48,392 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 04:39:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:48,393 INFO L225 Difference]: With dead ends: 536 [2021-06-05 04:39:48,393 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 04:39:48,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 04:39:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 340. [2021-06-05 04:39:48,398 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 04:39:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1083 transitions. [2021-06-05 04:39:48,398 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1083 transitions. Word has length 20 [2021-06-05 04:39:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:48,398 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1083 transitions. [2021-06-05 04:39:48,398 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 04:39:48,398 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1083 transitions. [2021-06-05 04:39:48,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:48,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:48,399 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 04:39:48,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:48,599 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:48,600 INFO L82 PathProgramCache]: Analyzing trace with hash 681956465, now seen corresponding path program 39 times [2021-06-05 04:39:48,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:48,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510618307] [2021-06-05 04:39:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:48,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:48,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510618307] [2021-06-05 04:39:48,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510618307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:48,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167658047] [2021-06-05 04:39:48,659 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 04:39:48,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:39:48,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:48,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:48,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:48,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:48,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:48,777 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 12 treesize of output 8 [2021-06-05 04:39:48,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:48,822 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-06-05 04:39:48,824 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 04:39:48,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:48,845 INFO L628 ElimStorePlain]: treesize reduction 24, result has 45.5 percent of original size [2021-06-05 04:39:48,845 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:39:48,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:48,846 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 04:39:48,918 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 04:39:48,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167658047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:48,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:48,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:48,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861850666] [2021-06-05 04:39:48,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:48,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:48,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:48,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:48,919 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 04:39:49,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:49,225 INFO L93 Difference]: Finished difference Result 646 states and 1914 transitions. [2021-06-05 04:39:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:49,225 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 04:39:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:49,226 INFO L225 Difference]: With dead ends: 646 [2021-06-05 04:39:49,227 INFO L226 Difference]: Without dead ends: 646 [2021-06-05 04:39:49,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:49,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-05 04:39:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 348. [2021-06-05 04:39:49,231 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 04:39:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1119 transitions. [2021-06-05 04:39:49,232 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1119 transitions. Word has length 20 [2021-06-05 04:39:49,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:49,232 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1119 transitions. [2021-06-05 04:39:49,232 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 04:39:49,232 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1119 transitions. [2021-06-05 04:39:49,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:49,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:49,233 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 04:39:49,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 04:39:49,433 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:49,434 INFO L82 PathProgramCache]: Analyzing trace with hash -811951257, now seen corresponding path program 40 times [2021-06-05 04:39:49,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:49,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526143782] [2021-06-05 04:39:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:49,489 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 04:39:49,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:49,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526143782] [2021-06-05 04:39:49,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526143782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:49,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86730802] [2021-06-05 04:39:49,489 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 04:39:49,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:49,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:49,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:49,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:49,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:49,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:49,601 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 12 treesize of output 8 [2021-06-05 04:39:49,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:49,604 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 04:39:49,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:49,607 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 04:39:49,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:49,638 INFO L628 ElimStorePlain]: treesize reduction 14, result has 70.8 percent of original size [2021-06-05 04:39:49,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:49,640 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:49,659 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-06-05 04:39:49,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:49,659 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:90, output treesize:20 [2021-06-05 04:39:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:49,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86730802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:49,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:49,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:49,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652006406] [2021-06-05 04:39:49,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:49,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:49,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:49,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:49,731 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 04:39:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:50,045 INFO L93 Difference]: Finished difference Result 632 states and 1863 transitions. [2021-06-05 04:39:50,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:50,057 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 04:39:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:50,058 INFO L225 Difference]: With dead ends: 632 [2021-06-05 04:39:50,058 INFO L226 Difference]: Without dead ends: 626 [2021-06-05 04:39:50,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:50,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-05 04:39:50,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 351. [2021-06-05 04:39:50,064 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 04:39:50,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1121 transitions. [2021-06-05 04:39:50,064 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1121 transitions. Word has length 20 [2021-06-05 04:39:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:50,065 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1121 transitions. [2021-06-05 04:39:50,066 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 04:39:50,066 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1121 transitions. [2021-06-05 04:39:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:50,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:50,082 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 04:39:50,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:50,293 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1433356903, now seen corresponding path program 41 times [2021-06-05 04:39:50,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:50,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619003339] [2021-06-05 04:39:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:50,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:50,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619003339] [2021-06-05 04:39:50,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619003339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:50,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358485677] [2021-06-05 04:39:50,348 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 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 04:39:50,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:39:50,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:50,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:50,470 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 04:39:50,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:50,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:50,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:50,520 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-06-05 04:39:50,522 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 04:39:50,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:50,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:50,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:50,558 INFO L628 ElimStorePlain]: treesize reduction 10, result has 77.3 percent of original size [2021-06-05 04:39:50,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:50,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:50,577 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-06-05 04:39:50,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:50,578 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 04:39:50,650 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 04:39:50,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358485677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:50,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:50,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:50,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981731341] [2021-06-05 04:39:50,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:50,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:50,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:50,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:50,650 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 04:39:51,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:51,080 INFO L93 Difference]: Finished difference Result 677 states and 1978 transitions. [2021-06-05 04:39:51,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:39:51,080 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 04:39:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:51,081 INFO L225 Difference]: With dead ends: 677 [2021-06-05 04:39:51,081 INFO L226 Difference]: Without dead ends: 677 [2021-06-05 04:39:51,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:39:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-05 04:39:51,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 344. [2021-06-05 04:39:51,086 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 04:39:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1103 transitions. [2021-06-05 04:39:51,086 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1103 transitions. Word has length 20 [2021-06-05 04:39:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:51,087 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1103 transitions. [2021-06-05 04:39:51,087 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 04:39:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1103 transitions. [2021-06-05 04:39:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:51,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:51,087 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 04:39:51,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:51,288 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:51,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1569267993, now seen corresponding path program 42 times [2021-06-05 04:39:51,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:51,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378513497] [2021-06-05 04:39:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:51,348 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 04:39:51,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:51,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378513497] [2021-06-05 04:39:51,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378513497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:51,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419673408] [2021-06-05 04:39:51,349 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 04:39:51,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:39:51,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:51,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:51,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:51,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:51,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:51,472 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 5 treesize of output 3 [2021-06-05 04:39:51,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:51,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:39:51,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:51,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:51,494 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 13 treesize of output 9 [2021-06-05 04:39:51,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:51,513 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:39:51,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:51,514 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:39:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:51,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419673408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:51,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:51,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:51,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236564340] [2021-06-05 04:39:51,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:51,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:51,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:51,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:51,587 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 04:39:51,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:51,864 INFO L93 Difference]: Finished difference Result 611 states and 1830 transitions. [2021-06-05 04:39:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:51,864 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 04:39:51,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:51,865 INFO L225 Difference]: With dead ends: 611 [2021-06-05 04:39:51,865 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 04:39:51,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 04:39:51,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 341. [2021-06-05 04:39:51,870 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 04:39:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1088 transitions. [2021-06-05 04:39:51,870 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1088 transitions. Word has length 20 [2021-06-05 04:39:51,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:51,871 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1088 transitions. [2021-06-05 04:39:51,871 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 04:39:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1088 transitions. [2021-06-05 04:39:51,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:51,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:51,871 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:52,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:52,072 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:52,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1454093431, now seen corresponding path program 43 times [2021-06-05 04:39:52,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:52,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827217762] [2021-06-05 04:39:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:52,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:52,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827217762] [2021-06-05 04:39:52,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827217762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:52,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849203265] [2021-06-05 04:39:52,127 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 04:39:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:52,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:52,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:52,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:39:52,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:52,272 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 12 treesize of output 8 [2021-06-05 04:39:52,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:52,314 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-06-05 04:39:52,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:52,317 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:52,342 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-06-05 04:39:52,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:39:52,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:52,361 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:39:52,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:52,362 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-06-05 04:39:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:52,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849203265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:52,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:52,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:52,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054223119] [2021-06-05 04:39:52,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:52,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:52,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:52,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:52,435 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 04:39:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:52,868 INFO L93 Difference]: Finished difference Result 583 states and 1732 transitions. [2021-06-05 04:39:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:39:52,868 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 04:39:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:52,869 INFO L225 Difference]: With dead ends: 583 [2021-06-05 04:39:52,869 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 04:39:52,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 420.4ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:39:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 04:39:52,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 351. [2021-06-05 04:39:52,874 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 04:39:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1115 transitions. [2021-06-05 04:39:52,875 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1115 transitions. Word has length 20 [2021-06-05 04:39:52,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:52,875 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1115 transitions. [2021-06-05 04:39:52,875 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 04:39:52,875 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1115 transitions. [2021-06-05 04:39:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:52,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:52,875 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 04:39:53,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:53,076 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:53,076 INFO L82 PathProgramCache]: Analyzing trace with hash -461330495, now seen corresponding path program 44 times [2021-06-05 04:39:53,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:53,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665813419] [2021-06-05 04:39:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:53,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:53,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665813419] [2021-06-05 04:39:53,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665813419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:53,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771138060] [2021-06-05 04:39:53,133 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 04:39:53,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:53,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:53,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:53,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:53,260 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 13 treesize of output 9 [2021-06-05 04:39:53,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:53,263 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 12 treesize of output 8 [2021-06-05 04:39:53,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:53,300 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-06-05 04:39:53,302 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 6 treesize of output 4 [2021-06-05 04:39:53,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:39:53,322 INFO L628 ElimStorePlain]: treesize reduction 24, result has 45.5 percent of original size [2021-06-05 04:39:53,323 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:39:53,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:39:53,323 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 04:39:53,392 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 04:39:53,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771138060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:53,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:53,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:53,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163078204] [2021-06-05 04:39:53,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:53,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:53,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:53,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:53,393 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 04:39:53,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:53,650 INFO L93 Difference]: Finished difference Result 554 states and 1678 transitions. [2021-06-05 04:39:53,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:53,650 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 04:39:53,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:53,651 INFO L225 Difference]: With dead ends: 554 [2021-06-05 04:39:53,651 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 04:39:53,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:53,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 04:39:53,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 343. [2021-06-05 04:39:53,656 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 04:39:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1093 transitions. [2021-06-05 04:39:53,656 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1093 transitions. Word has length 20 [2021-06-05 04:39:53,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:53,657 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1093 transitions. [2021-06-05 04:39:53,657 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 04:39:53,657 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1093 transitions. [2021-06-05 04:39:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:53,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:53,657 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:53,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2021-06-05 04:39:53,858 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:53,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:53,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1560931869, now seen corresponding path program 45 times [2021-06-05 04:39:53,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:53,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775553242] [2021-06-05 04:39:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:53,921 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 04:39:53,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:53,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775553242] [2021-06-05 04:39:53,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775553242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:53,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429787794] [2021-06-05 04:39:53,921 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 04:39:53,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:39:53,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:53,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:53,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:54,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429787794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:54,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:54,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:54,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901796717] [2021-06-05 04:39:54,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:54,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:54,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:54,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:54,137 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 04:39:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:54,448 INFO L93 Difference]: Finished difference Result 531 states and 1604 transitions. [2021-06-05 04:39:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:54,448 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 04:39:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:54,449 INFO L225 Difference]: With dead ends: 531 [2021-06-05 04:39:54,449 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 04:39:54,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 307.4ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 04:39:54,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 350. [2021-06-05 04:39:54,453 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 04:39:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1120 transitions. [2021-06-05 04:39:54,454 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1120 transitions. Word has length 20 [2021-06-05 04:39:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:54,454 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1120 transitions. [2021-06-05 04:39:54,454 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 04:39:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1120 transitions. [2021-06-05 04:39:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:54,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:54,455 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:54,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:54,655 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:54,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:54,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1240127705, now seen corresponding path program 46 times [2021-06-05 04:39:54,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:54,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728727273] [2021-06-05 04:39:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:54,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:54,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728727273] [2021-06-05 04:39:54,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728727273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:54,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775206727] [2021-06-05 04:39:54,713 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 04:39:54,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:54,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:54,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:54,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:54,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775206727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:54,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:54,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:54,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517357933] [2021-06-05 04:39:54,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:54,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:54,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:54,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:54,903 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 04:39:55,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:55,235 INFO L93 Difference]: Finished difference Result 537 states and 1611 transitions. [2021-06-05 04:39:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:39:55,236 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 04:39:55,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:55,237 INFO L225 Difference]: With dead ends: 537 [2021-06-05 04:39:55,237 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 04:39:55,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:39:55,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 04:39:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 347. [2021-06-05 04:39:55,241 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 04:39:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1109 transitions. [2021-06-05 04:39:55,242 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1109 transitions. Word has length 20 [2021-06-05 04:39:55,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:55,242 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1109 transitions. [2021-06-05 04:39:55,242 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 04:39:55,242 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1109 transitions. [2021-06-05 04:39:55,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:55,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:55,242 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 04:39:55,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 04:39:55,444 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:55,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1777983283, now seen corresponding path program 47 times [2021-06-05 04:39:55,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:55,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823166975] [2021-06-05 04:39:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:55,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:55,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823166975] [2021-06-05 04:39:55,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823166975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:55,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404697306] [2021-06-05 04:39:55,503 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 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 04:39:55,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:55,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:55,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:55,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:55,692 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 04:39:55,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404697306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:55,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:55,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:55,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913173877] [2021-06-05 04:39:55,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:55,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:55,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:55,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:55,692 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 04:39:56,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:56,007 INFO L93 Difference]: Finished difference Result 501 states and 1529 transitions. [2021-06-05 04:39:56,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:56,007 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 04:39:56,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:56,008 INFO L225 Difference]: With dead ends: 501 [2021-06-05 04:39:56,008 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:39:56,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 335.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:56,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:39:56,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 344. [2021-06-05 04:39:56,013 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 04:39:56,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1098 transitions. [2021-06-05 04:39:56,013 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1098 transitions. Word has length 20 [2021-06-05 04:39:56,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:56,013 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1098 transitions. [2021-06-05 04:39:56,013 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 04:39:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1098 transitions. [2021-06-05 04:39:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:56,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:56,014 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 04:39:56,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:56,215 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:56,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:56,216 INFO L82 PathProgramCache]: Analyzing trace with hash 257645229, now seen corresponding path program 48 times [2021-06-05 04:39:56,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:56,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857968320] [2021-06-05 04:39:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:56,278 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 04:39:56,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:56,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857968320] [2021-06-05 04:39:56,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857968320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:56,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694736767] [2021-06-05 04:39:56,278 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 04:39:56,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:39:56,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:56,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:56,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:56,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694736767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:56,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:56,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:56,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037413023] [2021-06-05 04:39:56,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:56,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:56,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:56,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:56,480 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 04:39:56,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:56,856 INFO L93 Difference]: Finished difference Result 615 states and 1814 transitions. [2021-06-05 04:39:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:39:56,856 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 04:39:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:56,857 INFO L225 Difference]: With dead ends: 615 [2021-06-05 04:39:56,857 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 04:39:56,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:39:56,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 04:39:56,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 352. [2021-06-05 04:39:56,862 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 04:39:56,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1134 transitions. [2021-06-05 04:39:56,862 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1134 transitions. Word has length 20 [2021-06-05 04:39:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:56,863 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1134 transitions. [2021-06-05 04:39:56,863 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 04:39:56,863 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1134 transitions. [2021-06-05 04:39:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:56,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:56,863 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 04:39:57,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:57,064 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1236262493, now seen corresponding path program 49 times [2021-06-05 04:39:57,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:57,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747936625] [2021-06-05 04:39:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:57,128 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 04:39:57,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:57,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747936625] [2021-06-05 04:39:57,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747936625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:57,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627139605] [2021-06-05 04:39:57,128 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 04:39:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:57,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:57,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:57,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627139605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:57,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:57,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:57,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145375423] [2021-06-05 04:39:57,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:57,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:57,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:57,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:57,337 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 04:39:57,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:57,798 INFO L93 Difference]: Finished difference Result 621 states and 1815 transitions. [2021-06-05 04:39:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:39:57,799 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 04:39:57,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:57,800 INFO L225 Difference]: With dead ends: 621 [2021-06-05 04:39:57,800 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 04:39:57,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:39:57,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 04:39:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 355. [2021-06-05 04:39:57,805 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 04:39:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1136 transitions. [2021-06-05 04:39:57,805 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1136 transitions. Word has length 20 [2021-06-05 04:39:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:57,805 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1136 transitions. [2021-06-05 04:39:57,805 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 04:39:57,805 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1136 transitions. [2021-06-05 04:39:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:57,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:57,806 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 04:39:58,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:39:58,021 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1009045667, now seen corresponding path program 50 times [2021-06-05 04:39:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:58,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952588960] [2021-06-05 04:39:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:58,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:58,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952588960] [2021-06-05 04:39:58,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952588960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:58,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487581946] [2021-06-05 04:39:58,088 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 04:39:58,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:39:58,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:58,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:58,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:58,296 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 04:39:58,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487581946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:58,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:58,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:58,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942909653] [2021-06-05 04:39:58,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:58,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:58,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:58,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:58,297 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 04:39:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:58,667 INFO L93 Difference]: Finished difference Result 612 states and 1801 transitions. [2021-06-05 04:39:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:39:58,667 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 04:39:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:58,668 INFO L225 Difference]: With dead ends: 612 [2021-06-05 04:39:58,668 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 04:39:58,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 391.6ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:39:58,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 04:39:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 348. [2021-06-05 04:39:58,676 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 04:39:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1118 transitions. [2021-06-05 04:39:58,677 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1118 transitions. Word has length 20 [2021-06-05 04:39:58,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:58,677 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1118 transitions. [2021-06-05 04:39:58,677 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 04:39:58,677 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1118 transitions. [2021-06-05 04:39:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:58,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:58,677 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 04:39:58,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 04:39:58,878 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:58,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1993579229, now seen corresponding path program 51 times [2021-06-05 04:39:58,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:58,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068402638] [2021-06-05 04:39:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:58,942 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 04:39:58,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:58,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068402638] [2021-06-05 04:39:58,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068402638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:58,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618400207] [2021-06-05 04:39:58,942 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 04:39:58,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:39:58,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:58,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:58,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:59,128 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 04:39:59,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618400207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:59,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:59,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:59,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670823407] [2021-06-05 04:39:59,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:59,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:59,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:59,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:59,137 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 04:39:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:39:59,349 INFO L93 Difference]: Finished difference Result 546 states and 1653 transitions. [2021-06-05 04:39:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:39:59,349 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 04:39:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:39:59,350 INFO L225 Difference]: With dead ends: 546 [2021-06-05 04:39:59,350 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 04:39:59,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:39:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 04:39:59,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 345. [2021-06-05 04:39:59,354 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 04:39:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1103 transitions. [2021-06-05 04:39:59,355 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1103 transitions. Word has length 20 [2021-06-05 04:39:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:39:59,355 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1103 transitions. [2021-06-05 04:39:59,355 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 04:39:59,355 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1103 transitions. [2021-06-05 04:39:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:39:59,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:39:59,356 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:39:59,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 04:39:59,565 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:39:59,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:39:59,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1029782195, now seen corresponding path program 52 times [2021-06-05 04:39:59,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:39:59,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427455873] [2021-06-05 04:39:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:39:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:39:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:59,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:39:59,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427455873] [2021-06-05 04:39:59,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427455873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:59,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493087037] [2021-06-05 04:39:59,630 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 04:39:59,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:39:59,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:39:59,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:39:59,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:39:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:39:59,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493087037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:39:59,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:39:59,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:39:59,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271538749] [2021-06-05 04:39:59,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:39:59,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:39:59,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:39:59,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:39:59,803 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 04:40:00,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:00,297 INFO L93 Difference]: Finished difference Result 589 states and 1742 transitions. [2021-06-05 04:40:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:40:00,297 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 04:40:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:00,298 INFO L225 Difference]: With dead ends: 589 [2021-06-05 04:40:00,298 INFO L226 Difference]: Without dead ends: 583 [2021-06-05 04:40:00,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 496.1ms TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:40:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-06-05 04:40:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 355. [2021-06-05 04:40:00,303 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 04:40:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1130 transitions. [2021-06-05 04:40:00,303 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1130 transitions. Word has length 20 [2021-06-05 04:40:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:00,304 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1130 transitions. [2021-06-05 04:40:00,304 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 04:40:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1130 transitions. [2021-06-05 04:40:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:00,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:00,304 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 04:40:00,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 04:40:00,513 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash -885641731, now seen corresponding path program 53 times [2021-06-05 04:40:00,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:00,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417421938] [2021-06-05 04:40:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:00,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:00,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417421938] [2021-06-05 04:40:00,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417421938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:00,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521886859] [2021-06-05 04:40:00,577 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 04:40:00,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:40:00,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:00,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:00,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:00,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521886859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:00,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:00,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:00,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090149126] [2021-06-05 04:40:00,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:00,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:00,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:00,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:00,767 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 04:40:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:01,181 INFO L93 Difference]: Finished difference Result 560 states and 1688 transitions. [2021-06-05 04:40:01,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:01,182 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 04:40:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:01,183 INFO L225 Difference]: With dead ends: 560 [2021-06-05 04:40:01,183 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 04:40:01,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 369.7ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:40:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 04:40:01,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 344. [2021-06-05 04:40:01,187 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 04:40:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1098 transitions. [2021-06-05 04:40:01,188 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1098 transitions. Word has length 20 [2021-06-05 04:40:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:01,188 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1098 transitions. [2021-06-05 04:40:01,188 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 04:40:01,188 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1098 transitions. [2021-06-05 04:40:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:01,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:01,189 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 04:40:01,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:01,405 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash -989075421, now seen corresponding path program 54 times [2021-06-05 04:40:01,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:01,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067796859] [2021-06-05 04:40:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:01,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:01,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067796859] [2021-06-05 04:40:01,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067796859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:01,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793946330] [2021-06-05 04:40:01,458 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 04:40:01,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:40:01,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:01,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:01,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:01,644 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 04:40:01,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793946330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:01,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:01,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:01,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049844259] [2021-06-05 04:40:01,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:01,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:01,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:01,645 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 04:40:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:01,939 INFO L93 Difference]: Finished difference Result 492 states and 1505 transitions. [2021-06-05 04:40:01,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:01,939 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 04:40:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:01,940 INFO L225 Difference]: With dead ends: 492 [2021-06-05 04:40:01,940 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 04:40:01,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:40:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 04:40:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 346. [2021-06-05 04:40:01,944 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 04:40:01,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1103 transitions. [2021-06-05 04:40:01,945 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1103 transitions. Word has length 20 [2021-06-05 04:40:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:01,945 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1103 transitions. [2021-06-05 04:40:01,945 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 04:40:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1103 transitions. [2021-06-05 04:40:01,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:01,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:01,945 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 04:40:02,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 04:40:02,160 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:02,160 INFO L82 PathProgramCache]: Analyzing trace with hash -237674983, now seen corresponding path program 55 times [2021-06-05 04:40:02,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:02,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277742020] [2021-06-05 04:40:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:02,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:02,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277742020] [2021-06-05 04:40:02,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277742020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:02,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292938821] [2021-06-05 04:40:02,216 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 04:40:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:02,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:02,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:02,414 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 04:40:02,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292938821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:02,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:02,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:02,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268291501] [2021-06-05 04:40:02,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:02,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:02,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:02,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:02,415 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 04:40:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:02,781 INFO L93 Difference]: Finished difference Result 517 states and 1557 transitions. [2021-06-05 04:40:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:02,782 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 04:40:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:02,782 INFO L225 Difference]: With dead ends: 517 [2021-06-05 04:40:02,783 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 04:40:02,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:40:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 04:40:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 356. [2021-06-05 04:40:02,787 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 04:40:02,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1130 transitions. [2021-06-05 04:40:02,787 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1130 transitions. Word has length 20 [2021-06-05 04:40:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:02,788 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1130 transitions. [2021-06-05 04:40:02,788 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 04:40:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1130 transitions. [2021-06-05 04:40:02,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:02,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:02,788 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 04:40:02,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:02,989 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:02,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2141868387, now seen corresponding path program 56 times [2021-06-05 04:40:02,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:02,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530119513] [2021-06-05 04:40:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:02,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:03,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:03,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530119513] [2021-06-05 04:40:03,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530119513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:03,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373061269] [2021-06-05 04:40:03,088 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 04:40:03,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:03,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:03,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:03,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:03,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373061269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:03,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:03,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:03,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488404907] [2021-06-05 04:40:03,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:03,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:03,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:03,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:03,290 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 04:40:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:03,598 INFO L93 Difference]: Finished difference Result 488 states and 1503 transitions. [2021-06-05 04:40:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:03,598 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 04:40:03,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:03,599 INFO L225 Difference]: With dead ends: 488 [2021-06-05 04:40:03,599 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 04:40:03,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:40:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 04:40:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 346. [2021-06-05 04:40:03,603 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 04:40:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1103 transitions. [2021-06-05 04:40:03,603 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1103 transitions. Word has length 20 [2021-06-05 04:40:03,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:03,603 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1103 transitions. [2021-06-05 04:40:03,603 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 04:40:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1103 transitions. [2021-06-05 04:40:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:03,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:03,604 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:03,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-05 04:40:03,804 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:03,805 INFO L82 PathProgramCache]: Analyzing trace with hash -56954447, now seen corresponding path program 57 times [2021-06-05 04:40:03,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:03,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591022269] [2021-06-05 04:40:03,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:03,879 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 04:40:03,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:03,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591022269] [2021-06-05 04:40:03,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591022269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:03,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768515076] [2021-06-05 04:40:03,879 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 04:40:03,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:40:03,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:03,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:03,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:04,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768515076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:04,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:04,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:04,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310434064] [2021-06-05 04:40:04,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:04,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:04,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:04,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:04,065 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 04:40:04,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:04,495 INFO L93 Difference]: Finished difference Result 688 states and 2059 transitions. [2021-06-05 04:40:04,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:04,495 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 04:40:04,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:04,496 INFO L225 Difference]: With dead ends: 688 [2021-06-05 04:40:04,496 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 04:40:04,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:40:04,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 04:40:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 356. [2021-06-05 04:40:04,501 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 04:40:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1141 transitions. [2021-06-05 04:40:04,502 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1141 transitions. Word has length 20 [2021-06-05 04:40:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:04,502 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1141 transitions. [2021-06-05 04:40:04,502 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 04:40:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1141 transitions. [2021-06-05 04:40:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:04,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:04,503 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 04:40:04,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:04,703 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:04,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:04,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1550862169, now seen corresponding path program 58 times [2021-06-05 04:40:04,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:04,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58891757] [2021-06-05 04:40:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:04,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:04,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58891757] [2021-06-05 04:40:04,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58891757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:04,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039096436] [2021-06-05 04:40:04,770 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 04:40:04,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:04,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:04,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:04,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:04,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039096436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:04,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:04,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:04,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514083397] [2021-06-05 04:40:04,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:04,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:04,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:04,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:04,951 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 04:40:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:05,451 INFO L93 Difference]: Finished difference Result 694 states and 2066 transitions. [2021-06-05 04:40:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:40:05,451 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 04:40:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:05,452 INFO L225 Difference]: With dead ends: 694 [2021-06-05 04:40:05,452 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 04:40:05,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:40:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 04:40:05,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 353. [2021-06-05 04:40:05,457 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 04:40:05,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1130 transitions. [2021-06-05 04:40:05,458 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1130 transitions. Word has length 20 [2021-06-05 04:40:05,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:05,458 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1130 transitions. [2021-06-05 04:40:05,458 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 04:40:05,458 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1130 transitions. [2021-06-05 04:40:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:05,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:05,458 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 04:40:05,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-06-05 04:40:05,659 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:05,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:05,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1013006591, now seen corresponding path program 59 times [2021-06-05 04:40:05,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:05,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446907921] [2021-06-05 04:40:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:05,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:05,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446907921] [2021-06-05 04:40:05,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446907921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:05,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363965645] [2021-06-05 04:40:05,920 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 04:40:05,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:05,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:05,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:06,097 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 04:40:06,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363965645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:06,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:06,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:06,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494655553] [2021-06-05 04:40:06,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:06,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:06,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:06,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:06,099 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 04:40:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:06,511 INFO L93 Difference]: Finished difference Result 658 states and 1984 transitions. [2021-06-05 04:40:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:06,511 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 04:40:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:06,512 INFO L225 Difference]: With dead ends: 658 [2021-06-05 04:40:06,512 INFO L226 Difference]: Without dead ends: 646 [2021-06-05 04:40:06,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 565.7ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:40:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-06-05 04:40:06,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 350. [2021-06-05 04:40:06,518 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 04:40:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1119 transitions. [2021-06-05 04:40:06,519 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1119 transitions. Word has length 20 [2021-06-05 04:40:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:06,519 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1119 transitions. [2021-06-05 04:40:06,519 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 04:40:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1119 transitions. [2021-06-05 04:40:06,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:06,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:06,520 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 04:40:06,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:06,736 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash -425261269, now seen corresponding path program 60 times [2021-06-05 04:40:06,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:06,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936470573] [2021-06-05 04:40:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:06,797 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 04:40:06,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:06,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936470573] [2021-06-05 04:40:06,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936470573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:06,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605927434] [2021-06-05 04:40:06,797 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 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 04:40:06,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:40:06,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:06,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:06,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:06,991 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 04:40:06,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605927434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:06,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:06,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:06,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550316677] [2021-06-05 04:40:06,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:06,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:06,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:06,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:06,992 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 04:40:07,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:07,406 INFO L93 Difference]: Finished difference Result 690 states and 2044 transitions. [2021-06-05 04:40:07,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:07,407 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 04:40:07,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:07,407 INFO L225 Difference]: With dead ends: 690 [2021-06-05 04:40:07,407 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 04:40:07,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 421.8ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:40:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 04:40:07,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 347. [2021-06-05 04:40:07,412 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 04:40:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1108 transitions. [2021-06-05 04:40:07,413 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1108 transitions. Word has length 20 [2021-06-05 04:40:07,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:07,413 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1108 transitions. [2021-06-05 04:40:07,413 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 04:40:07,413 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1108 transitions. [2021-06-05 04:40:07,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:07,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:07,414 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 04:40:07,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-06-05 04:40:07,630 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:07,630 INFO L82 PathProgramCache]: Analyzing trace with hash -2098424725, now seen corresponding path program 61 times [2021-06-05 04:40:07,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:07,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873636308] [2021-06-05 04:40:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:07,716 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 04:40:07,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:07,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873636308] [2021-06-05 04:40:07,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873636308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:07,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93505354] [2021-06-05 04:40:07,716 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 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 04:40:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:07,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:07,916 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 04:40:07,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93505354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:07,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:07,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:07,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322905524] [2021-06-05 04:40:07,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:07,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:07,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:07,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:07,918 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 04:40:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:08,222 INFO L93 Difference]: Finished difference Result 627 states and 1898 transitions. [2021-06-05 04:40:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:08,222 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 04:40:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:08,223 INFO L225 Difference]: With dead ends: 627 [2021-06-05 04:40:08,223 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 04:40:08,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:40:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 04:40:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 354. [2021-06-05 04:40:08,234 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 04:40:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1135 transitions. [2021-06-05 04:40:08,235 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1135 transitions. Word has length 20 [2021-06-05 04:40:08,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:08,235 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1135 transitions. [2021-06-05 04:40:08,235 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 04:40:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1135 transitions. [2021-06-05 04:40:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:08,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:08,236 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:08,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable672,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:08,452 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:08,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:08,452 INFO L82 PathProgramCache]: Analyzing trace with hash 702634849, now seen corresponding path program 62 times [2021-06-05 04:40:08,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:08,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303790846] [2021-06-05 04:40:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:08,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:08,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303790846] [2021-06-05 04:40:08,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303790846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:08,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527270205] [2021-06-05 04:40:08,508 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 04:40:08,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:08,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:08,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:08,722 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 04:40:08,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527270205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:08,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:08,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:08,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923878822] [2021-06-05 04:40:08,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:08,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:08,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:08,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:08,723 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 04:40:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:09,278 INFO L93 Difference]: Finished difference Result 633 states and 1905 transitions. [2021-06-05 04:40:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:40:09,279 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 04:40:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:09,279 INFO L225 Difference]: With dead ends: 633 [2021-06-05 04:40:09,279 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 04:40:09,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:40:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 04:40:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 351. [2021-06-05 04:40:09,284 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 04:40:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1124 transitions. [2021-06-05 04:40:09,284 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1124 transitions. Word has length 20 [2021-06-05 04:40:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:09,284 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1124 transitions. [2021-06-05 04:40:09,285 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 04:40:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1124 transitions. [2021-06-05 04:40:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:09,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:09,285 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:09,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-06-05 04:40:09,500 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:09,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:09,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1240490427, now seen corresponding path program 63 times [2021-06-05 04:40:09,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:09,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835248178] [2021-06-05 04:40:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:09,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:09,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835248178] [2021-06-05 04:40:09,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835248178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:09,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912582301] [2021-06-05 04:40:09,553 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 04:40:09,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:40:09,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:09,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:09,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:09,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912582301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:09,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:09,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:09,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408711346] [2021-06-05 04:40:09,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:09,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:09,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:09,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:09,786 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 04:40:10,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:10,119 INFO L93 Difference]: Finished difference Result 597 states and 1823 transitions. [2021-06-05 04:40:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:10,119 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 04:40:10,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:10,120 INFO L225 Difference]: With dead ends: 597 [2021-06-05 04:40:10,120 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 04:40:10,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:40:10,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 04:40:10,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 348. [2021-06-05 04:40:10,124 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 04:40:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1113 transitions. [2021-06-05 04:40:10,124 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1113 transitions. Word has length 20 [2021-06-05 04:40:10,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:10,124 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1113 transitions. [2021-06-05 04:40:10,124 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 04:40:10,124 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1113 transitions. [2021-06-05 04:40:10,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:10,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:10,125 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 04:40:10,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable691 [2021-06-05 04:40:10,325 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:10,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:10,326 INFO L82 PathProgramCache]: Analyzing trace with hash -279847627, now seen corresponding path program 64 times [2021-06-05 04:40:10,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:10,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641199498] [2021-06-05 04:40:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:10,389 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 04:40:10,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:10,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641199498] [2021-06-05 04:40:10,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641199498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:10,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457647754] [2021-06-05 04:40:10,389 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 04:40:10,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:10,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:10,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:10,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:10,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457647754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:10,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:10,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:10,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299151470] [2021-06-05 04:40:10,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:10,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:10,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:10,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:10,575 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 04:40:11,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:11,185 INFO L93 Difference]: Finished difference Result 702 states and 2083 transitions. [2021-06-05 04:40:11,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:11,185 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 04:40:11,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:11,186 INFO L225 Difference]: With dead ends: 702 [2021-06-05 04:40:11,186 INFO L226 Difference]: Without dead ends: 702 [2021-06-05 04:40:11,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 609.2ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:40:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-05 04:40:11,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 356. [2021-06-05 04:40:11,191 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 04:40:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 1149 transitions. [2021-06-05 04:40:11,191 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 1149 transitions. Word has length 20 [2021-06-05 04:40:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:11,192 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 1149 transitions. [2021-06-05 04:40:11,192 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 04:40:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 1149 transitions. [2021-06-05 04:40:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:11,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:11,192 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 04:40:11,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 04:40:11,393 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:11,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:11,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1773755349, now seen corresponding path program 65 times [2021-06-05 04:40:11,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:11,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225414305] [2021-06-05 04:40:11,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:11,459 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 04:40:11,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:11,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225414305] [2021-06-05 04:40:11,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225414305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:11,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089864951] [2021-06-05 04:40:11,460 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 04:40:11,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:11,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:11,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:11,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:11,661 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 04:40:11,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089864951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:11,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:11,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:11,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840410372] [2021-06-05 04:40:11,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:11,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:11,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:11,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:11,662 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 04:40:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:12,300 INFO L93 Difference]: Finished difference Result 708 states and 2084 transitions. [2021-06-05 04:40:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:40:12,300 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 04:40:12,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:12,301 INFO L225 Difference]: With dead ends: 708 [2021-06-05 04:40:12,301 INFO L226 Difference]: Without dead ends: 702 [2021-06-05 04:40:12,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 654.3ms TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:40:12,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-05 04:40:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 359. [2021-06-05 04:40:12,306 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 04:40:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1151 transitions. [2021-06-05 04:40:12,306 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1151 transitions. Word has length 20 [2021-06-05 04:40:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:12,307 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1151 transitions. [2021-06-05 04:40:12,307 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 04:40:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1151 transitions. [2021-06-05 04:40:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:12,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:12,307 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:12,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:12,508 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:12,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:12,508 INFO L82 PathProgramCache]: Analyzing trace with hash 471552811, now seen corresponding path program 66 times [2021-06-05 04:40:12,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:12,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289673608] [2021-06-05 04:40:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:12,583 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 04:40:12,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:12,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289673608] [2021-06-05 04:40:12,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289673608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:12,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100282604] [2021-06-05 04:40:12,583 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 04:40:12,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:40:12,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:12,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:12,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:12,776 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 04:40:12,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100282604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:12,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:12,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:12,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016293198] [2021-06-05 04:40:12,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:12,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:12,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:12,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:12,777 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 04:40:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:13,121 INFO L93 Difference]: Finished difference Result 670 states and 2004 transitions. [2021-06-05 04:40:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:13,122 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 04:40:13,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:13,123 INFO L225 Difference]: With dead ends: 670 [2021-06-05 04:40:13,123 INFO L226 Difference]: Without dead ends: 670 [2021-06-05 04:40:13,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 382.3ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:40:13,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-06-05 04:40:13,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 352. [2021-06-05 04:40:13,127 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 04:40:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1133 transitions. [2021-06-05 04:40:13,128 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1133 transitions. Word has length 20 [2021-06-05 04:40:13,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:13,128 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1133 transitions. [2021-06-05 04:40:13,128 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 04:40:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1133 transitions. [2021-06-05 04:40:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:13,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:13,128 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:13,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable721 [2021-06-05 04:40:13,337 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:13,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1763895211, now seen corresponding path program 67 times [2021-06-05 04:40:13,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:13,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771332445] [2021-06-05 04:40:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:13,422 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 04:40:13,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:13,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771332445] [2021-06-05 04:40:13,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771332445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:13,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969271739] [2021-06-05 04:40:13,422 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 04:40:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:13,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:13,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:13,609 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 04:40:13,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969271739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:13,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:13,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:13,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164563051] [2021-06-05 04:40:13,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:13,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:13,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:13,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:13,610 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 04:40:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:13,929 INFO L93 Difference]: Finished difference Result 633 states and 1922 transitions. [2021-06-05 04:40:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:13,929 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 04:40:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:13,930 INFO L225 Difference]: With dead ends: 633 [2021-06-05 04:40:13,930 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 04:40:13,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:40:13,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 04:40:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 349. [2021-06-05 04:40:13,935 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 04:40:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1118 transitions. [2021-06-05 04:40:13,935 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1118 transitions. Word has length 20 [2021-06-05 04:40:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:13,935 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1118 transitions. [2021-06-05 04:40:13,935 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 04:40:13,935 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1118 transitions. [2021-06-05 04:40:13,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:13,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:13,936 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 04:40:14,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:14,149 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:14,149 INFO L82 PathProgramCache]: Analyzing trace with hash 492289339, now seen corresponding path program 68 times [2021-06-05 04:40:14,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:14,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531413308] [2021-06-05 04:40:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:14,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:14,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531413308] [2021-06-05 04:40:14,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531413308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:14,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355568820] [2021-06-05 04:40:14,210 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 04:40:14,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:14,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:14,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:14,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:14,460 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 04:40:14,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355568820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:14,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:14,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:14,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686138789] [2021-06-05 04:40:14,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:14,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:14,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:14,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:14,461 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 04:40:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:15,181 INFO L93 Difference]: Finished difference Result 670 states and 1996 transitions. [2021-06-05 04:40:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:40:15,181 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 04:40:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:15,182 INFO L225 Difference]: With dead ends: 670 [2021-06-05 04:40:15,182 INFO L226 Difference]: Without dead ends: 664 [2021-06-05 04:40:15,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 722.6ms TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:40:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-06-05 04:40:15,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 359. [2021-06-05 04:40:15,186 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 04:40:15,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1145 transitions. [2021-06-05 04:40:15,187 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1145 transitions. Word has length 20 [2021-06-05 04:40:15,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:15,187 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1145 transitions. [2021-06-05 04:40:15,187 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 04:40:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1145 transitions. [2021-06-05 04:40:15,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:15,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:15,188 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 04:40:15,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-05 04:40:15,388 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:15,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:15,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1423134587, now seen corresponding path program 69 times [2021-06-05 04:40:15,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:15,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404393103] [2021-06-05 04:40:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:15,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:15,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404393103] [2021-06-05 04:40:15,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404393103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:15,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648413877] [2021-06-05 04:40:15,477 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 04:40:15,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:40:15,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:15,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:15,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:15,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648413877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:15,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:15,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:15,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267885273] [2021-06-05 04:40:15,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:15,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:15,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:15,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:15,676 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 04:40:16,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:16,174 INFO L93 Difference]: Finished difference Result 647 states and 1957 transitions. [2021-06-05 04:40:16,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:16,174 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 04:40:16,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:16,175 INFO L225 Difference]: With dead ends: 647 [2021-06-05 04:40:16,175 INFO L226 Difference]: Without dead ends: 647 [2021-06-05 04:40:16,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 536.1ms TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:40:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-05 04:40:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 348. [2021-06-05 04:40:16,179 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 04:40:16,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1113 transitions. [2021-06-05 04:40:16,180 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1113 transitions. Word has length 20 [2021-06-05 04:40:16,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:16,180 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1113 transitions. [2021-06-05 04:40:16,180 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 04:40:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1113 transitions. [2021-06-05 04:40:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:16,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:16,181 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:16,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-06-05 04:40:16,381 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:16,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:16,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1526568277, now seen corresponding path program 70 times [2021-06-05 04:40:16,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:16,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157782877] [2021-06-05 04:40:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:16,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:16,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157782877] [2021-06-05 04:40:16,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157782877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:16,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69148954] [2021-06-05 04:40:16,440 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 04:40:16,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:16,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:16,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:16,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69148954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:16,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:16,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:16,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918926005] [2021-06-05 04:40:16,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:16,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:16,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:16,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:16,639 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 04:40:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:16,989 INFO L93 Difference]: Finished difference Result 589 states and 1801 transitions. [2021-06-05 04:40:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:16,989 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 04:40:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:16,990 INFO L225 Difference]: With dead ends: 589 [2021-06-05 04:40:16,990 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 04:40:16,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:40:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 04:40:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 350. [2021-06-05 04:40:16,994 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 04:40:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1118 transitions. [2021-06-05 04:40:16,994 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1118 transitions. Word has length 20 [2021-06-05 04:40:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:16,994 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1118 transitions. [2021-06-05 04:40:16,995 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 04:40:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1118 transitions. [2021-06-05 04:40:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:16,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:16,995 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:17,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:17,200 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:17,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:17,201 INFO L82 PathProgramCache]: Analyzing trace with hash -775167839, now seen corresponding path program 71 times [2021-06-05 04:40:17,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:17,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180739678] [2021-06-05 04:40:17,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:17,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:17,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180739678] [2021-06-05 04:40:17,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180739678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:17,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865566959] [2021-06-05 04:40:17,261 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 04:40:17,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:17,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:17,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:17,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:17,466 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 04:40:17,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865566959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:17,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:17,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:17,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981262549] [2021-06-05 04:40:17,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:17,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:17,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:17,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:17,467 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 04:40:18,034 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 04:40:18,159 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 04:40:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:18,167 INFO L93 Difference]: Finished difference Result 614 states and 1853 transitions. [2021-06-05 04:40:18,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:18,168 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 04:40:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:18,168 INFO L225 Difference]: With dead ends: 614 [2021-06-05 04:40:18,168 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 04:40:18,169 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 04:40:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 04:40:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 360. [2021-06-05 04:40:18,173 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 04:40:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1145 transitions. [2021-06-05 04:40:18,173 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1145 transitions. Word has length 20 [2021-06-05 04:40:18,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:18,173 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1145 transitions. [2021-06-05 04:40:18,173 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 04:40:18,173 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1145 transitions. [2021-06-05 04:40:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:18,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:18,174 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:18,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:18,374 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:18,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:18,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1604375531, now seen corresponding path program 72 times [2021-06-05 04:40:18,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:18,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475301350] [2021-06-05 04:40:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:18,438 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 04:40:18,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:18,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475301350] [2021-06-05 04:40:18,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475301350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:18,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562102526] [2021-06-05 04:40:18,439 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 04:40:18,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:40:18,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:18,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:18,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:18,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562102526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:18,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:18,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:18,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739773417] [2021-06-05 04:40:18,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:18,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:18,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:18,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:18,641 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 04:40:19,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:19,062 INFO L93 Difference]: Finished difference Result 585 states and 1799 transitions. [2021-06-05 04:40:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:19,062 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 04:40:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:19,063 INFO L225 Difference]: With dead ends: 585 [2021-06-05 04:40:19,063 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 04:40:19,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:40:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 04:40:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 347. [2021-06-05 04:40:19,067 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 04:40:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1108 transitions. [2021-06-05 04:40:19,068 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1108 transitions. Word has length 20 [2021-06-05 04:40:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:19,068 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1108 transitions. [2021-06-05 04:40:19,068 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 04:40:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1108 transitions. [2021-06-05 04:40:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:19,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:19,068 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 04:40:19,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-06-05 04:40:19,269 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash -304735173, now seen corresponding path program 73 times [2021-06-05 04:40:19,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:19,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504600157] [2021-06-05 04:40:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:19,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:19,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504600157] [2021-06-05 04:40:19,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504600157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:19,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937156292] [2021-06-05 04:40:19,321 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 04:40:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:19,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:19,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:19,482 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 04:40:19,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937156292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:19,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:19,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:19,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661499778] [2021-06-05 04:40:19,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:19,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:19,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:19,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:19,483 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 04:40:19,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:19,856 INFO L93 Difference]: Finished difference Result 612 states and 1839 transitions. [2021-06-05 04:40:19,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:19,856 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 04:40:19,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:19,857 INFO L225 Difference]: With dead ends: 612 [2021-06-05 04:40:19,857 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 04:40:19,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:40:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 04:40:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 349. [2021-06-05 04:40:19,861 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 04:40:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1113 transitions. [2021-06-05 04:40:19,862 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1113 transitions. Word has length 20 [2021-06-05 04:40:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:19,862 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1113 transitions. [2021-06-05 04:40:19,862 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 04:40:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1113 transitions. [2021-06-05 04:40:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:19,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:19,862 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:20,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable789,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:20,063 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:20,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:20,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1707620929, now seen corresponding path program 74 times [2021-06-05 04:40:20,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:20,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103456372] [2021-06-05 04:40:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:20,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:20,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103456372] [2021-06-05 04:40:20,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103456372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:20,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022251603] [2021-06-05 04:40:20,128 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 04:40:20,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:20,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:20,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:20,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:20,320 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 04:40:20,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022251603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:20,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:20,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:20,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720534527] [2021-06-05 04:40:20,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:20,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:20,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:20,321 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 04:40:20,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:20,682 INFO L93 Difference]: Finished difference Result 571 states and 1753 transitions. [2021-06-05 04:40:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:20,682 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 04:40:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:20,683 INFO L225 Difference]: With dead ends: 571 [2021-06-05 04:40:20,683 INFO L226 Difference]: Without dead ends: 559 [2021-06-05 04:40:20,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:40:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-05 04:40:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 351. [2021-06-05 04:40:20,687 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 04:40:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1118 transitions. [2021-06-05 04:40:20,688 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1118 transitions. Word has length 20 [2021-06-05 04:40:20,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:20,688 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1118 transitions. [2021-06-05 04:40:20,688 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 04:40:20,688 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1118 transitions. [2021-06-05 04:40:20,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:20,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:20,688 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 04:40:20,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 04:40:20,889 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:20,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1835945929, now seen corresponding path program 75 times [2021-06-05 04:40:20,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:20,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460023956] [2021-06-05 04:40:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:20,946 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 04:40:20,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:20,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460023956] [2021-06-05 04:40:20,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460023956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:20,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993509233] [2021-06-05 04:40:20,946 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 04:40:20,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:40:20,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:20,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:20,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:21,121 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 04:40:21,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993509233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:21,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:21,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:21,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236735923] [2021-06-05 04:40:21,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:21,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:21,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:21,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:21,122 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 04:40:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:21,728 INFO L93 Difference]: Finished difference Result 594 states and 1798 transitions. [2021-06-05 04:40:21,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:21,728 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 04:40:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:21,729 INFO L225 Difference]: With dead ends: 594 [2021-06-05 04:40:21,729 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 04:40:21,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 611.9ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:40:21,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 04:40:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 361. [2021-06-05 04:40:21,733 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 04:40:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1145 transitions. [2021-06-05 04:40:21,734 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1145 transitions. Word has length 20 [2021-06-05 04:40:21,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:21,734 INFO L482 AbstractCegarLoop]: Abstraction has 361 states and 1145 transitions. [2021-06-05 04:40:21,734 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 04:40:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1145 transitions. [2021-06-05 04:40:21,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:21,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:21,735 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 04:40:21,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-06-05 04:40:21,936 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:21,936 INFO L82 PathProgramCache]: Analyzing trace with hash 543597441, now seen corresponding path program 76 times [2021-06-05 04:40:21,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:21,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757241183] [2021-06-05 04:40:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:21,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:21,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757241183] [2021-06-05 04:40:21,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757241183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:21,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824245658] [2021-06-05 04:40:21,995 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 04:40:22,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:22,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:22,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:22,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:22,181 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 04:40:22,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824245658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:22,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:22,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:22,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887620236] [2021-06-05 04:40:22,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:22,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:22,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:22,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:22,183 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 04:40:22,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:22,653 INFO L93 Difference]: Finished difference Result 565 states and 1744 transitions. [2021-06-05 04:40:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:22,653 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 04:40:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:22,654 INFO L225 Difference]: With dead ends: 565 [2021-06-05 04:40:22,654 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 04:40:22,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:40:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 04:40:22,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 349. [2021-06-05 04:40:22,658 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 04:40:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1113 transitions. [2021-06-05 04:40:22,659 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1113 transitions. Word has length 20 [2021-06-05 04:40:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:22,659 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1113 transitions. [2021-06-05 04:40:22,659 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 04:40:22,659 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1113 transitions. [2021-06-05 04:40:22,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:22,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:22,659 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:22,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:22,870 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:22,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:22,870 INFO L82 PathProgramCache]: Analyzing trace with hash -942811430, now seen corresponding path program 77 times [2021-06-05 04:40:22,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:22,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607935174] [2021-06-05 04:40:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:22,925 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 04:40:22,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:22,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607935174] [2021-06-05 04:40:22,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607935174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:22,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497072476] [2021-06-05 04:40:22,925 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 04:40:22,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:40:22,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:22,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:22,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:23,022 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 12 treesize of output 8 [2021-06-05 04:40:23,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:23,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:23,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:23,039 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:40:23,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:23,039 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:40:23,074 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 04:40:23,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497072476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:23,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:23,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 04:40:23,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337826862] [2021-06-05 04:40:23,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:23,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:23,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:23,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:23,075 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 04:40:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:23,269 INFO L93 Difference]: Finished difference Result 493 states and 1515 transitions. [2021-06-05 04:40:23,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:23,269 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 04:40:23,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:23,270 INFO L225 Difference]: With dead ends: 493 [2021-06-05 04:40:23,270 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 04:40:23,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 04:40:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 339. [2021-06-05 04:40:23,273 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 04:40:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-06-05 04:40:23,274 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-06-05 04:40:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:23,274 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-06-05 04:40:23,274 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 04:40:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-06-05 04:40:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:23,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:23,275 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:23,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable825,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:23,480 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:23,480 INFO L82 PathProgramCache]: Analyzing trace with hash -350392803, now seen corresponding path program 78 times [2021-06-05 04:40:23,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:23,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887279944] [2021-06-05 04:40:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:23,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:23,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887279944] [2021-06-05 04:40:23,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887279944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:23,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828230957] [2021-06-05 04:40:23,525 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 04:40:23,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:40:23,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:23,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:23,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:40:23,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:23,649 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 12 treesize of output 8 [2021-06-05 04:40:23,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:23,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:23,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:23,652 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-06-05 04:40:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:23,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828230957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:23,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:23,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:23,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869892510] [2021-06-05 04:40:23,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:23,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:23,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:23,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:23,669 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 04:40:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:23,771 INFO L93 Difference]: Finished difference Result 438 states and 1322 transitions. [2021-06-05 04:40:23,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:23,771 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 04:40:23,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:23,772 INFO L225 Difference]: With dead ends: 438 [2021-06-05 04:40:23,772 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 04:40:23,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 04:40:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 349. [2021-06-05 04:40:23,775 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 04:40:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2021-06-05 04:40:23,776 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 20 [2021-06-05 04:40:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:23,776 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2021-06-05 04:40:23,776 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 04:40:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2021-06-05 04:40:23,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:23,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:23,777 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 04:40:23,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable829,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:23,997 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:23,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:23,997 INFO L82 PathProgramCache]: Analyzing trace with hash 808250727, now seen corresponding path program 79 times [2021-06-05 04:40:23,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:23,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314312780] [2021-06-05 04:40:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:24,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:24,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314312780] [2021-06-05 04:40:24,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314312780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:24,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214665240] [2021-06-05 04:40:24,041 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 04:40:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:24,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:24,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:24,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:40:24,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:24,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:24,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:24,156 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 04:40:24,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:24,157 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 04:40:24,177 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 04:40:24,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214665240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:24,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:24,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:24,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194501447] [2021-06-05 04:40:24,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:24,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:24,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:24,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:24,178 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 04:40:24,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:24,329 INFO L93 Difference]: Finished difference Result 490 states and 1443 transitions. [2021-06-05 04:40:24,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:24,329 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 04:40:24,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:24,330 INFO L225 Difference]: With dead ends: 490 [2021-06-05 04:40:24,330 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 04:40:24,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 04:40:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-06-05 04:40:24,334 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 04:40:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1105 transitions. [2021-06-05 04:40:24,334 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1105 transitions. Word has length 20 [2021-06-05 04:40:24,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:24,334 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1105 transitions. [2021-06-05 04:40:24,334 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 04:40:24,334 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1105 transitions. [2021-06-05 04:40:24,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:24,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:24,335 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:24,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable836,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:24,535 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:24,536 INFO L82 PathProgramCache]: Analyzing trace with hash -685656995, now seen corresponding path program 80 times [2021-06-05 04:40:24,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:24,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46022422] [2021-06-05 04:40:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:24,573 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 04:40:24,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:24,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46022422] [2021-06-05 04:40:24,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46022422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:24,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676188505] [2021-06-05 04:40:24,573 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 04:40:24,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:24,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:24,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:24,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:24,717 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 12 treesize of output 8 [2021-06-05 04:40:24,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:24,725 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 04:40:24,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:24,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 04:40:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:24,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676188505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:24,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:24,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:24,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35420431] [2021-06-05 04:40:24,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:24,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:24,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:24,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:24,755 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 04:40:24,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:24,883 INFO L93 Difference]: Finished difference Result 447 states and 1340 transitions. [2021-06-05 04:40:24,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:24,883 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 04:40:24,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:24,884 INFO L225 Difference]: With dead ends: 447 [2021-06-05 04:40:24,884 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 04:40:24,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:24,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 04:40:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 344. [2021-06-05 04:40:24,887 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 04:40:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1081 transitions. [2021-06-05 04:40:24,888 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1081 transitions. Word has length 20 [2021-06-05 04:40:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:24,888 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1081 transitions. [2021-06-05 04:40:24,888 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 04:40:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1081 transitions. [2021-06-05 04:40:24,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:24,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:24,888 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 04:40:25,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:25,089 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:25,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1902342315, now seen corresponding path program 81 times [2021-06-05 04:40:25,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:25,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748730449] [2021-06-05 04:40:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:25,152 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 04:40:25,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:25,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748730449] [2021-06-05 04:40:25,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748730449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:25,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334476490] [2021-06-05 04:40:25,152 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 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 04:40:25,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:40:25,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:25,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:25,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:25,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334476490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:25,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:25,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:25,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335389348] [2021-06-05 04:40:25,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:25,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:25,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:25,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:25,313 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 04:40:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:25,512 INFO L93 Difference]: Finished difference Result 416 states and 1256 transitions. [2021-06-05 04:40:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:25,512 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 04:40:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:25,513 INFO L225 Difference]: With dead ends: 416 [2021-06-05 04:40:25,513 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 04:40:25,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 04:40:25,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 350. [2021-06-05 04:40:25,516 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 04:40:25,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1103 transitions. [2021-06-05 04:40:25,517 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1103 transitions. Word has length 20 [2021-06-05 04:40:25,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:25,517 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1103 transitions. [2021-06-05 04:40:25,517 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 04:40:25,517 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1103 transitions. [2021-06-05 04:40:25,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:25,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:25,518 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 04:40:25,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable853,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:25,734 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:25,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:25,734 INFO L82 PathProgramCache]: Analyzing trace with hash 408434593, now seen corresponding path program 82 times [2021-06-05 04:40:25,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:25,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155350487] [2021-06-05 04:40:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:25,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:25,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155350487] [2021-06-05 04:40:25,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155350487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:25,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911565497] [2021-06-05 04:40:25,779 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 04:40:25,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:25,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:25,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:25,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911565497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:25,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:25,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:25,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207726055] [2021-06-05 04:40:25,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:25,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:25,930 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 04:40:26,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:26,111 INFO L93 Difference]: Finished difference Result 422 states and 1263 transitions. [2021-06-05 04:40:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:40:26,111 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 04:40:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:26,112 INFO L225 Difference]: With dead ends: 422 [2021-06-05 04:40:26,112 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 04:40:26,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:40:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 04:40:26,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 347. [2021-06-05 04:40:26,116 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 04:40:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1092 transitions. [2021-06-05 04:40:26,117 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1092 transitions. Word has length 20 [2021-06-05 04:40:26,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:26,117 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1092 transitions. [2021-06-05 04:40:26,117 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 04:40:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1092 transitions. [2021-06-05 04:40:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:26,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:26,118 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:26,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-06-05 04:40:26,318 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:26,318 INFO L82 PathProgramCache]: Analyzing trace with hash 946290171, now seen corresponding path program 83 times [2021-06-05 04:40:26,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:26,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707466716] [2021-06-05 04:40:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:26,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:26,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707466716] [2021-06-05 04:40:26,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707466716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:26,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761608568] [2021-06-05 04:40:26,379 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 04:40:26,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:26,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:26,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:26,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:26,538 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 04:40:26,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761608568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:26,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:26,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:26,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610945999] [2021-06-05 04:40:26,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:26,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:26,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:26,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:26,539 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 04:40:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:26,777 INFO L93 Difference]: Finished difference Result 380 states and 1168 transitions. [2021-06-05 04:40:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:26,778 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 04:40:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:26,778 INFO L225 Difference]: With dead ends: 380 [2021-06-05 04:40:26,778 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 04:40:26,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 04:40:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 339. [2021-06-05 04:40:26,781 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 04:40:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-06-05 04:40:26,782 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-06-05 04:40:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:26,782 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-06-05 04:40:26,782 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 04:40:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-06-05 04:40:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:26,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:26,783 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:26,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-06-05 04:40:26,983 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:26,984 INFO L82 PathProgramCache]: Analyzing trace with hash -818452776, now seen corresponding path program 84 times [2021-06-05 04:40:26,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:26,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084863581] [2021-06-05 04:40:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:27,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:27,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084863581] [2021-06-05 04:40:27,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084863581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:27,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700302108] [2021-06-05 04:40:27,068 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 04:40:27,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:40:27,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:27,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:27,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:27,196 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 04:40:27,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:27,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:27,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:27,222 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 04:40:27,225 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 04:40:27,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:27,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:27,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:27,234 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 04:40:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:27,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700302108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:27,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:27,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 04:40:27,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588373616] [2021-06-05 04:40:27,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:27,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:27,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:27,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:27,291 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 04:40:27,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:27,526 INFO L93 Difference]: Finished difference Result 550 states and 1646 transitions. [2021-06-05 04:40:27,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:27,527 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 04:40:27,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:27,527 INFO L225 Difference]: With dead ends: 550 [2021-06-05 04:40:27,527 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 04:40:27,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:40:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 04:40:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 339. [2021-06-05 04:40:27,531 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 04:40:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1068 transitions. [2021-06-05 04:40:27,532 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1068 transitions. Word has length 20 [2021-06-05 04:40:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:27,532 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1068 transitions. [2021-06-05 04:40:27,532 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 04:40:27,532 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1068 transitions. [2021-06-05 04:40:27,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:27,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:27,532 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:27,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable880 [2021-06-05 04:40:27,733 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:27,733 INFO L82 PathProgramCache]: Analyzing trace with hash 190922387, now seen corresponding path program 85 times [2021-06-05 04:40:27,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:27,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648196678] [2021-06-05 04:40:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:27,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:27,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648196678] [2021-06-05 04:40:27,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648196678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:27,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732666749] [2021-06-05 04:40:27,778 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 04:40:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:27,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:27,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:27,889 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 5 treesize of output 3 [2021-06-05 04:40:27,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:27,892 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 04:40:27,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:27,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:27,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:27,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:27,914 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 04:40:27,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:27,933 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:40:27,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:27,934 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:40:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:27,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732666749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:27,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:27,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:27,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721076610] [2021-06-05 04:40:27,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:27,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:27,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:27,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:27,972 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 04:40:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:28,193 INFO L93 Difference]: Finished difference Result 591 states and 1730 transitions. [2021-06-05 04:40:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:28,193 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 04:40:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:28,194 INFO L225 Difference]: With dead ends: 591 [2021-06-05 04:40:28,194 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 04:40:28,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:40:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 04:40:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 351. [2021-06-05 04:40:28,199 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 04:40:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1109 transitions. [2021-06-05 04:40:28,200 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1109 transitions. Word has length 20 [2021-06-05 04:40:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:28,200 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1109 transitions. [2021-06-05 04:40:28,200 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 04:40:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1109 transitions. [2021-06-05 04:40:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:28,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:28,200 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 04:40:28,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable891,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:28,401 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:28,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:28,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1349565917, now seen corresponding path program 86 times [2021-06-05 04:40:28,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:28,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585145856] [2021-06-05 04:40:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:28,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:28,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585145856] [2021-06-05 04:40:28,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585145856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:28,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632348986] [2021-06-05 04:40:28,450 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 04:40:28,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:28,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:28,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:28,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:28,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:28,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:28,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:28,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:28,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:28,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:28,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:28,587 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 13 treesize of output 9 [2021-06-05 04:40:28,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:28,610 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:40:28,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:28,610 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:40:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:28,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632348986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:28,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:28,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:28,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403120161] [2021-06-05 04:40:28,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:28,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:28,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:28,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:28,666 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 04:40:28,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:28,818 INFO L93 Difference]: Finished difference Result 643 states and 1851 transitions. [2021-06-05 04:40:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:28,818 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 04:40:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:28,819 INFO L225 Difference]: With dead ends: 643 [2021-06-05 04:40:28,819 INFO L226 Difference]: Without dead ends: 643 [2021-06-05 04:40:28,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-05 04:40:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 357. [2021-06-05 04:40:28,823 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 04:40:28,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1134 transitions. [2021-06-05 04:40:28,824 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1134 transitions. Word has length 20 [2021-06-05 04:40:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:28,824 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1134 transitions. [2021-06-05 04:40:28,824 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 04:40:28,824 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1134 transitions. [2021-06-05 04:40:28,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:28,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:28,825 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 04:40:29,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable903,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:29,035 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:29,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:29,036 INFO L82 PathProgramCache]: Analyzing trace with hash -144341805, now seen corresponding path program 87 times [2021-06-05 04:40:29,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:29,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495286440] [2021-06-05 04:40:29,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:29,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:29,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495286440] [2021-06-05 04:40:29,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495286440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:29,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370573266] [2021-06-05 04:40:29,085 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 04:40:29,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:40:29,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:29,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:29,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:29,185 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 6 treesize of output 4 [2021-06-05 04:40:29,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:29,219 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-06-05 04:40:29,219 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:40:29,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:29,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:29,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:29,224 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:29,241 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:40:29,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:29,241 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 04:40:29,281 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 04:40:29,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370573266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:29,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:29,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:29,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038729972] [2021-06-05 04:40:29,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:29,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:29,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:29,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:29,282 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 04:40:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:29,459 INFO L93 Difference]: Finished difference Result 600 states and 1742 transitions. [2021-06-05 04:40:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:29,459 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 04:40:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:29,460 INFO L225 Difference]: With dead ends: 600 [2021-06-05 04:40:29,460 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 04:40:29,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:29,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 04:40:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 355. [2021-06-05 04:40:29,464 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 04:40:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1123 transitions. [2021-06-05 04:40:29,464 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1123 transitions. Word has length 20 [2021-06-05 04:40:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:29,464 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1123 transitions. [2021-06-05 04:40:29,464 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 04:40:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1123 transitions. [2021-06-05 04:40:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:29,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:29,465 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:29,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:29,666 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:29,666 INFO L82 PathProgramCache]: Analyzing trace with hash 601434872, now seen corresponding path program 88 times [2021-06-05 04:40:29,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:29,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050687822] [2021-06-05 04:40:29,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:29,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:29,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050687822] [2021-06-05 04:40:29,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050687822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:29,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209856478] [2021-06-05 04:40:29,703 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 04:40:29,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:29,785 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 12 treesize of output 8 [2021-06-05 04:40:29,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:29,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:40:29,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:29,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:29,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:29,794 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 04:40:29,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:29,813 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 04:40:29,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:29,814 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-06-05 04:40:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:29,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209856478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:29,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:29,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 04:40:29,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726521231] [2021-06-05 04:40:29,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:29,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:29,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:29,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:29,867 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 04:40:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:30,075 INFO L93 Difference]: Finished difference Result 483 states and 1462 transitions. [2021-06-05 04:40:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:30,075 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 04:40:30,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:30,076 INFO L225 Difference]: With dead ends: 483 [2021-06-05 04:40:30,076 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 04:40:30,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:40:30,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 04:40:30,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 349. [2021-06-05 04:40:30,079 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 04:40:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2021-06-05 04:40:30,080 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 20 [2021-06-05 04:40:30,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:30,080 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2021-06-05 04:40:30,080 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 04:40:30,080 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2021-06-05 04:40:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:30,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:30,080 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:30,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:30,281 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:30,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:30,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2009499485, now seen corresponding path program 89 times [2021-06-05 04:40:30,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:30,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751573139] [2021-06-05 04:40:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:30,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:30,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751573139] [2021-06-05 04:40:30,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751573139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:30,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021416939] [2021-06-05 04:40:30,335 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 04:40:30,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:40:30,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:30,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:30,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:30,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:30,460 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 13 treesize of output 9 [2021-06-05 04:40:30,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:30,483 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 04:40:30,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:30,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:30,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:30,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:30,494 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:40:30,543 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 04:40:30,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021416939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:30,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:30,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:30,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64582467] [2021-06-05 04:40:30,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:30,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:30,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:30,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:30,544 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 04:40:30,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:30,690 INFO L93 Difference]: Finished difference Result 544 states and 1608 transitions. [2021-06-05 04:40:30,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:30,691 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 04:40:30,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:30,691 INFO L225 Difference]: With dead ends: 544 [2021-06-05 04:40:30,691 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 04:40:30,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 04:40:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 339. [2021-06-05 04:40:30,695 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 04:40:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1063 transitions. [2021-06-05 04:40:30,696 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1063 transitions. Word has length 20 [2021-06-05 04:40:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:30,696 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1063 transitions. [2021-06-05 04:40:30,696 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 04:40:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1063 transitions. [2021-06-05 04:40:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:30,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:30,696 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:30,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-05 04:40:30,902 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:30,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:30,903 INFO L82 PathProgramCache]: Analyzing trace with hash -652416419, now seen corresponding path program 90 times [2021-06-05 04:40:30,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:30,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153434871] [2021-06-05 04:40:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:30,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:30,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:30,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:30,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153434871] [2021-06-05 04:40:30,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153434871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:30,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364137006] [2021-06-05 04:40:30,953 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 04:40:30,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:40:30,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:30,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:30,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:31,066 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 12 treesize of output 8 [2021-06-05 04:40:31,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:31,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:31,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:31,110 INFO L628 ElimStorePlain]: treesize reduction 14, result has 78.1 percent of original size [2021-06-05 04:40:31,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:31,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:31,142 INFO L628 ElimStorePlain]: treesize reduction 9, result has 79.1 percent of original size [2021-06-05 04:40:31,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:31,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:31,163 INFO L628 ElimStorePlain]: treesize reduction 8, result has 71.4 percent of original size [2021-06-05 04:40:31,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:31,164 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 04:40:31,229 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 04:40:31,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364137006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:31,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:31,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:31,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73804437] [2021-06-05 04:40:31,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:31,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:31,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:31,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:31,230 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 04:40:31,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:31,487 INFO L93 Difference]: Finished difference Result 540 states and 1592 transitions. [2021-06-05 04:40:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:31,487 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 04:40:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:31,488 INFO L225 Difference]: With dead ends: 540 [2021-06-05 04:40:31,488 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 04:40:31,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:40:31,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 04:40:31,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 342. [2021-06-05 04:40:31,492 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 04:40:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1078 transitions. [2021-06-05 04:40:31,492 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1078 transitions. Word has length 20 [2021-06-05 04:40:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:31,493 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1078 transitions. [2021-06-05 04:40:31,493 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 04:40:31,493 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1078 transitions. [2021-06-05 04:40:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:31,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:31,493 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 04:40:31,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-05 04:40:31,694 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:31,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:31,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1685413921, now seen corresponding path program 91 times [2021-06-05 04:40:31,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:31,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011762531] [2021-06-05 04:40:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:31,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:31,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011762531] [2021-06-05 04:40:31,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011762531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:31,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901144271] [2021-06-05 04:40:31,748 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 04:40:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:31,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:31,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:31,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:40:31,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:31,847 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 12 treesize of output 8 [2021-06-05 04:40:31,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:31,889 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.6 percent of original size [2021-06-05 04:40:31,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:31,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:31,925 INFO L628 ElimStorePlain]: treesize reduction 17, result has 66.0 percent of original size [2021-06-05 04:40:31,926 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 13 treesize of output 9 [2021-06-05 04:40:31,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:31,944 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:40:31,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:31,945 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-06-05 04:40:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:32,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901144271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:32,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:32,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:32,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976669479] [2021-06-05 04:40:32,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:32,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:32,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:32,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:32,007 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 04:40:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:32,143 INFO L93 Difference]: Finished difference Result 478 states and 1449 transitions. [2021-06-05 04:40:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:32,143 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 04:40:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:32,144 INFO L225 Difference]: With dead ends: 478 [2021-06-05 04:40:32,144 INFO L226 Difference]: Without dead ends: 478 [2021-06-05 04:40:32,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:32,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-05 04:40:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 333. [2021-06-05 04:40:32,148 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 04:40:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1039 transitions. [2021-06-05 04:40:32,148 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1039 transitions. Word has length 20 [2021-06-05 04:40:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:32,148 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1039 transitions. [2021-06-05 04:40:32,148 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 04:40:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1039 transitions. [2021-06-05 04:40:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:32,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:32,149 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:32,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable966 [2021-06-05 04:40:32,349 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:32,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1320603285, now seen corresponding path program 92 times [2021-06-05 04:40:32,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:32,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989399048] [2021-06-05 04:40:32,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:32,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:32,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989399048] [2021-06-05 04:40:32,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989399048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:32,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296121931] [2021-06-05 04:40:32,410 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 04:40:32,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:32,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:32,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:32,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:32,508 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 6 treesize of output 4 [2021-06-05 04:40:32,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:32,539 INFO L628 ElimStorePlain]: treesize reduction 30, result has 57.1 percent of original size [2021-06-05 04:40:32,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:32,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:32,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:32,555 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 13 treesize of output 9 [2021-06-05 04:40:32,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:32,573 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:40:32,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:32,573 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:76, output treesize:20 [2021-06-05 04:40:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:32,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296121931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:32,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:32,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:32,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946978497] [2021-06-05 04:40:32,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:32,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:32,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:32,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:32,645 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 04:40:32,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:32,878 INFO L93 Difference]: Finished difference Result 588 states and 1733 transitions. [2021-06-05 04:40:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:32,878 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 04:40:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:32,879 INFO L225 Difference]: With dead ends: 588 [2021-06-05 04:40:32,879 INFO L226 Difference]: Without dead ends: 588 [2021-06-05 04:40:32,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-05 04:40:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 341. [2021-06-05 04:40:32,883 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 04:40:32,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1075 transitions. [2021-06-05 04:40:32,884 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1075 transitions. Word has length 20 [2021-06-05 04:40:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:32,884 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1075 transitions. [2021-06-05 04:40:32,884 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 04:40:32,884 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1075 transitions. [2021-06-05 04:40:32,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:32,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:32,884 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:33,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable975,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:33,085 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:33,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:33,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1480456289, now seen corresponding path program 93 times [2021-06-05 04:40:33,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:33,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301085826] [2021-06-05 04:40:33,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:33,135 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 04:40:33,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:33,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301085826] [2021-06-05 04:40:33,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301085826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:33,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038944167] [2021-06-05 04:40:33,135 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 04:40:33,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:40:33,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:33,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:33,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:33,230 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 04:40:33,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:33,263 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-06-05 04:40:33,265 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 04:40:33,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:33,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:33,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:33,285 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:40:33,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:33,286 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-06-05 04:40:33,355 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 04:40:33,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038944167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:33,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:33,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:33,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758772051] [2021-06-05 04:40:33,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:33,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:33,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:33,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:33,356 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 04:40:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:33,599 INFO L93 Difference]: Finished difference Result 574 states and 1682 transitions. [2021-06-05 04:40:33,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:33,599 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 04:40:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:33,600 INFO L225 Difference]: With dead ends: 574 [2021-06-05 04:40:33,600 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 04:40:33,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:33,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 04:40:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 344. [2021-06-05 04:40:33,604 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 04:40:33,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1077 transitions. [2021-06-05 04:40:33,605 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1077 transitions. Word has length 20 [2021-06-05 04:40:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:33,605 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1077 transitions. [2021-06-05 04:40:33,605 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 04:40:33,605 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1077 transitions. [2021-06-05 04:40:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:33,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:33,605 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:33,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable985,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:33,806 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:33,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:33,806 INFO L82 PathProgramCache]: Analyzing trace with hash -569202847, now seen corresponding path program 94 times [2021-06-05 04:40:33,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:33,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378442311] [2021-06-05 04:40:33,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:33,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:33,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378442311] [2021-06-05 04:40:33,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378442311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:33,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106540085] [2021-06-05 04:40:33,872 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 04:40:33,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:33,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:33,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:33,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:33,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:40:33,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:33,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:33,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:34,011 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-06-05 04:40:34,013 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 04:40:34,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:34,016 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 04:40:34,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:34,035 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:40:34,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:34,036 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 04:40:34,110 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 04:40:34,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106540085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:34,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:34,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:34,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394821198] [2021-06-05 04:40:34,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:34,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:34,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:34,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:34,111 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 04:40:34,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:34,433 INFO L93 Difference]: Finished difference Result 619 states and 1797 transitions. [2021-06-05 04:40:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:34,434 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 04:40:34,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:34,434 INFO L225 Difference]: With dead ends: 619 [2021-06-05 04:40:34,434 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 04:40:34,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:40:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 04:40:34,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 337. [2021-06-05 04:40:34,439 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 04:40:34,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1059 transitions. [2021-06-05 04:40:34,439 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1059 transitions. Word has length 20 [2021-06-05 04:40:34,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:34,439 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1059 transitions. [2021-06-05 04:40:34,439 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 04:40:34,439 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1059 transitions. [2021-06-05 04:40:34,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:34,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:34,440 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 04:40:34,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-06-05 04:40:34,640 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:34,641 INFO L82 PathProgramCache]: Analyzing trace with hash 723139553, now seen corresponding path program 95 times [2021-06-05 04:40:34,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:34,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225154984] [2021-06-05 04:40:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:34,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:34,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225154984] [2021-06-05 04:40:34,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225154984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:34,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620038317] [2021-06-05 04:40:34,695 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 04:40:34,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:40:34,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:34,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:34,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:34,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:34,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:34,826 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-06-05 04:40:34,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:34,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:34,831 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 13 treesize of output 9 [2021-06-05 04:40:34,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:34,848 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:40:34,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:34,849 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-06-05 04:40:34,918 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 04:40:34,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620038317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:34,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:34,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:34,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415469727] [2021-06-05 04:40:34,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:34,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:34,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:34,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:34,919 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 04:40:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:35,128 INFO L93 Difference]: Finished difference Result 553 states and 1649 transitions. [2021-06-05 04:40:35,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:35,128 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 04:40:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:35,129 INFO L225 Difference]: With dead ends: 553 [2021-06-05 04:40:35,129 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 04:40:35,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:35,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 04:40:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 334. [2021-06-05 04:40:35,134 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 04:40:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1044 transitions. [2021-06-05 04:40:35,135 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1044 transitions. Word has length 20 [2021-06-05 04:40:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:35,135 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1044 transitions. [2021-06-05 04:40:35,135 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 04:40:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1044 transitions. [2021-06-05 04:40:35,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:35,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:35,135 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:35,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-06-05 04:40:35,353 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:35,353 INFO L82 PathProgramCache]: Analyzing trace with hash -548466319, now seen corresponding path program 96 times [2021-06-05 04:40:35,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:35,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441225338] [2021-06-05 04:40:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:35,403 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 04:40:35,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:35,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441225338] [2021-06-05 04:40:35,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441225338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:35,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382190852] [2021-06-05 04:40:35,403 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 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 04:40:35,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:40:35,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:35,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:35,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:35,551 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 6 treesize of output 4 [2021-06-05 04:40:35,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:35,555 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 13 treesize of output 9 [2021-06-05 04:40:35,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:35,584 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-06-05 04:40:35,586 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 04:40:35,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:35,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:35,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:35,598 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 04:40:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:35,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382190852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:35,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:35,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:35,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267075011] [2021-06-05 04:40:35,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:35,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:35,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:35,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:35,682 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 04:40:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:35,963 INFO L93 Difference]: Finished difference Result 525 states and 1551 transitions. [2021-06-05 04:40:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:35,963 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 04:40:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:35,964 INFO L225 Difference]: With dead ends: 525 [2021-06-05 04:40:35,964 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 04:40:35,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:40:35,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 04:40:35,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 344. [2021-06-05 04:40:35,985 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 04:40:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1071 transitions. [2021-06-05 04:40:35,985 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1071 transitions. Word has length 20 [2021-06-05 04:40:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:35,986 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1071 transitions. [2021-06-05 04:40:35,986 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 04:40:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1071 transitions. [2021-06-05 04:40:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:35,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:35,986 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:36,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1022,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:36,201 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:36,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1831077051, now seen corresponding path program 97 times [2021-06-05 04:40:36,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:36,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461152017] [2021-06-05 04:40:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:36,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:36,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461152017] [2021-06-05 04:40:36,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461152017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:36,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033639620] [2021-06-05 04:40:36,255 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 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 04:40:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:36,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:36,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:36,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:36,357 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 13 treesize of output 9 [2021-06-05 04:40:36,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:36,381 INFO L628 ElimStorePlain]: treesize reduction 20, result has 57.4 percent of original size [2021-06-05 04:40:36,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:36,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:36,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:36,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:36,391 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 04:40:36,459 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 04:40:36,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033639620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:36,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:36,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:36,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085452944] [2021-06-05 04:40:36,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:36,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:36,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:36,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:36,460 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 04:40:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:36,619 INFO L93 Difference]: Finished difference Result 496 states and 1497 transitions. [2021-06-05 04:40:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:36,619 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 04:40:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:36,620 INFO L225 Difference]: With dead ends: 496 [2021-06-05 04:40:36,620 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 04:40:36,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 178.1ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:36,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 04:40:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 331. [2021-06-05 04:40:36,624 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 04:40:36,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1031 transitions. [2021-06-05 04:40:36,624 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1031 transitions. Word has length 20 [2021-06-05 04:40:36,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:36,624 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1031 transitions. [2021-06-05 04:40:36,624 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 04:40:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1031 transitions. [2021-06-05 04:40:36,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:36,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:36,625 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:36,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-06-05 04:40:36,834 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:36,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:36,834 INFO L82 PathProgramCache]: Analyzing trace with hash 731475677, now seen corresponding path program 98 times [2021-06-05 04:40:36,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:36,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11891445] [2021-06-05 04:40:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:36,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:36,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11891445] [2021-06-05 04:40:36,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11891445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:36,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063844742] [2021-06-05 04:40:36,910 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 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 04:40:36,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:36,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:36,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:36,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:37,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063844742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:37,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:37,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:37,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806290079] [2021-06-05 04:40:37,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:37,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:37,088 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 04:40:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:37,303 INFO L93 Difference]: Finished difference Result 417 states and 1251 transitions. [2021-06-05 04:40:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:37,304 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 04:40:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:37,304 INFO L225 Difference]: With dead ends: 417 [2021-06-05 04:40:37,304 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 04:40:37,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 04:40:37,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 338. [2021-06-05 04:40:37,308 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 04:40:37,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1058 transitions. [2021-06-05 04:40:37,308 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1058 transitions. Word has length 20 [2021-06-05 04:40:37,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:37,309 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1058 transitions. [2021-06-05 04:40:37,309 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 04:40:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1058 transitions. [2021-06-05 04:40:37,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:37,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:37,309 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 04:40:37,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-06-05 04:40:37,529 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:37,529 INFO L82 PathProgramCache]: Analyzing trace with hash -762432045, now seen corresponding path program 99 times [2021-06-05 04:40:37,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:37,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949240290] [2021-06-05 04:40:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:37,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:37,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949240290] [2021-06-05 04:40:37,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949240290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:37,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619100318] [2021-06-05 04:40:37,580 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 04:40:37,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:40:37,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:37,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:37,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:37,781 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 04:40:37,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619100318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:37,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:37,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:37,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674386016] [2021-06-05 04:40:37,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:37,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:37,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:37,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:37,782 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 04:40:38,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:38,025 INFO L93 Difference]: Finished difference Result 423 states and 1258 transitions. [2021-06-05 04:40:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:40:38,025 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 04:40:38,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:38,026 INFO L225 Difference]: With dead ends: 423 [2021-06-05 04:40:38,026 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 04:40:38,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:40:38,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 04:40:38,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 335. [2021-06-05 04:40:38,029 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 04:40:38,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1047 transitions. [2021-06-05 04:40:38,030 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1047 transitions. Word has length 20 [2021-06-05 04:40:38,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:38,030 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1047 transitions. [2021-06-05 04:40:38,030 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 04:40:38,030 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1047 transitions. [2021-06-05 04:40:38,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:38,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:38,031 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 04:40:38,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1054,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:38,232 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:38,232 INFO L82 PathProgramCache]: Analyzing trace with hash -224576467, now seen corresponding path program 100 times [2021-06-05 04:40:38,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:38,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319656525] [2021-06-05 04:40:38,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:38,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:38,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319656525] [2021-06-05 04:40:38,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319656525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:38,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515097564] [2021-06-05 04:40:38,286 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 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 04:40:38,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:38,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:38,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:38,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:38,478 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 04:40:38,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515097564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:38,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:38,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:38,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098171220] [2021-06-05 04:40:38,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:38,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:38,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:38,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:38,482 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 04:40:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:38,723 INFO L93 Difference]: Finished difference Result 387 states and 1176 transitions. [2021-06-05 04:40:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:38,723 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 04:40:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:38,724 INFO L225 Difference]: With dead ends: 387 [2021-06-05 04:40:38,724 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 04:40:38,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 04:40:38,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 332. [2021-06-05 04:40:38,727 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 04:40:38,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1036 transitions. [2021-06-05 04:40:38,728 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1036 transitions. Word has length 20 [2021-06-05 04:40:38,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:38,728 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1036 transitions. [2021-06-05 04:40:38,728 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 04:40:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1036 transitions. [2021-06-05 04:40:38,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:38,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:38,728 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:38,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1069,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:38,929 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:38,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:38,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1744914521, now seen corresponding path program 101 times [2021-06-05 04:40:38,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:38,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143125203] [2021-06-05 04:40:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:38,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:38,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143125203] [2021-06-05 04:40:38,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143125203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:38,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989856094] [2021-06-05 04:40:38,989 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 04:40:39,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:39,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:39,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:39,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:39,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989856094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:39,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:39,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:39,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575187379] [2021-06-05 04:40:39,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:39,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:39,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:39,155 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 04:40:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:39,402 INFO L93 Difference]: Finished difference Result 501 states and 1461 transitions. [2021-06-05 04:40:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:39,402 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 04:40:39,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:39,403 INFO L225 Difference]: With dead ends: 501 [2021-06-05 04:40:39,403 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 04:40:39,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:40:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 04:40:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 340. [2021-06-05 04:40:39,407 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 04:40:39,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1072 transitions. [2021-06-05 04:40:39,408 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1072 transitions. Word has length 20 [2021-06-05 04:40:39,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:39,408 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1072 transitions. [2021-06-05 04:40:39,408 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 04:40:39,408 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1072 transitions. [2021-06-05 04:40:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:39,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:39,408 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:39,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1076,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:39,624 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:39,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1056145053, now seen corresponding path program 102 times [2021-06-05 04:40:39,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:39,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944618052] [2021-06-05 04:40:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:39,685 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 04:40:39,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:39,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944618052] [2021-06-05 04:40:39,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944618052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:39,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552565043] [2021-06-05 04:40:39,685 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 04:40:39,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:40:39,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:39,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:39,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:39,870 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 04:40:39,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552565043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:39,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:39,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:39,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397150852] [2021-06-05 04:40:39,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:39,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:39,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:39,871 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 04:40:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:40,194 INFO L93 Difference]: Finished difference Result 507 states and 1462 transitions. [2021-06-05 04:40:40,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:40:40,194 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 04:40:40,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:40,195 INFO L225 Difference]: With dead ends: 507 [2021-06-05 04:40:40,195 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 04:40:40,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:40:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 04:40:40,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 343. [2021-06-05 04:40:40,201 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 04:40:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1074 transitions. [2021-06-05 04:40:40,201 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1074 transitions. Word has length 20 [2021-06-05 04:40:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:40,201 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1074 transitions. [2021-06-05 04:40:40,201 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 04:40:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1074 transitions. [2021-06-05 04:40:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:40,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:40,202 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 04:40:40,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1086,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:40,402 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:40,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:40,403 INFO L82 PathProgramCache]: Analyzing trace with hash -993514083, now seen corresponding path program 103 times [2021-06-05 04:40:40,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:40,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641438607] [2021-06-05 04:40:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:40,460 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 04:40:40,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:40,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641438607] [2021-06-05 04:40:40,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641438607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:40,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281101225] [2021-06-05 04:40:40,460 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 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 04:40:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:40,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:40,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:40,643 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 04:40:40,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281101225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:40,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:40,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:40,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409103250] [2021-06-05 04:40:40,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:40,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:40,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:40,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:40,643 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 04:40:40,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:40,871 INFO L93 Difference]: Finished difference Result 498 states and 1448 transitions. [2021-06-05 04:40:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:40,872 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 04:40:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:40,872 INFO L225 Difference]: With dead ends: 498 [2021-06-05 04:40:40,872 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 04:40:40,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:40:40,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 04:40:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 336. [2021-06-05 04:40:40,876 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 04:40:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1056 transitions. [2021-06-05 04:40:40,877 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1056 transitions. Word has length 20 [2021-06-05 04:40:40,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:40,877 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1056 transitions. [2021-06-05 04:40:40,877 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 04:40:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1056 transitions. [2021-06-05 04:40:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:40,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:40,877 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 04:40:41,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-06-05 04:40:41,078 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:41,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash 298828317, now seen corresponding path program 104 times [2021-06-05 04:40:41,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:41,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893548417] [2021-06-05 04:40:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:41,137 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 04:40:41,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:41,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893548417] [2021-06-05 04:40:41,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893548417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:41,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738140654] [2021-06-05 04:40:41,137 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 04:40:41,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:41,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:41,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:41,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738140654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:41,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:41,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:41,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956722292] [2021-06-05 04:40:41,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:41,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:41,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:41,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:41,314 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 04:40:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:41,506 INFO L93 Difference]: Finished difference Result 432 states and 1300 transitions. [2021-06-05 04:40:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:41,506 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 04:40:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:41,507 INFO L225 Difference]: With dead ends: 432 [2021-06-05 04:40:41,507 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 04:40:41,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:41,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 04:40:41,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 333. [2021-06-05 04:40:41,510 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 04:40:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1041 transitions. [2021-06-05 04:40:41,511 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1041 transitions. Word has length 20 [2021-06-05 04:40:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:41,511 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1041 transitions. [2021-06-05 04:40:41,511 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 04:40:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1041 transitions. [2021-06-05 04:40:41,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:41,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:41,511 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:41,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:41,721 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:41,721 INFO L82 PathProgramCache]: Analyzing trace with hash -972777555, now seen corresponding path program 105 times [2021-06-05 04:40:41,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:41,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105899734] [2021-06-05 04:40:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:41,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:41,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105899734] [2021-06-05 04:40:41,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105899734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:41,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367504940] [2021-06-05 04:40:41,809 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 04:40:41,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:40:41,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:41,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:41,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:41,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367504940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:41,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:41,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:41,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594127559] [2021-06-05 04:40:41,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:41,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:41,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:41,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:41,986 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 04:40:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:42,373 INFO L93 Difference]: Finished difference Result 475 states and 1389 transitions. [2021-06-05 04:40:42,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:40:42,373 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 04:40:42,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:42,374 INFO L225 Difference]: With dead ends: 475 [2021-06-05 04:40:42,374 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 04:40:42,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:40:42,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 04:40:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 343. [2021-06-05 04:40:42,377 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 04:40:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1068 transitions. [2021-06-05 04:40:42,378 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1068 transitions. Word has length 20 [2021-06-05 04:40:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:42,378 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1068 transitions. [2021-06-05 04:40:42,378 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 04:40:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1068 transitions. [2021-06-05 04:40:42,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:42,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:42,378 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 04:40:42,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1119,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:42,579 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:42,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:42,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1406765815, now seen corresponding path program 106 times [2021-06-05 04:40:42,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:42,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525016289] [2021-06-05 04:40:42,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:42,636 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 04:40:42,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:42,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525016289] [2021-06-05 04:40:42,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525016289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:42,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237013840] [2021-06-05 04:40:42,636 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 04:40:42,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:42,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:42,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:42,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:42,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237013840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:42,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:42,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:42,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168120127] [2021-06-05 04:40:42,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:42,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:42,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:42,807 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 04:40:43,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:43,079 INFO L93 Difference]: Finished difference Result 446 states and 1335 transitions. [2021-06-05 04:40:43,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:43,080 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 04:40:43,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:43,081 INFO L225 Difference]: With dead ends: 446 [2021-06-05 04:40:43,081 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 04:40:43,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:40:43,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 04:40:43,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 332. [2021-06-05 04:40:43,084 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 04:40:43,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1036 transitions. [2021-06-05 04:40:43,084 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1036 transitions. Word has length 20 [2021-06-05 04:40:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:43,084 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1036 transitions. [2021-06-05 04:40:43,084 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 04:40:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1036 transitions. [2021-06-05 04:40:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:43,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:43,085 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 04:40:43,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1127,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:43,285 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:43,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1303332125, now seen corresponding path program 107 times [2021-06-05 04:40:43,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:43,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668372856] [2021-06-05 04:40:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:43,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:43,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668372856] [2021-06-05 04:40:43,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668372856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:43,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862176160] [2021-06-05 04:40:43,337 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 04:40:43,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:43,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:43,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:43,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:43,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862176160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:43,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:43,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:43,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796975359] [2021-06-05 04:40:43,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:43,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:43,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:43,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:43,544 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 04:40:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:43,804 INFO L93 Difference]: Finished difference Result 378 states and 1152 transitions. [2021-06-05 04:40:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:43,805 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 04:40:43,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:43,805 INFO L225 Difference]: With dead ends: 378 [2021-06-05 04:40:43,805 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 04:40:43,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 04:40:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 334. [2021-06-05 04:40:43,814 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 04:40:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1041 transitions. [2021-06-05 04:40:43,814 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1041 transitions. Word has length 20 [2021-06-05 04:40:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:43,814 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1041 transitions. [2021-06-05 04:40:43,814 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 04:40:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1041 transitions. [2021-06-05 04:40:43,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:43,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:43,815 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:44,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1135 [2021-06-05 04:40:44,029 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:44,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:44,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2054732563, now seen corresponding path program 108 times [2021-06-05 04:40:44,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:44,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526247506] [2021-06-05 04:40:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:44,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:44,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526247506] [2021-06-05 04:40:44,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526247506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:44,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621511407] [2021-06-05 04:40:44,080 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 04:40:44,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:40:44,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:44,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:44,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621511407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:44,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:44,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:44,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959312282] [2021-06-05 04:40:44,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:44,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:44,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:44,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:44,249 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 04:40:44,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:44,533 INFO L93 Difference]: Finished difference Result 403 states and 1204 transitions. [2021-06-05 04:40:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:40:44,533 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 04:40:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:44,534 INFO L225 Difference]: With dead ends: 403 [2021-06-05 04:40:44,534 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 04:40:44,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 278.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:40:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 04:40:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 344. [2021-06-05 04:40:44,537 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 04:40:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1068 transitions. [2021-06-05 04:40:44,538 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1068 transitions. Word has length 20 [2021-06-05 04:40:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:44,538 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1068 transitions. [2021-06-05 04:40:44,538 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 04:40:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1068 transitions. [2021-06-05 04:40:44,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:44,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:44,538 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 04:40:44,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-06-05 04:40:44,739 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:44,739 INFO L82 PathProgramCache]: Analyzing trace with hash 139308637, now seen corresponding path program 109 times [2021-06-05 04:40:44,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:44,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121096396] [2021-06-05 04:40:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:44,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:44,797 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 04:40:44,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:44,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121096396] [2021-06-05 04:40:44,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121096396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:44,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624392732] [2021-06-05 04:40:44,798 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 04:40:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:44,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:44,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624392732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:44,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:44,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:44,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360366406] [2021-06-05 04:40:44,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:44,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:44,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:44,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:44,969 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 04:40:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:45,202 INFO L93 Difference]: Finished difference Result 374 states and 1150 transitions. [2021-06-05 04:40:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:45,203 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 04:40:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:45,203 INFO L225 Difference]: With dead ends: 374 [2021-06-05 04:40:45,203 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 04:40:45,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 04:40:45,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 329. [2021-06-05 04:40:45,206 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 04:40:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1023 transitions. [2021-06-05 04:40:45,207 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1023 transitions. Word has length 20 [2021-06-05 04:40:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:45,207 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1023 transitions. [2021-06-05 04:40:45,207 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 04:40:45,207 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1023 transitions. [2021-06-05 04:40:45,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:45,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:45,207 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 04:40:45,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1150 [2021-06-05 04:40:45,408 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:45,408 INFO L82 PathProgramCache]: Analyzing trace with hash 657164802, now seen corresponding path program 110 times [2021-06-05 04:40:45,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:45,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241852821] [2021-06-05 04:40:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:45,462 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 04:40:45,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:45,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241852821] [2021-06-05 04:40:45,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241852821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:45,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677932919] [2021-06-05 04:40:45,463 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 04:40:45,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:45,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:45,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:45,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:45,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:45,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:45,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:40:45,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:45,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:45,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:45,610 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.6 percent of original size [2021-06-05 04:40:45,612 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 6 treesize of output 4 [2021-06-05 04:40:45,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:45,634 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 04:40:45,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:45,635 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-05 04:40:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:45,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677932919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:45,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:45,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 04:40:45,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216511590] [2021-06-05 04:40:45,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:45,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:45,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:45,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:45,700 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 04:40:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:45,987 INFO L93 Difference]: Finished difference Result 421 states and 1257 transitions. [2021-06-05 04:40:45,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:45,987 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 04:40:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:45,987 INFO L225 Difference]: With dead ends: 421 [2021-06-05 04:40:45,987 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 04:40:45,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:40:45,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 04:40:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 313. [2021-06-05 04:40:45,990 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 04:40:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 963 transitions. [2021-06-05 04:40:45,991 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 963 transitions. Word has length 20 [2021-06-05 04:40:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:45,991 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 963 transitions. [2021-06-05 04:40:45,991 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 04:40:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 963 transitions. [2021-06-05 04:40:45,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:45,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:45,991 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:46,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:46,192 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:46,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1666539965, now seen corresponding path program 111 times [2021-06-05 04:40:46,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:46,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84781153] [2021-06-05 04:40:46,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:46,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:46,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:46,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84781153] [2021-06-05 04:40:46,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84781153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:46,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246073656] [2021-06-05 04:40:46,255 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 04:40:46,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:40:46,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:46,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:46,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:46,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:46,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:46,353 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 13 treesize of output 9 [2021-06-05 04:40:46,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:46,385 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-06-05 04:40:46,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:46,388 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:46,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:46,403 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 6 treesize of output 4 [2021-06-05 04:40:46,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:46,421 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-06-05 04:40:46,421 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:40:46,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:46,422 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 04:40:46,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:46,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246073656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:46,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:46,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:46,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192953769] [2021-06-05 04:40:46,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:46,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:46,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:46,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:46,464 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 04:40:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:46,618 INFO L93 Difference]: Finished difference Result 488 states and 1442 transitions. [2021-06-05 04:40:46,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:46,618 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 04:40:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:46,619 INFO L225 Difference]: With dead ends: 488 [2021-06-05 04:40:46,619 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 04:40:46,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 04:40:46,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 329. [2021-06-05 04:40:46,622 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 04:40:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1020 transitions. [2021-06-05 04:40:46,623 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1020 transitions. Word has length 20 [2021-06-05 04:40:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:46,623 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1020 transitions. [2021-06-05 04:40:46,623 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 04:40:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1020 transitions. [2021-06-05 04:40:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:46,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:46,623 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 04:40:46,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:46,824 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:46,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:46,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1469783801, now seen corresponding path program 112 times [2021-06-05 04:40:46,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:46,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814766726] [2021-06-05 04:40:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:46,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:46,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814766726] [2021-06-05 04:40:46,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814766726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:46,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383604675] [2021-06-05 04:40:46,876 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 04:40:46,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:46,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:46,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:46,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:46,956 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 04:40:46,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:46,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:46,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:46,982 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 04:40:46,983 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 04:40:46,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:46,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:46,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:46,992 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:40:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:47,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383604675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:47,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:47,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:40:47,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254338262] [2021-06-05 04:40:47,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:40:47,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:47,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:40:47,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:40:47,032 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 04:40:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:47,182 INFO L93 Difference]: Finished difference Result 540 states and 1563 transitions. [2021-06-05 04:40:47,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:47,183 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 04:40:47,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:47,183 INFO L225 Difference]: With dead ends: 540 [2021-06-05 04:40:47,183 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 04:40:47,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 04:40:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 335. [2021-06-05 04:40:47,187 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 04:40:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-06-05 04:40:47,188 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-06-05 04:40:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:47,188 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-06-05 04:40:47,188 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 04:40:47,188 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-06-05 04:40:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:47,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:47,188 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 04:40:47,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1183,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:47,404 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:47,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:47,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1331275773, now seen corresponding path program 113 times [2021-06-05 04:40:47,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:47,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502127999] [2021-06-05 04:40:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:47,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:47,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502127999] [2021-06-05 04:40:47,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502127999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:47,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790322838] [2021-06-05 04:40:47,478 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 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 04:40:47,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:40:47,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:47,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:47,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:47,578 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 5 treesize of output 3 [2021-06-05 04:40:47,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:47,617 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-06-05 04:40:47,619 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 6 treesize of output 4 [2021-06-05 04:40:47,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:47,648 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 04:40:47,649 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-06-05 04:40:47,651 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 04:40:47,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:47,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:47,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:47,671 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:40:47,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:47,671 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 04:40:47,711 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 04:40:47,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790322838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:47,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:47,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:47,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082463243] [2021-06-05 04:40:47,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:47,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:47,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:47,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:47,711 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 04:40:47,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:47,852 INFO L93 Difference]: Finished difference Result 497 states and 1454 transitions. [2021-06-05 04:40:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:47,852 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 04:40:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:47,853 INFO L225 Difference]: With dead ends: 497 [2021-06-05 04:40:47,853 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 04:40:47,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 04:40:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 333. [2021-06-05 04:40:47,857 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 04:40:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1034 transitions. [2021-06-05 04:40:47,858 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1034 transitions. Word has length 20 [2021-06-05 04:40:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:47,858 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1034 transitions. [2021-06-05 04:40:47,858 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 04:40:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1034 transitions. [2021-06-05 04:40:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:47,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:47,858 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 04:40:48,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:48,059 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash -809850233, now seen corresponding path program 114 times [2021-06-05 04:40:48,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:48,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260002557] [2021-06-05 04:40:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:48,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:48,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260002557] [2021-06-05 04:40:48,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260002557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:48,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368017588] [2021-06-05 04:40:48,111 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 04:40:48,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:40:48,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:48,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:48,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:48,225 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 5 treesize of output 3 [2021-06-05 04:40:48,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:48,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:48,246 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 12 treesize of output 8 [2021-06-05 04:40:48,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:48,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:48,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:48,273 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 04:40:48,273 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-06-05 04:40:48,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:48,274 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 04:40:48,322 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 04:40:48,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368017588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:48,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:48,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:40:48,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172503568] [2021-06-05 04:40:48,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:40:48,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:48,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:40:48,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:48,323 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 04:40:48,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:48,478 INFO L93 Difference]: Finished difference Result 600 states and 1752 transitions. [2021-06-05 04:40:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:48,478 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 04:40:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:48,479 INFO L225 Difference]: With dead ends: 600 [2021-06-05 04:40:48,479 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 04:40:48,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 04:40:48,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 339. [2021-06-05 04:40:48,483 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 04:40:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1058 transitions. [2021-06-05 04:40:48,483 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1058 transitions. Word has length 20 [2021-06-05 04:40:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:48,484 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1058 transitions. [2021-06-05 04:40:48,484 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 04:40:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1058 transitions. [2021-06-05 04:40:48,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:48,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:48,484 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:48,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1205,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:48,685 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:48,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:48,685 INFO L82 PathProgramCache]: Analyzing trace with hash 823201159, now seen corresponding path program 115 times [2021-06-05 04:40:48,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:48,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719191877] [2021-06-05 04:40:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:48,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:48,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719191877] [2021-06-05 04:40:48,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719191877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:48,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267699942] [2021-06-05 04:40:48,734 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 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 04:40:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:48,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:48,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:48,814 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 6 treesize of output 4 [2021-06-05 04:40:48,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:48,844 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:40:48,845 INFO L518 ElimStorePlain]: Eliminatee v_prenex_51 vanished before elimination [2021-06-05 04:40:48,847 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 12 treesize of output 8 [2021-06-05 04:40:48,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:48,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:48,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:48,866 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:40:48,867 INFO L518 ElimStorePlain]: Eliminatee v_prenex_49 vanished before elimination [2021-06-05 04:40:48,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:48,867 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 04:40:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:48,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267699942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:48,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:48,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:48,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545826035] [2021-06-05 04:40:48,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:48,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:48,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:48,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:48,935 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 04:40:49,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:49,083 INFO L93 Difference]: Finished difference Result 567 states and 1670 transitions. [2021-06-05 04:40:49,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:49,083 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 04:40:49,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:49,084 INFO L225 Difference]: With dead ends: 567 [2021-06-05 04:40:49,084 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 04:40:49,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:49,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 04:40:49,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 342. [2021-06-05 04:40:49,088 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 04:40:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1073 transitions. [2021-06-05 04:40:49,088 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1073 transitions. Word has length 20 [2021-06-05 04:40:49,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:49,089 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1073 transitions. [2021-06-05 04:40:49,089 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 04:40:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1073 transitions. [2021-06-05 04:40:49,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:49,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:49,089 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:49,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1215,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:49,289 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:49,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1133935797, now seen corresponding path program 116 times [2021-06-05 04:40:49,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:49,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229862904] [2021-06-05 04:40:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:49,342 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 04:40:49,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:49,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229862904] [2021-06-05 04:40:49,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229862904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:49,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901149456] [2021-06-05 04:40:49,342 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 04:40:49,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:49,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:49,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:49,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:49,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:49,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:49,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:49,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:49,459 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 04:40:49,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:49,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:49,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:49,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:49,484 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:40:49,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:49,484 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:71, output treesize:20 [2021-06-05 04:40:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:49,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901149456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:49,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:49,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:49,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226514543] [2021-06-05 04:40:49,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:49,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:49,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:49,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:49,546 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 04:40:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:49,688 INFO L93 Difference]: Finished difference Result 534 states and 1593 transitions. [2021-06-05 04:40:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:49,689 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 04:40:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:49,689 INFO L225 Difference]: With dead ends: 534 [2021-06-05 04:40:49,689 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 04:40:49,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 04:40:49,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 333. [2021-06-05 04:40:49,693 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 04:40:49,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1034 transitions. [2021-06-05 04:40:49,693 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1034 transitions. Word has length 20 [2021-06-05 04:40:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:49,693 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1034 transitions. [2021-06-05 04:40:49,694 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 04:40:49,694 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1034 transitions. [2021-06-05 04:40:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:49,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:49,694 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 04:40:49,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-06-05 04:40:49,894 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:49,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:49,895 INFO L82 PathProgramCache]: Analyzing trace with hash 155014293, now seen corresponding path program 117 times [2021-06-05 04:40:49,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:49,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432335328] [2021-06-05 04:40:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:49,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:49,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432335328] [2021-06-05 04:40:49,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432335328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:49,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501085337] [2021-06-05 04:40:49,953 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 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 04:40:50,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:40:50,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:50,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:50,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:50,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:50,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:50,033 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 13 treesize of output 9 [2021-06-05 04:40:50,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:50,055 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 04:40:50,057 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 12 treesize of output 8 [2021-06-05 04:40:50,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:50,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:50,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:50,066 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:40:50,142 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 04:40:50,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501085337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:50,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:50,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:50,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554778031] [2021-06-05 04:40:50,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:50,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:50,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:50,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:50,142 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 04:40:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:50,313 INFO L93 Difference]: Finished difference Result 613 states and 1774 transitions. [2021-06-05 04:40:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:50,313 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 04:40:50,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:50,314 INFO L225 Difference]: With dead ends: 613 [2021-06-05 04:40:50,314 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 04:40:50,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:50,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 04:40:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 341. [2021-06-05 04:40:50,318 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 04:40:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1070 transitions. [2021-06-05 04:40:50,319 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1070 transitions. Word has length 20 [2021-06-05 04:40:50,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:50,319 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1070 transitions. [2021-06-05 04:40:50,319 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 04:40:50,319 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1070 transitions. [2021-06-05 04:40:50,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:50,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:50,319 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:50,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1238,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:50,520 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:50,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:50,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1338893429, now seen corresponding path program 118 times [2021-06-05 04:40:50,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:50,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348622491] [2021-06-05 04:40:50,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:50,573 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 04:40:50,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:50,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348622491] [2021-06-05 04:40:50,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348622491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:50,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464912549] [2021-06-05 04:40:50,573 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 04:40:50,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:50,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:50,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:50,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:50,679 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 5 treesize of output 3 [2021-06-05 04:40:50,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:50,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:40:50,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:50,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:50,730 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 04:40:50,732 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 12 treesize of output 8 [2021-06-05 04:40:50,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:50,735 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 04:40:50,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:50,752 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:40:50,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:50,752 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 04:40:50,820 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 04:40:50,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464912549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:50,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:50,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:50,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329304399] [2021-06-05 04:40:50,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:50,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:50,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:50,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:50,821 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 04:40:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:51,011 INFO L93 Difference]: Finished difference Result 599 states and 1723 transitions. [2021-06-05 04:40:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:51,011 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 04:40:51,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:51,012 INFO L225 Difference]: With dead ends: 599 [2021-06-05 04:40:51,012 INFO L226 Difference]: Without dead ends: 593 [2021-06-05 04:40:51,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-05 04:40:51,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 335. [2021-06-05 04:40:51,016 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 04:40:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-06-05 04:40:51,016 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-06-05 04:40:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:51,017 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-06-05 04:40:51,017 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 04:40:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-06-05 04:40:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:51,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:51,017 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 04:40:51,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1249,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:51,218 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:51,218 INFO L82 PathProgramCache]: Analyzing trace with hash 906414731, now seen corresponding path program 119 times [2021-06-05 04:40:51,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:51,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919598693] [2021-06-05 04:40:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:51,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:51,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919598693] [2021-06-05 04:40:51,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919598693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:51,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374067446] [2021-06-05 04:40:51,278 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 04:40:51,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:40:51,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:51,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:51,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:51,369 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 13 treesize of output 9 [2021-06-05 04:40:51,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:51,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:51,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:51,423 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-06-05 04:40:51,425 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 6 treesize of output 4 [2021-06-05 04:40:51,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:51,442 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 04:40:51,442 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-06-05 04:40:51,442 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:40:51,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:51,443 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 04:40:51,525 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 04:40:51,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374067446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:51,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:51,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:51,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851303926] [2021-06-05 04:40:51,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:51,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:51,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:51,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:51,526 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 04:40:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:51,700 INFO L93 Difference]: Finished difference Result 624 states and 1812 transitions. [2021-06-05 04:40:51,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:51,700 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 04:40:51,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:51,701 INFO L225 Difference]: With dead ends: 624 [2021-06-05 04:40:51,701 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 04:40:51,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:51,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 04:40:51,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 338. [2021-06-05 04:40:51,711 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 04:40:51,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1060 transitions. [2021-06-05 04:40:51,712 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1060 transitions. Word has length 20 [2021-06-05 04:40:51,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:51,712 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1060 transitions. [2021-06-05 04:40:51,712 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 04:40:51,712 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1060 transitions. [2021-06-05 04:40:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:51,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:51,713 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:51,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1261,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:51,913 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:51,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:51,913 INFO L82 PathProgramCache]: Analyzing trace with hash -2096210165, now seen corresponding path program 120 times [2021-06-05 04:40:51,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:51,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432117157] [2021-06-05 04:40:51,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:51,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:51,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432117157] [2021-06-05 04:40:51,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432117157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:51,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245167054] [2021-06-05 04:40:51,969 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 04:40:52,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:40:52,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:52,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:52,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:52,057 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 04:40:52,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:52,095 INFO L628 ElimStorePlain]: treesize reduction 12, result has 81.3 percent of original size [2021-06-05 04:40:52,097 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 6 treesize of output 4 [2021-06-05 04:40:52,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:52,126 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 04:40:52,128 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 12 treesize of output 8 [2021-06-05 04:40:52,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:52,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:52,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:52,147 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:40:52,147 INFO L518 ElimStorePlain]: Eliminatee v_prenex_59 vanished before elimination [2021-06-05 04:40:52,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:52,148 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 04:40:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:52,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245167054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:52,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:52,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:52,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110514731] [2021-06-05 04:40:52,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:52,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:52,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:52,217 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 04:40:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:52,396 INFO L93 Difference]: Finished difference Result 593 states and 1745 transitions. [2021-06-05 04:40:52,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:52,396 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 04:40:52,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:52,397 INFO L225 Difference]: With dead ends: 593 [2021-06-05 04:40:52,397 INFO L226 Difference]: Without dead ends: 593 [2021-06-05 04:40:52,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-05 04:40:52,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 335. [2021-06-05 04:40:52,400 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 04:40:52,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1045 transitions. [2021-06-05 04:40:52,401 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1045 transitions. Word has length 20 [2021-06-05 04:40:52,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:52,402 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1045 transitions. [2021-06-05 04:40:52,402 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 04:40:52,402 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1045 transitions. [2021-06-05 04:40:52,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:52,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:52,402 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:52,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1273,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:52,603 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:52,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:52,603 INFO L82 PathProgramCache]: Analyzing trace with hash 927151259, now seen corresponding path program 121 times [2021-06-05 04:40:52,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:52,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449060275] [2021-06-05 04:40:52,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:52,652 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 04:40:52,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:52,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449060275] [2021-06-05 04:40:52,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449060275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:52,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988367876] [2021-06-05 04:40:52,653 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 04:40:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:52,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:52,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:52,742 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 04:40:52,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:52,772 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-06-05 04:40:52,772 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-06-05 04:40:52,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:52,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:52,777 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 04:40:52,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:52,795 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:40:52,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:52,795 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 04:40:52,864 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 04:40:52,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988367876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:52,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:52,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:52,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016898540] [2021-06-05 04:40:52,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:52,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:52,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:52,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:52,865 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 04:40:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:53,034 INFO L93 Difference]: Finished difference Result 547 states and 1592 transitions. [2021-06-05 04:40:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:53,034 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 04:40:53,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:53,035 INFO L225 Difference]: With dead ends: 547 [2021-06-05 04:40:53,035 INFO L226 Difference]: Without dead ends: 541 [2021-06-05 04:40:53,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-05 04:40:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 339. [2021-06-05 04:40:53,039 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 04:40:53,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1059 transitions. [2021-06-05 04:40:53,039 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1059 transitions. Word has length 20 [2021-06-05 04:40:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:53,039 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1059 transitions. [2021-06-05 04:40:53,039 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 04:40:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1059 transitions. [2021-06-05 04:40:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:53,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:53,040 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:53,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:53,240 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash -988272667, now seen corresponding path program 122 times [2021-06-05 04:40:53,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:53,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979921842] [2021-06-05 04:40:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:53,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:53,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979921842] [2021-06-05 04:40:53,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979921842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:53,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289571491] [2021-06-05 04:40:53,290 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 04:40:53,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:53,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:53,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:53,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:53,369 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 5 treesize of output 3 [2021-06-05 04:40:53,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:53,372 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 12 treesize of output 8 [2021-06-05 04:40:53,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:53,407 INFO L628 ElimStorePlain]: treesize reduction 14, result has 76.3 percent of original size [2021-06-05 04:40:53,408 INFO L518 ElimStorePlain]: Eliminatee v_prenex_64 vanished before elimination [2021-06-05 04:40:53,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:53,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:53,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:53,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:53,431 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:40:53,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:40:53,432 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-06-05 04:40:53,496 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 04:40:53,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289571491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:53,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:53,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:53,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372791159] [2021-06-05 04:40:53,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:53,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:53,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:53,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:53,497 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 04:40:53,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:53,652 INFO L93 Difference]: Finished difference Result 530 states and 1574 transitions. [2021-06-05 04:40:53,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:53,652 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 04:40:53,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:53,652 INFO L225 Difference]: With dead ends: 530 [2021-06-05 04:40:53,653 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 04:40:53,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 04:40:53,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 334. [2021-06-05 04:40:53,656 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 04:40:53,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1041 transitions. [2021-06-05 04:40:53,656 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1041 transitions. Word has length 20 [2021-06-05 04:40:53,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:53,657 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1041 transitions. [2021-06-05 04:40:53,657 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 04:40:53,657 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1041 transitions. [2021-06-05 04:40:53,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:53,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:53,657 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:53,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:53,857 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:53,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:53,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1870628323, now seen corresponding path program 123 times [2021-06-05 04:40:53,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:53,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938019683] [2021-06-05 04:40:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:53,905 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 04:40:53,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:53,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938019683] [2021-06-05 04:40:53,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938019683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:53,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187547147] [2021-06-05 04:40:53,906 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 04:40:53,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:40:53,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:53,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:53,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:54,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:54,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:54,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:54,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:54,021 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:40:54,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:54,021 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:40:54,046 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 04:40:54,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187547147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:54,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:54,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:54,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720074132] [2021-06-05 04:40:54,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:54,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:54,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:54,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:54,047 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 04:40:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:54,172 INFO L93 Difference]: Finished difference Result 483 states and 1452 transitions. [2021-06-05 04:40:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:54,172 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 04:40:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:54,173 INFO L225 Difference]: With dead ends: 483 [2021-06-05 04:40:54,173 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 04:40:54,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:54,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 04:40:54,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 337. [2021-06-05 04:40:54,176 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 04:40:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1047 transitions. [2021-06-05 04:40:54,177 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1047 transitions. Word has length 20 [2021-06-05 04:40:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:54,177 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1047 transitions. [2021-06-05 04:40:54,177 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 04:40:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1047 transitions. [2021-06-05 04:40:54,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:54,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:54,177 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 04:40:54,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1309 [2021-06-05 04:40:54,378 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:54,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:54,378 INFO L82 PathProgramCache]: Analyzing trace with hash -237576931, now seen corresponding path program 124 times [2021-06-05 04:40:54,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:54,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682326897] [2021-06-05 04:40:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:54,430 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 04:40:54,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:54,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682326897] [2021-06-05 04:40:54,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682326897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:54,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278722966] [2021-06-05 04:40:54,430 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 04:40:54,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:54,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:54,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:54,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:54,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:54,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:54,505 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 13 treesize of output 9 [2021-06-05 04:40:54,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:54,517 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:40:54,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:54,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:40:54,564 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 04:40:54,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278722966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:54,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:54,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:40:54,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704159671] [2021-06-05 04:40:54,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:40:54,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:54,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:40:54,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:40:54,565 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 04:40:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:54,703 INFO L93 Difference]: Finished difference Result 487 states and 1444 transitions. [2021-06-05 04:40:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:54,704 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 04:40:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:54,704 INFO L225 Difference]: With dead ends: 487 [2021-06-05 04:40:54,704 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 04:40:54,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 04:40:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 336. [2021-06-05 04:40:54,708 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 04:40:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1042 transitions. [2021-06-05 04:40:54,708 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1042 transitions. Word has length 20 [2021-06-05 04:40:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:54,708 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1042 transitions. [2021-06-05 04:40:54,708 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 04:40:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1042 transitions. [2021-06-05 04:40:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:54,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:54,709 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 04:40:54,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1315,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:54,913 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:54,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2100253409, now seen corresponding path program 125 times [2021-06-05 04:40:54,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:54,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989459183] [2021-06-05 04:40:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:54,961 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 04:40:54,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:54,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989459183] [2021-06-05 04:40:54,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989459183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:54,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643780829] [2021-06-05 04:40:54,962 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 04:40:55,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:55,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:55,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:40:55,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:55,042 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 04:40:55,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:40:55,055 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:40:55,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:40:55,055 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:40:55,099 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 04:40:55,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643780829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:55,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:55,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:40:55,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607487910] [2021-06-05 04:40:55,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:40:55,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:55,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:40:55,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:40:55,100 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 04:40:55,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:55,236 INFO L93 Difference]: Finished difference Result 444 states and 1347 transitions. [2021-06-05 04:40:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:55,237 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 04:40:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:55,237 INFO L225 Difference]: With dead ends: 444 [2021-06-05 04:40:55,237 INFO L226 Difference]: Without dead ends: 444 [2021-06-05 04:40:55,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:55,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-06-05 04:40:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 319. [2021-06-05 04:40:55,240 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 04:40:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 981 transitions. [2021-06-05 04:40:55,241 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 981 transitions. Word has length 20 [2021-06-05 04:40:55,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:55,241 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 981 transitions. [2021-06-05 04:40:55,241 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 04:40:55,241 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 981 transitions. [2021-06-05 04:40:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:55,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:55,242 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 04:40:55,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-06-05 04:40:55,450 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:55,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:55,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1574380345, now seen corresponding path program 126 times [2021-06-05 04:40:55,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:55,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798751090] [2021-06-05 04:40:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:55,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:55,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798751090] [2021-06-05 04:40:55,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798751090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:55,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646715845] [2021-06-05 04:40:55,522 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 04:40:55,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:40:55,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:55,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:55,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:55,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646715845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:55,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:55,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:40:55,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351897399] [2021-06-05 04:40:55,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:40:55,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:55,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:40:55,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:40:55,643 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 04:40:55,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:55,754 INFO L93 Difference]: Finished difference Result 397 states and 1189 transitions. [2021-06-05 04:40:55,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:55,755 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 04:40:55,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:55,755 INFO L225 Difference]: With dead ends: 397 [2021-06-05 04:40:55,755 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 04:40:55,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:55,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 04:40:55,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 325. [2021-06-05 04:40:55,758 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 04:40:55,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 1008 transitions. [2021-06-05 04:40:55,759 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 1008 transitions. Word has length 20 [2021-06-05 04:40:55,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:55,759 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 1008 transitions. [2021-06-05 04:40:55,759 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 04:40:55,759 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 1008 transitions. [2021-06-05 04:40:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:55,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:55,759 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:55,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1330 [2021-06-05 04:40:55,960 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:55,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:55,960 INFO L82 PathProgramCache]: Analyzing trace with hash 763449995, now seen corresponding path program 127 times [2021-06-05 04:40:55,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:55,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277881644] [2021-06-05 04:40:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:56,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:56,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277881644] [2021-06-05 04:40:56,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277881644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:56,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234066092] [2021-06-05 04:40:56,011 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 04:40:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:56,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:56,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:56,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234066092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:56,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:56,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:40:56,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991656127] [2021-06-05 04:40:56,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:40:56,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:56,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:40:56,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:40:56,118 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 04:40:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:56,221 INFO L93 Difference]: Finished difference Result 403 states and 1204 transitions. [2021-06-05 04:40:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:56,221 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 04:40:56,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:56,222 INFO L225 Difference]: With dead ends: 403 [2021-06-05 04:40:56,222 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 04:40:56,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:56,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 04:40:56,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 322. [2021-06-05 04:40:56,225 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 04:40:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 993 transitions. [2021-06-05 04:40:56,225 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 993 transitions. Word has length 20 [2021-06-05 04:40:56,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:56,225 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 993 transitions. [2021-06-05 04:40:56,225 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 04:40:56,225 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 993 transitions. [2021-06-05 04:40:56,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:56,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:56,226 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:56,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-06-05 04:40:56,426 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:56,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:56,427 INFO L82 PathProgramCache]: Analyzing trace with hash 766075771, now seen corresponding path program 128 times [2021-06-05 04:40:56,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:56,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206076040] [2021-06-05 04:40:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:56,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:56,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206076040] [2021-06-05 04:40:56,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206076040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:56,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599286060] [2021-06-05 04:40:56,477 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 04:40:56,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:56,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:56,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:56,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:56,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599286060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:56,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:56,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:40:56,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82941686] [2021-06-05 04:40:56,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:40:56,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:56,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:40:56,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:40:56,593 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 04:40:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:56,704 INFO L93 Difference]: Finished difference Result 361 states and 1097 transitions. [2021-06-05 04:40:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:56,704 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 04:40:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:56,704 INFO L225 Difference]: With dead ends: 361 [2021-06-05 04:40:56,704 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 04:40:56,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 04:40:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 328. [2021-06-05 04:40:56,707 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 04:40:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 1008 transitions. [2021-06-05 04:40:56,708 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 1008 transitions. Word has length 20 [2021-06-05 04:40:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:56,708 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 1008 transitions. [2021-06-05 04:40:56,708 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 04:40:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 1008 transitions. [2021-06-05 04:40:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:56,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:56,708 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:56,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1342,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:56,909 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:56,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1330075033, now seen corresponding path program 129 times [2021-06-05 04:40:56,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:56,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112778672] [2021-06-05 04:40:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:56,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:56,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112778672] [2021-06-05 04:40:56,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112778672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:56,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910045259] [2021-06-05 04:40:56,966 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 04:40:57,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:40:57,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:57,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:57,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:57,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910045259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:57,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:57,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:57,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530605944] [2021-06-05 04:40:57,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:57,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:57,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:57,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:57,124 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 04:40:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:57,252 INFO L93 Difference]: Finished difference Result 483 states and 1424 transitions. [2021-06-05 04:40:57,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:57,252 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 04:40:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:57,253 INFO L225 Difference]: With dead ends: 483 [2021-06-05 04:40:57,253 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 04:40:57,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:57,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 04:40:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 338. [2021-06-05 04:40:57,256 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 04:40:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1053 transitions. [2021-06-05 04:40:57,257 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1053 transitions. Word has length 20 [2021-06-05 04:40:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:57,257 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1053 transitions. [2021-06-05 04:40:57,257 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 04:40:57,257 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1053 transitions. [2021-06-05 04:40:57,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:57,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:57,258 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:57,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1346 [2021-06-05 04:40:57,458 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:57,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:57,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1470984541, now seen corresponding path program 130 times [2021-06-05 04:40:57,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:57,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767763499] [2021-06-05 04:40:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:57,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:57,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767763499] [2021-06-05 04:40:57,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767763499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:57,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219320297] [2021-06-05 04:40:57,512 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 04:40:57,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:40:57,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:57,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:57,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:57,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219320297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:57,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:57,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:57,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856869060] [2021-06-05 04:40:57,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:57,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:57,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:57,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:57,656 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 04:40:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:57,824 INFO L93 Difference]: Finished difference Result 469 states and 1373 transitions. [2021-06-05 04:40:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:57,825 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 04:40:57,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:57,825 INFO L225 Difference]: With dead ends: 469 [2021-06-05 04:40:57,825 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 04:40:57,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:40:57,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 04:40:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 341. [2021-06-05 04:40:57,829 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 04:40:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1055 transitions. [2021-06-05 04:40:57,830 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1055 transitions. Word has length 20 [2021-06-05 04:40:57,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:57,830 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1055 transitions. [2021-06-05 04:40:57,830 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 04:40:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1055 transitions. [2021-06-05 04:40:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:57,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:57,830 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 04:40:58,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1353 [2021-06-05 04:40:58,045 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:58,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:58,045 INFO L82 PathProgramCache]: Analyzing trace with hash -578674595, now seen corresponding path program 131 times [2021-06-05 04:40:58,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:58,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857803331] [2021-06-05 04:40:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:58,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:58,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857803331] [2021-06-05 04:40:58,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857803331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:58,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62666770] [2021-06-05 04:40:58,102 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 04:40:58,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:40:58,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:58,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:58,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:58,281 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 04:40:58,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62666770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:58,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:58,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:58,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680907476] [2021-06-05 04:40:58,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:58,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:58,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:58,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:58,282 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 04:40:58,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:58,431 INFO L93 Difference]: Finished difference Result 540 states and 1571 transitions. [2021-06-05 04:40:58,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:58,432 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 04:40:58,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:58,432 INFO L225 Difference]: With dead ends: 540 [2021-06-05 04:40:58,433 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 04:40:58,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:58,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 04:40:58,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 344. [2021-06-05 04:40:58,436 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 04:40:58,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1070 transitions. [2021-06-05 04:40:58,437 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1070 transitions. Word has length 20 [2021-06-05 04:40:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:58,437 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1070 transitions. [2021-06-05 04:40:58,437 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 04:40:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1070 transitions. [2021-06-05 04:40:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:58,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:58,437 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:40:58,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:58,638 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:58,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:58,638 INFO L82 PathProgramCache]: Analyzing trace with hash 713667805, now seen corresponding path program 132 times [2021-06-05 04:40:58,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:58,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886249863] [2021-06-05 04:40:58,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:58,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:58,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886249863] [2021-06-05 04:40:58,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886249863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:58,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561419629] [2021-06-05 04:40:58,695 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 04:40:58,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:40:58,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:58,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:58,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:58,859 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 04:40:58,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561419629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:58,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:58,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:40:58,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878685410] [2021-06-05 04:40:58,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:40:58,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:58,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:40:58,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:40:58,860 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 04:40:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:59,015 INFO L93 Difference]: Finished difference Result 509 states and 1504 transitions. [2021-06-05 04:40:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:59,015 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 04:40:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:59,016 INFO L225 Difference]: With dead ends: 509 [2021-06-05 04:40:59,016 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 04:40:59,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:40:59,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 04:40:59,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 341. [2021-06-05 04:40:59,020 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 04:40:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1055 transitions. [2021-06-05 04:40:59,020 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1055 transitions. Word has length 20 [2021-06-05 04:40:59,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:59,020 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1055 transitions. [2021-06-05 04:40:59,020 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 04:40:59,020 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1055 transitions. [2021-06-05 04:40:59,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:59,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:59,021 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 04:40:59,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1369,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:40:59,221 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash -557938067, now seen corresponding path program 133 times [2021-06-05 04:40:59,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:59,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303913027] [2021-06-05 04:40:59,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:59,274 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 04:40:59,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:59,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303913027] [2021-06-05 04:40:59,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303913027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:59,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476025455] [2021-06-05 04:40:59,274 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 04:40:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:59,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:40:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:40:59,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476025455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:59,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:40:59,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:40:59,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657852844] [2021-06-05 04:40:59,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:40:59,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:40:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:40:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:40:59,435 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 04:40:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:40:59,610 INFO L93 Difference]: Finished difference Result 506 states and 1452 transitions. [2021-06-05 04:40:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:40:59,611 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 04:40:59,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:40:59,611 INFO L225 Difference]: With dead ends: 506 [2021-06-05 04:40:59,611 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 04:40:59,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:40:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 04:40:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 345. [2021-06-05 04:40:59,615 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 04:40:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1069 transitions. [2021-06-05 04:40:59,615 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1069 transitions. Word has length 20 [2021-06-05 04:40:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:40:59,615 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1069 transitions. [2021-06-05 04:40:59,615 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 04:40:59,615 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1069 transitions. [2021-06-05 04:40:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:40:59,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:40:59,616 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 04:40:59,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1377 [2021-06-05 04:40:59,816 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:40:59,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:40:59,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1821605303, now seen corresponding path program 134 times [2021-06-05 04:40:59,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:40:59,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878265828] [2021-06-05 04:40:59,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:40:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:40:59,870 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 04:40:59,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:40:59,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878265828] [2021-06-05 04:40:59,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878265828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:40:59,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283295580] [2021-06-05 04:40:59,871 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 04:40:59,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:40:59,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:40:59,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:40:59,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:00,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283295580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:00,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:00,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:00,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140436468] [2021-06-05 04:41:00,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:00,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:00,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:00,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:00,044 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 04:41:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:00,270 INFO L93 Difference]: Finished difference Result 512 states and 1473 transitions. [2021-06-05 04:41:00,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:41:00,271 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 04:41:00,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:00,271 INFO L225 Difference]: With dead ends: 512 [2021-06-05 04:41:00,271 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 04:41:00,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 04:41:00,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 342. [2021-06-05 04:41:00,275 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 04:41:00,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1059 transitions. [2021-06-05 04:41:00,275 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1059 transitions. Word has length 20 [2021-06-05 04:41:00,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:00,275 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1059 transitions. [2021-06-05 04:41:00,275 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 04:41:00,275 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1059 transitions. [2021-06-05 04:41:00,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:00,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:00,276 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 04:41:00,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1385 [2021-06-05 04:41:00,476 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:00,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1603864071, now seen corresponding path program 135 times [2021-06-05 04:41:00,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:00,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100304277] [2021-06-05 04:41:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:00,534 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 04:41:00,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:00,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100304277] [2021-06-05 04:41:00,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100304277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:00,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628397191] [2021-06-05 04:41:00,535 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 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 04:41:00,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:41:00,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:00,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:00,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:00,684 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 04:41:00,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628397191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:00,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:00,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:00,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888560156] [2021-06-05 04:41:00,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:00,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:00,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:00,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:00,685 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 04:41:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:00,851 INFO L93 Difference]: Finished difference Result 445 states and 1330 transitions. [2021-06-05 04:41:00,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:00,851 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 04:41:00,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:00,851 INFO L225 Difference]: With dead ends: 445 [2021-06-05 04:41:00,851 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 04:41:00,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:41:00,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 04:41:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 343. [2021-06-05 04:41:00,855 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 04:41:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1061 transitions. [2021-06-05 04:41:00,855 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1061 transitions. Word has length 20 [2021-06-05 04:41:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:00,855 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1061 transitions. [2021-06-05 04:41:00,855 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 04:41:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1061 transitions. [2021-06-05 04:41:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:00,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:00,856 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:01,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1393 [2021-06-05 04:41:01,061 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:01,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:01,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1398760825, now seen corresponding path program 136 times [2021-06-05 04:41:01,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:01,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601351846] [2021-06-05 04:41:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:01,119 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 04:41:01,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:01,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601351846] [2021-06-05 04:41:01,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601351846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:01,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283478989] [2021-06-05 04:41:01,120 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 04:41:01,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:01,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:01,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:01,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:01,268 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 04:41:01,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283478989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:01,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:01,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:01,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811764189] [2021-06-05 04:41:01,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:01,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:01,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:01,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:01,269 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 04:41:01,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:01,470 INFO L93 Difference]: Finished difference Result 439 states and 1312 transitions. [2021-06-05 04:41:01,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:01,470 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 04:41:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:01,471 INFO L225 Difference]: With dead ends: 439 [2021-06-05 04:41:01,471 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 04:41:01,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:41:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 04:41:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 332. [2021-06-05 04:41:01,474 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 04:41:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1024 transitions. [2021-06-05 04:41:01,474 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1024 transitions. Word has length 20 [2021-06-05 04:41:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:01,474 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1024 transitions. [2021-06-05 04:41:01,474 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 04:41:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1024 transitions. [2021-06-05 04:41:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:01,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:01,475 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:01,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1400 [2021-06-05 04:41:01,675 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1000341435, now seen corresponding path program 137 times [2021-06-05 04:41:01,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:01,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191240089] [2021-06-05 04:41:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:01,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:01,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191240089] [2021-06-05 04:41:01,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191240089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:01,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517010960] [2021-06-05 04:41:01,725 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 04:41:01,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:01,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:01,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:01,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:01,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517010960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:01,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:01,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:01,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651679493] [2021-06-05 04:41:01,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:01,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:01,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:01,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:01,879 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 04:41:02,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:02,052 INFO L93 Difference]: Finished difference Result 400 states and 1205 transitions. [2021-06-05 04:41:02,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:02,052 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 04:41:02,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:02,053 INFO L225 Difference]: With dead ends: 400 [2021-06-05 04:41:02,053 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 04:41:02,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:41:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 04:41:02,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 329. [2021-06-05 04:41:02,056 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 04:41:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1012 transitions. [2021-06-05 04:41:02,056 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1012 transitions. Word has length 20 [2021-06-05 04:41:02,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:02,057 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1012 transitions. [2021-06-05 04:41:02,057 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 04:41:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1012 transitions. [2021-06-05 04:41:02,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:02,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:02,057 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 04:41:02,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:02,257 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:02,258 INFO L82 PathProgramCache]: Analyzing trace with hash 357143421, now seen corresponding path program 138 times [2021-06-05 04:41:02,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:02,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682899451] [2021-06-05 04:41:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:02,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:02,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682899451] [2021-06-05 04:41:02,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682899451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:02,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811601941] [2021-06-05 04:41:02,310 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 04:41:02,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:41:02,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:02,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:02,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:02,465 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 04:41:02,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811601941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:02,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:02,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:02,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315231935] [2021-06-05 04:41:02,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:02,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:02,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:02,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:02,466 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 04:41:02,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:02,607 INFO L93 Difference]: Finished difference Result 407 states and 1195 transitions. [2021-06-05 04:41:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:02,607 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 04:41:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:02,607 INFO L225 Difference]: With dead ends: 407 [2021-06-05 04:41:02,607 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 04:41:02,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:41:02,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 04:41:02,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 343. [2021-06-05 04:41:02,611 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 04:41:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1051 transitions. [2021-06-05 04:41:02,611 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1051 transitions. Word has length 20 [2021-06-05 04:41:02,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:02,611 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1051 transitions. [2021-06-05 04:41:02,611 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 04:41:02,611 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1051 transitions. [2021-06-05 04:41:02,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:02,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:02,612 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:02,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1412,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:02,817 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:02,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:02,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1558280505, now seen corresponding path program 139 times [2021-06-05 04:41:02,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:02,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905613454] [2021-06-05 04:41:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:02,869 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 04:41:02,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:02,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905613454] [2021-06-05 04:41:02,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905613454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:02,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011351516] [2021-06-05 04:41:02,869 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 04:41:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:02,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:03,024 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 04:41:03,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011351516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:03,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:03,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:03,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008159005] [2021-06-05 04:41:03,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:03,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:03,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:03,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:03,025 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 04:41:03,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:03,212 INFO L93 Difference]: Finished difference Result 413 states and 1216 transitions. [2021-06-05 04:41:03,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:41:03,212 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 04:41:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:03,213 INFO L225 Difference]: With dead ends: 413 [2021-06-05 04:41:03,213 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 04:41:03,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:41:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 04:41:03,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 341. [2021-06-05 04:41:03,216 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 04:41:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1046 transitions. [2021-06-05 04:41:03,217 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1046 transitions. Word has length 20 [2021-06-05 04:41:03,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:03,217 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1046 transitions. [2021-06-05 04:41:03,217 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 04:41:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1046 transitions. [2021-06-05 04:41:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:03,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:03,217 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 04:41:03,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:03,418 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash -518044707, now seen corresponding path program 140 times [2021-06-05 04:41:03,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:03,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394394839] [2021-06-05 04:41:03,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:03,473 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 04:41:03,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:03,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394394839] [2021-06-05 04:41:03,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394394839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:03,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467429916] [2021-06-05 04:41:03,473 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 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 04:41:03,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:03,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:03,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:03,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:03,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:03,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467429916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:03,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:03,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:03,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248696328] [2021-06-05 04:41:03,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:03,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:03,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:03,617 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 04:41:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:03,781 INFO L93 Difference]: Finished difference Result 382 states and 1151 transitions. [2021-06-05 04:41:03,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:03,782 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 04:41:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:03,782 INFO L225 Difference]: With dead ends: 382 [2021-06-05 04:41:03,782 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 04:41:03,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:41:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 04:41:03,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 331. [2021-06-05 04:41:03,785 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 04:41:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1017 transitions. [2021-06-05 04:41:03,786 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1017 transitions. Word has length 20 [2021-06-05 04:41:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:03,786 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1017 transitions. [2021-06-05 04:41:03,786 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 04:41:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1017 transitions. [2021-06-05 04:41:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:03,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:03,786 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:03,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1426 [2021-06-05 04:41:03,987 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:03,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1938346827, now seen corresponding path program 141 times [2021-06-05 04:41:03,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:03,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353063031] [2021-06-05 04:41:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:04,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:04,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353063031] [2021-06-05 04:41:04,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353063031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:04,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973134783] [2021-06-05 04:41:04,040 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 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 04:41:04,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:41:04,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:04,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:04,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:04,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973134783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:04,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:04,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:04,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244841055] [2021-06-05 04:41:04,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:04,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:04,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:04,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:04,220 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 04:41:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:04,415 INFO L93 Difference]: Finished difference Result 406 states and 1204 transitions. [2021-06-05 04:41:04,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:04,415 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 04:41:04,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:04,416 INFO L225 Difference]: With dead ends: 406 [2021-06-05 04:41:04,416 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 04:41:04,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:41:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 04:41:04,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 339. [2021-06-05 04:41:04,419 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 04:41:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1048 transitions. [2021-06-05 04:41:04,419 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1048 transitions. Word has length 20 [2021-06-05 04:41:04,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:04,419 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1048 transitions. [2021-06-05 04:41:04,419 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 04:41:04,419 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1048 transitions. [2021-06-05 04:41:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:04,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:04,420 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:04,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-05 04:41:04,633 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:04,633 INFO L82 PathProgramCache]: Analyzing trace with hash 444439105, now seen corresponding path program 142 times [2021-06-05 04:41:04,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:04,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064282586] [2021-06-05 04:41:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:04,682 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 04:41:04,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:04,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064282586] [2021-06-05 04:41:04,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064282586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:04,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111803215] [2021-06-05 04:41:04,682 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 04:41:04,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:04,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:04,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:04,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:04,859 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 04:41:04,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111803215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:04,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:04,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:04,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853887408] [2021-06-05 04:41:04,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:04,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:04,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:04,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:04,860 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 04:41:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:05,054 INFO L93 Difference]: Finished difference Result 412 states and 1211 transitions. [2021-06-05 04:41:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:41:05,054 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 04:41:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:05,055 INFO L225 Difference]: With dead ends: 412 [2021-06-05 04:41:05,055 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 04:41:05,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:05,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 04:41:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 336. [2021-06-05 04:41:05,058 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 04:41:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1037 transitions. [2021-06-05 04:41:05,058 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1037 transitions. Word has length 20 [2021-06-05 04:41:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:05,058 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1037 transitions. [2021-06-05 04:41:05,058 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 04:41:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1037 transitions. [2021-06-05 04:41:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:05,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:05,059 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 04:41:05,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1445 [2021-06-05 04:41:05,259 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:05,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:05,259 INFO L82 PathProgramCache]: Analyzing trace with hash 982294683, now seen corresponding path program 143 times [2021-06-05 04:41:05,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:05,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130971847] [2021-06-05 04:41:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:05,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:05,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130971847] [2021-06-05 04:41:05,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130971847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:05,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228094561] [2021-06-05 04:41:05,308 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 04:41:05,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:05,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:05,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:05,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:05,474 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 04:41:05,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228094561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:05,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:05,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:05,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281492324] [2021-06-05 04:41:05,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:05,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:05,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:05,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:05,475 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 04:41:05,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:05,695 INFO L93 Difference]: Finished difference Result 376 states and 1129 transitions. [2021-06-05 04:41:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:05,695 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 04:41:05,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:05,696 INFO L225 Difference]: With dead ends: 376 [2021-06-05 04:41:05,696 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 04:41:05,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:41:05,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 04:41:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 333. [2021-06-05 04:41:05,699 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 04:41:05,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1026 transitions. [2021-06-05 04:41:05,699 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1026 transitions. Word has length 20 [2021-06-05 04:41:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:05,699 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1026 transitions. [2021-06-05 04:41:05,699 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 04:41:05,699 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1026 transitions. [2021-06-05 04:41:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:05,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:05,700 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 04:41:05,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1455 [2021-06-05 04:41:05,900 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash -538043371, now seen corresponding path program 144 times [2021-06-05 04:41:05,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:05,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002973771] [2021-06-05 04:41:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:05,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:05,955 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 04:41:05,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:05,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002973771] [2021-06-05 04:41:05,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002973771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:05,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134978521] [2021-06-05 04:41:05,955 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 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 04:41:06,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:41:06,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:06,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:06,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:06,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134978521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:06,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:06,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:06,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264110364] [2021-06-05 04:41:06,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:06,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:06,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:06,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:06,110 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 04:41:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:06,328 INFO L93 Difference]: Finished difference Result 493 states and 1422 transitions. [2021-06-05 04:41:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:41:06,328 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 04:41:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:06,329 INFO L225 Difference]: With dead ends: 493 [2021-06-05 04:41:06,329 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 04:41:06,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 04:41:06,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 341. [2021-06-05 04:41:06,332 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 04:41:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1062 transitions. [2021-06-05 04:41:06,333 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1062 transitions. Word has length 20 [2021-06-05 04:41:06,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:06,333 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1062 transitions. [2021-06-05 04:41:06,333 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 04:41:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1062 transitions. [2021-06-05 04:41:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:06,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:06,334 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 04:41:06,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-06-05 04:41:06,534 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:06,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:06,534 INFO L82 PathProgramCache]: Analyzing trace with hash -2031951093, now seen corresponding path program 145 times [2021-06-05 04:41:06,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:06,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082839023] [2021-06-05 04:41:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:06,587 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 04:41:06,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:06,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082839023] [2021-06-05 04:41:06,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082839023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:06,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571698504] [2021-06-05 04:41:06,587 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 04:41:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:06,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:06,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:06,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571698504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:06,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:06,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:06,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504433252] [2021-06-05 04:41:06,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:06,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:06,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:06,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:06,771 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 04:41:07,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:07,006 INFO L93 Difference]: Finished difference Result 499 states and 1423 transitions. [2021-06-05 04:41:07,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:41:07,007 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 04:41:07,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:07,007 INFO L225 Difference]: With dead ends: 499 [2021-06-05 04:41:07,007 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 04:41:07,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 04:41:07,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 344. [2021-06-05 04:41:07,011 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 04:41:07,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1064 transitions. [2021-06-05 04:41:07,011 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1064 transitions. Word has length 20 [2021-06-05 04:41:07,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:07,011 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1064 transitions. [2021-06-05 04:41:07,011 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 04:41:07,012 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1064 transitions. [2021-06-05 04:41:07,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:07,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:07,012 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:07,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1473 [2021-06-05 04:41:07,212 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:07,213 INFO L82 PathProgramCache]: Analyzing trace with hash 213357067, now seen corresponding path program 146 times [2021-06-05 04:41:07,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:07,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751324246] [2021-06-05 04:41:07,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:07,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:07,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751324246] [2021-06-05 04:41:07,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751324246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:07,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524240088] [2021-06-05 04:41:07,270 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 04:41:07,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:07,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:07,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:07,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:07,468 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 04:41:07,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524240088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:07,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:07,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:07,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809603137] [2021-06-05 04:41:07,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:07,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:07,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:07,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:07,468 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 04:41:07,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:07,591 INFO L93 Difference]: Finished difference Result 461 states and 1343 transitions. [2021-06-05 04:41:07,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:07,592 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 04:41:07,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:07,592 INFO L225 Difference]: With dead ends: 461 [2021-06-05 04:41:07,592 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 04:41:07,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:41:07,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 04:41:07,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 337. [2021-06-05 04:41:07,596 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 04:41:07,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1046 transitions. [2021-06-05 04:41:07,596 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1046 transitions. Word has length 20 [2021-06-05 04:41:07,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:07,596 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1046 transitions. [2021-06-05 04:41:07,596 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 04:41:07,596 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1046 transitions. [2021-06-05 04:41:07,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:07,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:07,597 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 04:41:07,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1487 [2021-06-05 04:41:07,797 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:07,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:07,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1505699467, now seen corresponding path program 147 times [2021-06-05 04:41:07,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:07,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788398105] [2021-06-05 04:41:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:07,853 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 04:41:07,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:07,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788398105] [2021-06-05 04:41:07,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788398105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:07,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198298012] [2021-06-05 04:41:07,853 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 04:41:07,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:41:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:07,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:07,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:08,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198298012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:08,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:08,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:08,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643989685] [2021-06-05 04:41:08,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:08,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:08,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:08,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:08,066 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 04:41:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:08,239 INFO L93 Difference]: Finished difference Result 424 states and 1261 transitions. [2021-06-05 04:41:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:08,239 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 04:41:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:08,240 INFO L225 Difference]: With dead ends: 424 [2021-06-05 04:41:08,240 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 04:41:08,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:41:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 04:41:08,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 334. [2021-06-05 04:41:08,243 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 04:41:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1031 transitions. [2021-06-05 04:41:08,244 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1031 transitions. Word has length 20 [2021-06-05 04:41:08,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:08,244 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1031 transitions. [2021-06-05 04:41:08,244 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 04:41:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1031 transitions. [2021-06-05 04:41:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:08,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:08,244 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 04:41:08,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1497 [2021-06-05 04:41:08,445 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:08,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:08,445 INFO L82 PathProgramCache]: Analyzing trace with hash 234093595, now seen corresponding path program 148 times [2021-06-05 04:41:08,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:08,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576009923] [2021-06-05 04:41:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:08,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:08,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576009923] [2021-06-05 04:41:08,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576009923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:08,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342821356] [2021-06-05 04:41:08,499 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 04:41:08,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:08,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:08,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:08,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:08,698 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 04:41:08,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342821356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:08,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:08,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:08,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733498309] [2021-06-05 04:41:08,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:08,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:08,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:08,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:08,699 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 04:41:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:08,937 INFO L93 Difference]: Finished difference Result 461 states and 1335 transitions. [2021-06-05 04:41:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:41:08,938 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 04:41:08,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:08,938 INFO L225 Difference]: With dead ends: 461 [2021-06-05 04:41:08,938 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 04:41:08,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:08,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 04:41:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 344. [2021-06-05 04:41:08,942 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 04:41:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1058 transitions. [2021-06-05 04:41:08,942 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1058 transitions. Word has length 20 [2021-06-05 04:41:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:08,942 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1058 transitions. [2021-06-05 04:41:08,942 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 04:41:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1058 transitions. [2021-06-05 04:41:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:08,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:08,943 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:09,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1511 [2021-06-05 04:41:09,149 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1681330331, now seen corresponding path program 149 times [2021-06-05 04:41:09,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:09,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678205805] [2021-06-05 04:41:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:09,205 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 04:41:09,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:09,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678205805] [2021-06-05 04:41:09,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678205805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:09,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137307138] [2021-06-05 04:41:09,205 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 04:41:09,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:41:09,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:09,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:09,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:09,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137307138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:09,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:09,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:09,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335552809] [2021-06-05 04:41:09,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:09,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:09,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:09,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:09,370 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 04:41:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:09,582 INFO L93 Difference]: Finished difference Result 438 states and 1296 transitions. [2021-06-05 04:41:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:41:09,583 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 04:41:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:09,583 INFO L225 Difference]: With dead ends: 438 [2021-06-05 04:41:09,583 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 04:41:09,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:09,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 04:41:09,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 333. [2021-06-05 04:41:09,586 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 04:41:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1026 transitions. [2021-06-05 04:41:09,587 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1026 transitions. Word has length 20 [2021-06-05 04:41:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:09,587 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1026 transitions. [2021-06-05 04:41:09,587 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 04:41:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1026 transitions. [2021-06-05 04:41:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:09,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:09,587 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 04:41:09,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1525 [2021-06-05 04:41:09,789 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:09,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:09,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1784764021, now seen corresponding path program 150 times [2021-06-05 04:41:09,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:09,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683118845] [2021-06-05 04:41:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:09,851 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 04:41:09,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:09,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683118845] [2021-06-05 04:41:09,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683118845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:09,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631867498] [2021-06-05 04:41:09,851 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 04:41:09,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:41:09,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:09,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:09,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:10,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631867498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:10,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:10,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:10,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694992712] [2021-06-05 04:41:10,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:10,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:10,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:10,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:10,043 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 04:41:10,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:10,233 INFO L93 Difference]: Finished difference Result 378 states and 1133 transitions. [2021-06-05 04:41:10,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:10,233 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 04:41:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:10,234 INFO L225 Difference]: With dead ends: 378 [2021-06-05 04:41:10,234 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 04:41:10,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:41:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 04:41:10,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 335. [2021-06-05 04:41:10,237 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 04:41:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2021-06-05 04:41:10,237 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 20 [2021-06-05 04:41:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:10,237 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2021-06-05 04:41:10,237 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 04:41:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2021-06-05 04:41:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:10,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:10,238 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:10,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:10,438 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:10,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1033363583, now seen corresponding path program 151 times [2021-06-05 04:41:10,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:10,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935253703] [2021-06-05 04:41:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:10,489 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 04:41:10,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:10,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935253703] [2021-06-05 04:41:10,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935253703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:10,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673507565] [2021-06-05 04:41:10,489 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 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 04:41:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:10,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:10,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:10,649 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 04:41:10,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673507565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:10,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:10,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:10,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109552842] [2021-06-05 04:41:10,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:10,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:10,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:10,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:10,649 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 04:41:10,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:10,880 INFO L93 Difference]: Finished difference Result 403 states and 1185 transitions. [2021-06-05 04:41:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:41:10,881 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 04:41:10,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:10,881 INFO L225 Difference]: With dead ends: 403 [2021-06-05 04:41:10,881 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 04:41:10,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:10,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 04:41:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 345. [2021-06-05 04:41:10,884 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 04:41:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1058 transitions. [2021-06-05 04:41:10,885 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1058 transitions. Word has length 20 [2021-06-05 04:41:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:10,885 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1058 transitions. [2021-06-05 04:41:10,885 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 04:41:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1058 transitions. [2021-06-05 04:41:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:10,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:10,885 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 04:41:11,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1544,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:11,093 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1346179787, now seen corresponding path program 152 times [2021-06-05 04:41:11,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:11,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277974069] [2021-06-05 04:41:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:11,163 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 04:41:11,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:11,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277974069] [2021-06-05 04:41:11,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277974069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:11,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506342293] [2021-06-05 04:41:11,163 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 04:41:11,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:11,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:11,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:11,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:11,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506342293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:11,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:11,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:11,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698836865] [2021-06-05 04:41:11,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:11,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:11,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:11,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:11,354 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 04:41:11,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:11,500 INFO L93 Difference]: Finished difference Result 374 states and 1131 transitions. [2021-06-05 04:41:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:11,500 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 04:41:11,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:11,501 INFO L225 Difference]: With dead ends: 374 [2021-06-05 04:41:11,501 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 04:41:11,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:41:11,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 04:41:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 332. [2021-06-05 04:41:11,503 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 04:41:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1021 transitions. [2021-06-05 04:41:11,504 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1021 transitions. Word has length 20 [2021-06-05 04:41:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:11,504 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1021 transitions. [2021-06-05 04:41:11,504 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 04:41:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1021 transitions. [2021-06-05 04:41:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:11,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:11,505 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:11,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1553 [2021-06-05 04:41:11,705 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:11,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:11,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1598821461, now seen corresponding path program 153 times [2021-06-05 04:41:11,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:11,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470044981] [2021-06-05 04:41:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:11,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:11,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470044981] [2021-06-05 04:41:11,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470044981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:11,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142377562] [2021-06-05 04:41:11,761 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 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 04:41:11,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:41:11,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:11,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:11,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:11,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142377562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:11,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:11,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:11,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740734928] [2021-06-05 04:41:11,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:11,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:11,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:11,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:11,902 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 04:41:12,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:12,054 INFO L93 Difference]: Finished difference Result 451 states and 1333 transitions. [2021-06-05 04:41:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:12,054 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 04:41:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:12,055 INFO L225 Difference]: With dead ends: 451 [2021-06-05 04:41:12,055 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 04:41:12,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 04:41:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 342. [2021-06-05 04:41:12,058 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 04:41:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1066 transitions. [2021-06-05 04:41:12,058 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1066 transitions. Word has length 20 [2021-06-05 04:41:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:12,058 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1066 transitions. [2021-06-05 04:41:12,059 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 04:41:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1066 transitions. [2021-06-05 04:41:12,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:12,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:12,059 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 04:41:12,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1563,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:12,259 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:12,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:12,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1202238113, now seen corresponding path program 154 times [2021-06-05 04:41:12,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:12,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454702597] [2021-06-05 04:41:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:12,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:12,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454702597] [2021-06-05 04:41:12,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454702597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:12,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558831045] [2021-06-05 04:41:12,314 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 04:41:12,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:12,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:12,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:12,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:12,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558831045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:12,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:12,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:12,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651120019] [2021-06-05 04:41:12,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:12,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:12,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:12,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:12,457 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 04:41:12,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:12,639 INFO L93 Difference]: Finished difference Result 457 states and 1334 transitions. [2021-06-05 04:41:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:12,639 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 04:41:12,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:12,640 INFO L225 Difference]: With dead ends: 457 [2021-06-05 04:41:12,640 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 04:41:12,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:12,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 04:41:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 345. [2021-06-05 04:41:12,643 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 04:41:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-06-05 04:41:12,644 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-06-05 04:41:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:12,644 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-06-05 04:41:12,644 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 04:41:12,644 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-06-05 04:41:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:12,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:12,644 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:12,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1573 [2021-06-05 04:41:12,845 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash -847421023, now seen corresponding path program 155 times [2021-06-05 04:41:12,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:12,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674405609] [2021-06-05 04:41:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:12,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:12,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674405609] [2021-06-05 04:41:12,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674405609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:12,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510375941] [2021-06-05 04:41:12,901 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 04:41:12,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:41:12,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:12,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:12,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:13,060 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 04:41:13,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510375941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:13,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:13,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:13,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621550241] [2021-06-05 04:41:13,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:13,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:13,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:13,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:13,061 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 04:41:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:13,252 INFO L93 Difference]: Finished difference Result 509 states and 1476 transitions. [2021-06-05 04:41:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:13,252 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 04:41:13,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:13,253 INFO L225 Difference]: With dead ends: 509 [2021-06-05 04:41:13,253 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 04:41:13,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:41:13,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 04:41:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 348. [2021-06-05 04:41:13,257 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 04:41:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1083 transitions. [2021-06-05 04:41:13,257 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1083 transitions. Word has length 20 [2021-06-05 04:41:13,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:13,257 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1083 transitions. [2021-06-05 04:41:13,257 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 04:41:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1083 transitions. [2021-06-05 04:41:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:13,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:13,258 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:13,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-06-05 04:41:13,473 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:13,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:13,474 INFO L82 PathProgramCache]: Analyzing trace with hash 444921377, now seen corresponding path program 156 times [2021-06-05 04:41:13,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:13,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637233552] [2021-06-05 04:41:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:13,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:13,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637233552] [2021-06-05 04:41:13,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637233552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:13,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893103262] [2021-06-05 04:41:13,530 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 04:41:13,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:41:13,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:13,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:13,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:13,675 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 04:41:13,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893103262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:13,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:13,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:13,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959954055] [2021-06-05 04:41:13,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:13,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:13,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:13,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:13,676 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 04:41:13,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:13,866 INFO L93 Difference]: Finished difference Result 472 states and 1394 transitions. [2021-06-05 04:41:13,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:13,866 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 04:41:13,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:13,867 INFO L225 Difference]: With dead ends: 472 [2021-06-05 04:41:13,867 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 04:41:13,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:41:13,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 04:41:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 345. [2021-06-05 04:41:13,870 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 04:41:13,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-06-05 04:41:13,871 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-06-05 04:41:13,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:13,871 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-06-05 04:41:13,871 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 04:41:13,871 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-06-05 04:41:13,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:13,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:13,872 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:14,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1595 [2021-06-05 04:41:14,072 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:14,072 INFO L82 PathProgramCache]: Analyzing trace with hash -826684495, now seen corresponding path program 157 times [2021-06-05 04:41:14,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:14,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67619826] [2021-06-05 04:41:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:14,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:14,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67619826] [2021-06-05 04:41:14,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67619826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:14,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665592457] [2021-06-05 04:41:14,125 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 04:41:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:14,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:14,287 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 04:41:14,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665592457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:14,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:14,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:14,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142967897] [2021-06-05 04:41:14,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:14,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:14,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:14,288 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 04:41:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:14,474 INFO L93 Difference]: Finished difference Result 497 states and 1428 transitions. [2021-06-05 04:41:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:14,474 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 04:41:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:14,474 INFO L225 Difference]: With dead ends: 497 [2021-06-05 04:41:14,474 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 04:41:14,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 04:41:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 349. [2021-06-05 04:41:14,478 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 04:41:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1082 transitions. [2021-06-05 04:41:14,479 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1082 transitions. Word has length 20 [2021-06-05 04:41:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:14,479 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1082 transitions. [2021-06-05 04:41:14,479 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 04:41:14,479 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1082 transitions. [2021-06-05 04:41:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:14,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:14,480 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:14,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1608,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:14,680 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:14,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:14,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1552858875, now seen corresponding path program 158 times [2021-06-05 04:41:14,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:14,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017953302] [2021-06-05 04:41:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:14,735 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 04:41:14,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:14,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017953302] [2021-06-05 04:41:14,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017953302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:14,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416234063] [2021-06-05 04:41:14,736 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 04:41:14,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:14,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:14,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:14,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:14,893 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 04:41:14,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416234063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:14,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:14,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:14,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575651026] [2021-06-05 04:41:14,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:14,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:14,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:14,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:14,894 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 04:41:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:15,130 INFO L93 Difference]: Finished difference Result 503 states and 1449 transitions. [2021-06-05 04:41:15,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:41:15,130 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 04:41:15,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:15,131 INFO L225 Difference]: With dead ends: 503 [2021-06-05 04:41:15,131 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 04:41:15,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:15,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 04:41:15,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 346. [2021-06-05 04:41:15,134 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 04:41:15,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1072 transitions. [2021-06-05 04:41:15,135 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1072 transitions. Word has length 20 [2021-06-05 04:41:15,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:15,135 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1072 transitions. [2021-06-05 04:41:15,135 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 04:41:15,135 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1072 transitions. [2021-06-05 04:41:15,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:15,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:15,136 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 04:41:15,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1617,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:15,336 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:15,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1335117643, now seen corresponding path program 159 times [2021-06-05 04:41:15,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:15,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498896078] [2021-06-05 04:41:15,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:15,394 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 04:41:15,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498896078] [2021-06-05 04:41:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498896078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328170111] [2021-06-05 04:41:15,394 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 04:41:15,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:41:15,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:15,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:15,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:15,568 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 04:41:15,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328170111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:15,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:15,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:15,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769860511] [2021-06-05 04:41:15,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:15,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:15,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:15,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:15,569 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 04:41:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:15,792 INFO L93 Difference]: Finished difference Result 433 states and 1294 transitions. [2021-06-05 04:41:15,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:15,792 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 04:41:15,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:15,793 INFO L225 Difference]: With dead ends: 433 [2021-06-05 04:41:15,793 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 04:41:15,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 04:41:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 347. [2021-06-05 04:41:15,796 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 04:41:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1074 transitions. [2021-06-05 04:41:15,796 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1074 transitions. Word has length 20 [2021-06-05 04:41:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:15,797 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1074 transitions. [2021-06-05 04:41:15,797 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 04:41:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1074 transitions. [2021-06-05 04:41:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:15,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:15,797 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:16,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1626,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:16,001 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:16,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1667507253, now seen corresponding path program 160 times [2021-06-05 04:41:16,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:16,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284143545] [2021-06-05 04:41:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:16,066 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 04:41:16,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:16,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284143545] [2021-06-05 04:41:16,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284143545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:16,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213097262] [2021-06-05 04:41:16,066 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 04:41:16,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:16,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:16,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:16,230 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 04:41:16,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213097262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:16,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:16,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:16,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800137498] [2021-06-05 04:41:16,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:16,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:16,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:16,230 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 04:41:16,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:16,438 INFO L93 Difference]: Finished difference Result 421 states and 1261 transitions. [2021-06-05 04:41:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:16,438 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 04:41:16,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:16,439 INFO L225 Difference]: With dead ends: 421 [2021-06-05 04:41:16,439 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 04:41:16,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 04:41:16,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 336. [2021-06-05 04:41:16,442 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 04:41:16,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1037 transitions. [2021-06-05 04:41:16,442 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1037 transitions. Word has length 20 [2021-06-05 04:41:16,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:16,442 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1037 transitions. [2021-06-05 04:41:16,442 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 04:41:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1037 transitions. [2021-06-05 04:41:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:16,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:16,443 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:16,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1637,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:16,643 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:16,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:16,644 INFO L82 PathProgramCache]: Analyzing trace with hash 731595007, now seen corresponding path program 161 times [2021-06-05 04:41:16,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:16,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196228486] [2021-06-05 04:41:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:16,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:16,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196228486] [2021-06-05 04:41:16,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196228486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:16,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481278436] [2021-06-05 04:41:16,701 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 04:41:16,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:16,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:16,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:16,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:16,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481278436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:16,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:16,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:16,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923419241] [2021-06-05 04:41:16,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:16,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:16,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:16,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:16,843 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 04:41:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:17,056 INFO L93 Difference]: Finished difference Result 376 states and 1139 transitions. [2021-06-05 04:41:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:17,057 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 04:41:17,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:17,057 INFO L225 Difference]: With dead ends: 376 [2021-06-05 04:41:17,057 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 04:41:17,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 212.1ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:41:17,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 04:41:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 333. [2021-06-05 04:41:17,060 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 04:41:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1025 transitions. [2021-06-05 04:41:17,061 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1025 transitions. Word has length 20 [2021-06-05 04:41:17,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:17,061 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1025 transitions. [2021-06-05 04:41:17,061 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 04:41:17,061 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1025 transitions. [2021-06-05 04:41:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:17,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:17,061 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 04:41:17,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1644 [2021-06-05 04:41:17,262 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash 88396993, now seen corresponding path program 162 times [2021-06-05 04:41:17,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:17,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158141965] [2021-06-05 04:41:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:17,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:17,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:17,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158141965] [2021-06-05 04:41:17,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158141965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:17,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102703977] [2021-06-05 04:41:17,312 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 04:41:17,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:41:17,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:17,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:17,481 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 04:41:17,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102703977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:17,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:17,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:17,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17059713] [2021-06-05 04:41:17,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:17,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:17,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:17,482 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 04:41:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:17,683 INFO L93 Difference]: Finished difference Result 421 states and 1233 transitions. [2021-06-05 04:41:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:17,683 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 04:41:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:17,684 INFO L225 Difference]: With dead ends: 421 [2021-06-05 04:41:17,684 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 04:41:17,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:17,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 04:41:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 347. [2021-06-05 04:41:17,687 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 04:41:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1064 transitions. [2021-06-05 04:41:17,687 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1064 transitions. Word has length 20 [2021-06-05 04:41:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:17,688 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1064 transitions. [2021-06-05 04:41:17,688 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 04:41:17,688 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1064 transitions. [2021-06-05 04:41:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:17,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:17,688 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 04:41:17,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1653 [2021-06-05 04:41:17,889 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:17,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:17,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1827026933, now seen corresponding path program 163 times [2021-06-05 04:41:17,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:17,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795591482] [2021-06-05 04:41:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:17,941 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 04:41:17,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:17,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795591482] [2021-06-05 04:41:17,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795591482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:17,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723561854] [2021-06-05 04:41:17,941 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 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 04:41:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:17,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:17,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:18,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723561854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:18,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:18,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:18,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251412939] [2021-06-05 04:41:18,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:18,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:18,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:18,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:18,113 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 04:41:18,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:18,343 INFO L93 Difference]: Finished difference Result 427 states and 1254 transitions. [2021-06-05 04:41:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:41:18,343 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 04:41:18,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:18,344 INFO L225 Difference]: With dead ends: 427 [2021-06-05 04:41:18,344 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 04:41:18,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:18,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 04:41:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 345. [2021-06-05 04:41:18,347 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 04:41:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1059 transitions. [2021-06-05 04:41:18,348 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1059 transitions. Word has length 20 [2021-06-05 04:41:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:18,348 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1059 transitions. [2021-06-05 04:41:18,348 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 04:41:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1059 transitions. [2021-06-05 04:41:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:18,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:18,349 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 04:41:18,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-06-05 04:41:18,557 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:18,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:18,557 INFO L82 PathProgramCache]: Analyzing trace with hash -786791135, now seen corresponding path program 164 times [2021-06-05 04:41:18,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:18,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343981161] [2021-06-05 04:41:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:18,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:18,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343981161] [2021-06-05 04:41:18,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343981161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:18,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188039386] [2021-06-05 04:41:18,625 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 04:41:18,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:18,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:18,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:18,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:18,761 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 04:41:18,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188039386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:18,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:18,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:18,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069905722] [2021-06-05 04:41:18,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:18,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:18,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:18,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:18,762 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 04:41:18,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:18,927 INFO L93 Difference]: Finished difference Result 396 states and 1189 transitions. [2021-06-05 04:41:18,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:18,927 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 04:41:18,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:18,928 INFO L225 Difference]: With dead ends: 396 [2021-06-05 04:41:18,928 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 04:41:18,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:41:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 04:41:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 332. [2021-06-05 04:41:18,931 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 04:41:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1021 transitions. [2021-06-05 04:41:18,931 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1021 transitions. Word has length 20 [2021-06-05 04:41:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:18,931 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1021 transitions. [2021-06-05 04:41:18,931 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 04:41:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1021 transitions. [2021-06-05 04:41:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:18,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:18,932 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:19,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-06-05 04:41:19,132 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:19,132 INFO L82 PathProgramCache]: Analyzing trace with hash 812958331, now seen corresponding path program 165 times [2021-06-05 04:41:19,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:19,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450117782] [2021-06-05 04:41:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:19,180 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 04:41:19,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:19,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450117782] [2021-06-05 04:41:19,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450117782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:19,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004363672] [2021-06-05 04:41:19,180 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 04:41:19,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:41:19,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:19,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:19,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:19,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004363672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:19,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:19,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:19,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585597161] [2021-06-05 04:41:19,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:19,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:19,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:19,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:19,309 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 04:41:19,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:19,447 INFO L93 Difference]: Finished difference Result 366 states and 1100 transitions. [2021-06-05 04:41:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:19,448 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 04:41:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:19,448 INFO L225 Difference]: With dead ends: 366 [2021-06-05 04:41:19,448 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 04:41:19,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:41:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 04:41:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 336. [2021-06-05 04:41:19,451 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 04:41:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1031 transitions. [2021-06-05 04:41:19,452 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1031 transitions. Word has length 20 [2021-06-05 04:41:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:19,452 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1031 transitions. [2021-06-05 04:41:19,452 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 04:41:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1031 transitions. [2021-06-05 04:41:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:19,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:19,452 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 04:41:19,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1679,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:19,668 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:19,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:19,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1564358769, now seen corresponding path program 166 times [2021-06-05 04:41:19,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:19,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576374024] [2021-06-05 04:41:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:19,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:19,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576374024] [2021-06-05 04:41:19,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576374024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:19,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425078196] [2021-06-05 04:41:19,713 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 04:41:19,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:19,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:19,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:19,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:19,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425078196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:19,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:19,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:19,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60367440] [2021-06-05 04:41:19,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:19,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:19,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:19,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:19,847 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 04:41:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:20,029 INFO L93 Difference]: Finished difference Result 391 states and 1152 transitions. [2021-06-05 04:41:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:41:20,030 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 04:41:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:20,030 INFO L225 Difference]: With dead ends: 391 [2021-06-05 04:41:20,030 INFO L226 Difference]: Without dead ends: 385 [2021-06-05 04:41:20,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-06-05 04:41:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 346. [2021-06-05 04:41:20,033 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 04:41:20,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1058 transitions. [2021-06-05 04:41:20,034 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1058 transitions. Word has length 20 [2021-06-05 04:41:20,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:20,034 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1058 transitions. [2021-06-05 04:41:20,034 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 04:41:20,034 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1058 transitions. [2021-06-05 04:41:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:20,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:20,034 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 04:41:20,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1685 [2021-06-05 04:41:20,235 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:20,235 INFO L82 PathProgramCache]: Analyzing trace with hash -351065157, now seen corresponding path program 167 times [2021-06-05 04:41:20,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:20,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730974775] [2021-06-05 04:41:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:20,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:20,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730974775] [2021-06-05 04:41:20,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730974775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:20,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982115587] [2021-06-05 04:41:20,282 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 04:41:20,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:41:20,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:20,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:20,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:20,410 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 04:41:20,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982115587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:20,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:20,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:20,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730921048] [2021-06-05 04:41:20,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:20,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:20,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:20,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:20,411 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 04:41:20,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:20,534 INFO L93 Difference]: Finished difference Result 362 states and 1098 transitions. [2021-06-05 04:41:20,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:20,534 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 04:41:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:20,535 INFO L225 Difference]: With dead ends: 362 [2021-06-05 04:41:20,535 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 04:41:20,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:20,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 04:41:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 334. [2021-06-05 04:41:20,538 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 04:41:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1026 transitions. [2021-06-05 04:41:20,538 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1026 transitions. Word has length 20 [2021-06-05 04:41:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:20,538 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1026 transitions. [2021-06-05 04:41:20,538 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 04:41:20,538 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1026 transitions. [2021-06-05 04:41:20,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:20,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:20,539 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:20,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1691,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:20,739 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:20,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:20,739 INFO L82 PathProgramCache]: Analyzing trace with hash -548069861, now seen corresponding path program 168 times [2021-06-05 04:41:20,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:20,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008700841] [2021-06-05 04:41:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:20,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:20,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008700841] [2021-06-05 04:41:20,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008700841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:20,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075229273] [2021-06-05 04:41:20,785 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 04:41:20,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:41:20,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:20,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:20,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:20,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075229273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:20,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:20,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:20,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458656767] [2021-06-05 04:41:20,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:20,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:20,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:20,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:20,914 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 04:41:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:21,023 INFO L93 Difference]: Finished difference Result 397 states and 1167 transitions. [2021-06-05 04:41:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:21,023 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 04:41:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:21,024 INFO L225 Difference]: With dead ends: 397 [2021-06-05 04:41:21,024 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 04:41:21,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:41:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 04:41:21,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 348. [2021-06-05 04:41:21,027 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 04:41:21,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1065 transitions. [2021-06-05 04:41:21,027 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1065 transitions. Word has length 20 [2021-06-05 04:41:21,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:21,027 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1065 transitions. [2021-06-05 04:41:21,027 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 04:41:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1065 transitions. [2021-06-05 04:41:21,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:21,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:21,028 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:21,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-06-05 04:41:21,228 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:21,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:21,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1831473509, now seen corresponding path program 169 times [2021-06-05 04:41:21,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:21,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808703292] [2021-06-05 04:41:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:21,275 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 04:41:21,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:21,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808703292] [2021-06-05 04:41:21,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808703292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:21,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621342603] [2021-06-05 04:41:21,275 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 04:41:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:21,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:21,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:21,394 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 04:41:21,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621342603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:21,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:21,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:21,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286331954] [2021-06-05 04:41:21,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:21,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:21,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:21,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:21,395 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 04:41:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:21,509 INFO L93 Difference]: Finished difference Result 397 states and 1173 transitions. [2021-06-05 04:41:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:41:21,510 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 04:41:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:21,510 INFO L225 Difference]: With dead ends: 397 [2021-06-05 04:41:21,510 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 04:41:21,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:41:21,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 04:41:21,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 346. [2021-06-05 04:41:21,513 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 04:41:21,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1060 transitions. [2021-06-05 04:41:21,514 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1060 transitions. Word has length 20 [2021-06-05 04:41:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:21,514 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1060 transitions. [2021-06-05 04:41:21,514 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 04:41:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1060 transitions. [2021-06-05 04:41:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:21,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:21,514 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:21,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:21,716 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:21,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:21,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1423257989, now seen corresponding path program 170 times [2021-06-05 04:41:21,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:21,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130775498] [2021-06-05 04:41:21,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:21,762 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 04:41:21,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:21,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130775498] [2021-06-05 04:41:21,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130775498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:21,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362669185] [2021-06-05 04:41:21,762 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 04:41:21,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:21,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:21,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:21,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:21,868 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 04:41:21,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362669185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:21,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:21,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:41:21,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485712827] [2021-06-05 04:41:21,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:41:21,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:41:21,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:41:21,869 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 04:41:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:21,966 INFO L93 Difference]: Finished difference Result 372 states and 1123 transitions. [2021-06-05 04:41:21,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:21,967 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 04:41:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:21,967 INFO L225 Difference]: With dead ends: 372 [2021-06-05 04:41:21,967 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 04:41:21,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:21,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 04:41:21,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 334. [2021-06-05 04:41:21,970 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 04:41:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1026 transitions. [2021-06-05 04:41:21,970 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1026 transitions. Word has length 20 [2021-06-05 04:41:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:21,971 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1026 transitions. [2021-06-05 04:41:21,971 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 04:41:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1026 transitions. [2021-06-05 04:41:21,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:21,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:21,971 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:22,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-06-05 04:41:22,172 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:22,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:22,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1541923549, now seen corresponding path program 171 times [2021-06-05 04:41:22,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:22,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523244623] [2021-06-05 04:41:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:22,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:22,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523244623] [2021-06-05 04:41:22,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523244623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:22,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073674517] [2021-06-05 04:41:22,241 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 04:41:22,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:41:22,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:22,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:22,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:22,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073674517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:22,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:22,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:22,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355723291] [2021-06-05 04:41:22,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:22,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:22,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:22,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:22,469 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 04:41:22,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:22,909 INFO L93 Difference]: Finished difference Result 550 states and 1636 transitions. [2021-06-05 04:41:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:22,910 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 04:41:22,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:22,910 INFO L225 Difference]: With dead ends: 550 [2021-06-05 04:41:22,910 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 04:41:22,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 458.5ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:22,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 04:41:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 345. [2021-06-05 04:41:22,914 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 04:41:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1068 transitions. [2021-06-05 04:41:22,914 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1068 transitions. Word has length 20 [2021-06-05 04:41:22,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:22,915 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1068 transitions. [2021-06-05 04:41:22,915 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 04:41:22,915 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1068 transitions. [2021-06-05 04:41:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:22,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:22,915 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 04:41:23,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:23,116 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1259136025, now seen corresponding path program 172 times [2021-06-05 04:41:23,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:23,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669085650] [2021-06-05 04:41:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:23,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:23,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669085650] [2021-06-05 04:41:23,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669085650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:23,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208879778] [2021-06-05 04:41:23,175 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 04:41:23,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:23,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:23,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:23,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:23,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208879778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:23,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:23,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:23,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051998275] [2021-06-05 04:41:23,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:23,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:23,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:23,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:23,355 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 04:41:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:23,685 INFO L93 Difference]: Finished difference Result 556 states and 1643 transitions. [2021-06-05 04:41:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:41:23,685 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 04:41:23,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:23,686 INFO L225 Difference]: With dead ends: 556 [2021-06-05 04:41:23,686 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 04:41:23,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:41:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 04:41:23,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 342. [2021-06-05 04:41:23,690 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 04:41:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1057 transitions. [2021-06-05 04:41:23,690 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1057 transitions. Word has length 20 [2021-06-05 04:41:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:23,690 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1057 transitions. [2021-06-05 04:41:23,690 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 04:41:23,690 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1057 transitions. [2021-06-05 04:41:23,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:23,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:23,691 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 04:41:23,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1723 [2021-06-05 04:41:23,891 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:23,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:23,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1796991603, now seen corresponding path program 173 times [2021-06-05 04:41:23,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:23,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142715511] [2021-06-05 04:41:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:23,953 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 04:41:23,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:23,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142715511] [2021-06-05 04:41:23,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142715511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:23,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51298961] [2021-06-05 04:41:23,954 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 04:41:24,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:24,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:24,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:24,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:24,149 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 04:41:24,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51298961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:24,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:24,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:24,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444161518] [2021-06-05 04:41:24,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:24,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:24,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:24,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:24,150 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 04:41:24,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:24,426 INFO L93 Difference]: Finished difference Result 520 states and 1561 transitions. [2021-06-05 04:41:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:24,426 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 04:41:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:24,427 INFO L225 Difference]: With dead ends: 520 [2021-06-05 04:41:24,427 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 04:41:24,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:24,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 04:41:24,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 339. [2021-06-05 04:41:24,430 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 04:41:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1046 transitions. [2021-06-05 04:41:24,431 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1046 transitions. Word has length 20 [2021-06-05 04:41:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:24,431 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1046 transitions. [2021-06-05 04:41:24,431 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 04:41:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1046 transitions. [2021-06-05 04:41:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:24,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:24,431 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:24,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-05 04:41:24,632 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:24,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1910230371, now seen corresponding path program 174 times [2021-06-05 04:41:24,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:24,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727336982] [2021-06-05 04:41:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:24,692 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 04:41:24,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:24,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727336982] [2021-06-05 04:41:24,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727336982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:24,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962598160] [2021-06-05 04:41:24,692 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 04:41:24,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:41:24,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:24,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:24,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:24,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962598160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:24,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:24,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:24,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114583448] [2021-06-05 04:41:24,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:24,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:24,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:24,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:24,888 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 04:41:25,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:25,200 INFO L93 Difference]: Finished difference Result 552 states and 1621 transitions. [2021-06-05 04:41:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:25,201 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 04:41:25,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:25,201 INFO L225 Difference]: With dead ends: 552 [2021-06-05 04:41:25,201 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 04:41:25,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 335.8ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 04:41:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 336. [2021-06-05 04:41:25,205 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 04:41:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1035 transitions. [2021-06-05 04:41:25,205 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1035 transitions. Word has length 20 [2021-06-05 04:41:25,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:25,205 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1035 transitions. [2021-06-05 04:41:25,205 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 04:41:25,205 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1035 transitions. [2021-06-05 04:41:25,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:25,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:25,206 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:25,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1737,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:25,406 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:25,406 INFO L82 PathProgramCache]: Analyzing trace with hash 711573469, now seen corresponding path program 175 times [2021-06-05 04:41:25,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:25,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122297278] [2021-06-05 04:41:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:25,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:25,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122297278] [2021-06-05 04:41:25,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122297278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:25,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799252772] [2021-06-05 04:41:25,463 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 04:41:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:25,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:25,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799252772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:25,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:25,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:25,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186682820] [2021-06-05 04:41:25,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:25,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:25,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:25,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:25,685 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 04:41:25,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:25,935 INFO L93 Difference]: Finished difference Result 562 states and 1666 transitions. [2021-06-05 04:41:25,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:25,935 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 04:41:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:25,936 INFO L225 Difference]: With dead ends: 562 [2021-06-05 04:41:25,936 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 04:41:25,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 285.8ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 04:41:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 343. [2021-06-05 04:41:25,940 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 04:41:25,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1062 transitions. [2021-06-05 04:41:25,940 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1062 transitions. Word has length 20 [2021-06-05 04:41:25,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:25,940 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1062 transitions. [2021-06-05 04:41:25,940 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 04:41:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1062 transitions. [2021-06-05 04:41:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:25,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:25,941 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 04:41:26,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1746 [2021-06-05 04:41:26,141 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:26,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:26,141 INFO L82 PathProgramCache]: Analyzing trace with hash -782334253, now seen corresponding path program 176 times [2021-06-05 04:41:26,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:26,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292804463] [2021-06-05 04:41:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:26,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:26,194 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 04:41:26,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:26,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292804463] [2021-06-05 04:41:26,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292804463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:26,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871381536] [2021-06-05 04:41:26,194 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 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 04:41:26,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:26,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:26,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:26,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:26,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871381536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:26,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:26,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:26,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174486256] [2021-06-05 04:41:26,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:26,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:26,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:26,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:26,379 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 04:41:26,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:26,662 INFO L93 Difference]: Finished difference Result 568 states and 1673 transitions. [2021-06-05 04:41:26,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:41:26,662 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 04:41:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:26,663 INFO L225 Difference]: With dead ends: 568 [2021-06-05 04:41:26,663 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 04:41:26,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 04:41:26,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 340. [2021-06-05 04:41:26,667 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 04:41:26,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1051 transitions. [2021-06-05 04:41:26,667 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1051 transitions. Word has length 20 [2021-06-05 04:41:26,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:26,667 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1051 transitions. [2021-06-05 04:41:26,667 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 04:41:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1051 transitions. [2021-06-05 04:41:26,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:26,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:26,668 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:26,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1753,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:26,868 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:26,869 INFO L82 PathProgramCache]: Analyzing trace with hash -244478675, now seen corresponding path program 177 times [2021-06-05 04:41:26,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:26,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492379341] [2021-06-05 04:41:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:26,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:26,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:26,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492379341] [2021-06-05 04:41:26,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492379341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:26,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495103741] [2021-06-05 04:41:26,924 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 04:41:26,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:41:26,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:26,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:26,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:27,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495103741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:27,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:27,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:27,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50160336] [2021-06-05 04:41:27,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:27,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:27,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:27,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:27,142 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 04:41:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:27,397 INFO L93 Difference]: Finished difference Result 532 states and 1591 transitions. [2021-06-05 04:41:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:27,397 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 04:41:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:27,398 INFO L225 Difference]: With dead ends: 532 [2021-06-05 04:41:27,398 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 04:41:27,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 04:41:27,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 337. [2021-06-05 04:41:27,401 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 04:41:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-06-05 04:41:27,402 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-06-05 04:41:27,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:27,402 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-06-05 04:41:27,402 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 04:41:27,402 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-06-05 04:41:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:27,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:27,402 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:27,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1760 [2021-06-05 04:41:27,603 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:27,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:27,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1764816729, now seen corresponding path program 178 times [2021-06-05 04:41:27,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:27,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534593761] [2021-06-05 04:41:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:27,665 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 04:41:27,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:27,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534593761] [2021-06-05 04:41:27,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534593761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:27,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765425378] [2021-06-05 04:41:27,665 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 04:41:27,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:27,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:27,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:27,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:27,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765425378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:27,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:27,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:27,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064590703] [2021-06-05 04:41:27,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:27,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:27,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:27,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:27,888 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 04:41:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:28,299 INFO L93 Difference]: Finished difference Result 640 states and 1863 transitions. [2021-06-05 04:41:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:41:28,300 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 04:41:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:28,300 INFO L225 Difference]: With dead ends: 640 [2021-06-05 04:41:28,300 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 04:41:28,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 375.6ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:41:28,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 04:41:28,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 345. [2021-06-05 04:41:28,305 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 04:41:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1076 transitions. [2021-06-05 04:41:28,305 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1076 transitions. Word has length 20 [2021-06-05 04:41:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:28,305 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1076 transitions. [2021-06-05 04:41:28,305 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 04:41:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1076 transitions. [2021-06-05 04:41:28,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:28,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:28,306 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 04:41:28,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1770 [2021-06-05 04:41:28,506 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:28,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:28,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1036242845, now seen corresponding path program 179 times [2021-06-05 04:41:28,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:28,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968284785] [2021-06-05 04:41:28,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:28,582 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 04:41:28,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:28,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968284785] [2021-06-05 04:41:28,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968284785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:28,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157581661] [2021-06-05 04:41:28,582 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 04:41:28,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:28,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:28,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:28,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:28,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157581661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:28,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:28,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:28,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329902798] [2021-06-05 04:41:28,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:28,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:28,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:28,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:28,788 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 04:41:29,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:29,298 INFO L93 Difference]: Finished difference Result 646 states and 1864 transitions. [2021-06-05 04:41:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:41:29,298 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 04:41:29,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:29,299 INFO L225 Difference]: With dead ends: 646 [2021-06-05 04:41:29,299 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 04:41:29,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 534.1ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:41:29,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 04:41:29,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 348. [2021-06-05 04:41:29,303 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 04:41:29,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1078 transitions. [2021-06-05 04:41:29,304 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1078 transitions. Word has length 20 [2021-06-05 04:41:29,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:29,304 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1078 transitions. [2021-06-05 04:41:29,304 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 04:41:29,304 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1078 transitions. [2021-06-05 04:41:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:29,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:29,304 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 04:41:29,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1778,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:29,520 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:29,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1013416291, now seen corresponding path program 180 times [2021-06-05 04:41:29,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:29,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724627300] [2021-06-05 04:41:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:29,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:29,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724627300] [2021-06-05 04:41:29,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724627300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:29,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006444402] [2021-06-05 04:41:29,586 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 04:41:29,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:41:29,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:29,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:29,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:29,777 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 04:41:29,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006444402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:29,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:29,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:29,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449470741] [2021-06-05 04:41:29,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:29,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:29,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:29,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:29,778 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 04:41:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:30,030 INFO L93 Difference]: Finished difference Result 608 states and 1784 transitions. [2021-06-05 04:41:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:30,030 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 04:41:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:30,031 INFO L225 Difference]: With dead ends: 608 [2021-06-05 04:41:30,031 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 04:41:30,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 04:41:30,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 341. [2021-06-05 04:41:30,035 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 04:41:30,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1060 transitions. [2021-06-05 04:41:30,036 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1060 transitions. Word has length 20 [2021-06-05 04:41:30,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:30,036 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1060 transitions. [2021-06-05 04:41:30,036 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 04:41:30,036 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1060 transitions. [2021-06-05 04:41:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:30,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:30,036 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:30,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1794 [2021-06-05 04:41:30,241 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash 278926109, now seen corresponding path program 181 times [2021-06-05 04:41:30,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:30,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425388091] [2021-06-05 04:41:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:30,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:30,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425388091] [2021-06-05 04:41:30,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425388091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:30,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269977508] [2021-06-05 04:41:30,301 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 04:41:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:30,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269977508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:30,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:30,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:30,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12074539] [2021-06-05 04:41:30,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:30,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:30,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:30,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:30,537 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 04:41:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:30,821 INFO L93 Difference]: Finished difference Result 571 states and 1702 transitions. [2021-06-05 04:41:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:30,821 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 04:41:30,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:30,822 INFO L225 Difference]: With dead ends: 571 [2021-06-05 04:41:30,822 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 04:41:30,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:30,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 04:41:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 338. [2021-06-05 04:41:30,825 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 04:41:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1045 transitions. [2021-06-05 04:41:30,826 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1045 transitions. Word has length 20 [2021-06-05 04:41:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:30,826 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1045 transitions. [2021-06-05 04:41:30,826 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 04:41:30,826 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1045 transitions. [2021-06-05 04:41:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:30,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:30,826 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 04:41:31,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1804,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:31,027 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:31,027 INFO L82 PathProgramCache]: Analyzing trace with hash -992679763, now seen corresponding path program 182 times [2021-06-05 04:41:31,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:31,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459912573] [2021-06-05 04:41:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:31,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:31,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459912573] [2021-06-05 04:41:31,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459912573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:31,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027964433] [2021-06-05 04:41:31,085 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 04:41:31,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:31,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:31,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:31,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:31,274 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 04:41:31,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027964433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:31,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:31,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:31,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348318251] [2021-06-05 04:41:31,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:31,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:31,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:31,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:31,275 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 04:41:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:31,787 INFO L93 Difference]: Finished difference Result 608 states and 1776 transitions. [2021-06-05 04:41:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:41:31,787 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 04:41:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:31,788 INFO L225 Difference]: With dead ends: 608 [2021-06-05 04:41:31,788 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 04:41:31,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:41:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 04:41:31,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 348. [2021-06-05 04:41:31,792 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 04:41:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1072 transitions. [2021-06-05 04:41:31,792 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1072 transitions. Word has length 20 [2021-06-05 04:41:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:31,793 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1072 transitions. [2021-06-05 04:41:31,793 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 04:41:31,793 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1072 transitions. [2021-06-05 04:41:31,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:31,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:31,793 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:31,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1817,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:31,994 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:31,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:31,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1386863607, now seen corresponding path program 183 times [2021-06-05 04:41:31,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:31,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930930118] [2021-06-05 04:41:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:32,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:32,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930930118] [2021-06-05 04:41:32,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930930118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:32,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115416825] [2021-06-05 04:41:32,053 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 04:41:32,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:41:32,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:32,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:32,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:32,272 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 04:41:32,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115416825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:32,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:32,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:32,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535323032] [2021-06-05 04:41:32,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:32,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:32,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:32,273 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 04:41:32,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:32,660 INFO L93 Difference]: Finished difference Result 585 states and 1737 transitions. [2021-06-05 04:41:32,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:41:32,660 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 04:41:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:32,661 INFO L225 Difference]: With dead ends: 585 [2021-06-05 04:41:32,661 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 04:41:32,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:41:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 04:41:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 337. [2021-06-05 04:41:32,668 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 04:41:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-06-05 04:41:32,668 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-06-05 04:41:32,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:32,668 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-06-05 04:41:32,669 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 04:41:32,669 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-06-05 04:41:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:32,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:32,669 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 04:41:32,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1826,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:32,869 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1283429917, now seen corresponding path program 184 times [2021-06-05 04:41:32,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:32,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599141185] [2021-06-05 04:41:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:32,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:32,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599141185] [2021-06-05 04:41:32,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599141185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:32,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116364614] [2021-06-05 04:41:32,924 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 04:41:32,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:32,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:32,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:32,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:33,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116364614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:33,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:33,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:33,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374506973] [2021-06-05 04:41:33,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:33,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:33,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:33,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:33,116 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 04:41:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:33,377 INFO L93 Difference]: Finished difference Result 525 states and 1574 transitions. [2021-06-05 04:41:33,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:33,377 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 04:41:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:33,378 INFO L225 Difference]: With dead ends: 525 [2021-06-05 04:41:33,378 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 04:41:33,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:33,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 04:41:33,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 339. [2021-06-05 04:41:33,381 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 04:41:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1045 transitions. [2021-06-05 04:41:33,382 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1045 transitions. Word has length 20 [2021-06-05 04:41:33,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:33,382 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1045 transitions. [2021-06-05 04:41:33,382 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 04:41:33,382 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1045 transitions. [2021-06-05 04:41:33,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:33,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:33,383 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:33,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1839,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:33,583 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:33,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:33,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2034830355, now seen corresponding path program 185 times [2021-06-05 04:41:33,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:33,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396974802] [2021-06-05 04:41:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:33,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:33,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396974802] [2021-06-05 04:41:33,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396974802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:33,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030599618] [2021-06-05 04:41:33,641 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 04:41:33,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:33,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:33,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:33,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:33,857 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 04:41:33,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030599618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:33,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:33,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:33,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118680069] [2021-06-05 04:41:33,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:33,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:33,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:33,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:33,858 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 04:41:34,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:34,273 INFO L93 Difference]: Finished difference Result 550 states and 1626 transitions. [2021-06-05 04:41:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:41:34,274 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 04:41:34,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:34,274 INFO L225 Difference]: With dead ends: 550 [2021-06-05 04:41:34,274 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 04:41:34,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 469.2ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:41:34,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 04:41:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 349. [2021-06-05 04:41:34,278 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 04:41:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1072 transitions. [2021-06-05 04:41:34,278 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1072 transitions. Word has length 20 [2021-06-05 04:41:34,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:34,278 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1072 transitions. [2021-06-05 04:41:34,278 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 04:41:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1072 transitions. [2021-06-05 04:41:34,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:34,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:34,279 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:34,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1847,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:34,479 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:34,480 INFO L82 PathProgramCache]: Analyzing trace with hash 119406429, now seen corresponding path program 186 times [2021-06-05 04:41:34,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:34,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138001162] [2021-06-05 04:41:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:34,542 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 04:41:34,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:34,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138001162] [2021-06-05 04:41:34,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138001162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:34,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247658542] [2021-06-05 04:41:34,542 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 04:41:34,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:41:34,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:34,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:34,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:34,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247658542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:34,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:34,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:34,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086555918] [2021-06-05 04:41:34,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:34,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:34,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:34,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:34,766 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 04:41:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:35,039 INFO L93 Difference]: Finished difference Result 521 states and 1572 transitions. [2021-06-05 04:41:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:35,039 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 04:41:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:35,040 INFO L225 Difference]: With dead ends: 521 [2021-06-05 04:41:35,040 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 04:41:35,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 04:41:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 336. [2021-06-05 04:41:35,043 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 04:41:35,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1035 transitions. [2021-06-05 04:41:35,044 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1035 transitions. Word has length 20 [2021-06-05 04:41:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:35,044 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1035 transitions. [2021-06-05 04:41:35,044 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 04:41:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1035 transitions. [2021-06-05 04:41:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:35,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:35,044 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 04:41:35,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1856,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:35,245 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:35,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:35,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1789704275, now seen corresponding path program 187 times [2021-06-05 04:41:35,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:35,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119186293] [2021-06-05 04:41:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:35,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:35,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119186293] [2021-06-05 04:41:35,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119186293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:35,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106630565] [2021-06-05 04:41:35,293 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 04:41:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:35,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:35,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:35,473 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 04:41:35,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106630565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:35,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:35,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:35,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491689974] [2021-06-05 04:41:35,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:35,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:35,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:35,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:35,474 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 04:41:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:35,744 INFO L93 Difference]: Finished difference Result 615 states and 1779 transitions. [2021-06-05 04:41:35,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:35,744 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 04:41:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:35,745 INFO L225 Difference]: With dead ends: 615 [2021-06-05 04:41:35,745 INFO L226 Difference]: Without dead ends: 597 [2021-06-05 04:41:35,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 297.0ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-06-05 04:41:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 338. [2021-06-05 04:41:35,748 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 04:41:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1040 transitions. [2021-06-05 04:41:35,749 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1040 transitions. Word has length 20 [2021-06-05 04:41:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:35,749 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1040 transitions. [2021-06-05 04:41:35,749 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 04:41:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1040 transitions. [2021-06-05 04:41:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:35,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:35,749 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:35,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1865 [2021-06-05 04:41:35,950 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash 222651827, now seen corresponding path program 188 times [2021-06-05 04:41:35,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:35,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563839151] [2021-06-05 04:41:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:36,001 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 04:41:36,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:36,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563839151] [2021-06-05 04:41:36,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563839151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:36,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5739282] [2021-06-05 04:41:36,001 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 04:41:36,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:36,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:36,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:36,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:36,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5739282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:36,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:36,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:36,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018267952] [2021-06-05 04:41:36,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:36,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:36,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:36,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:36,187 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 04:41:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:36,527 INFO L93 Difference]: Finished difference Result 576 states and 1700 transitions. [2021-06-05 04:41:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:36,528 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 04:41:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:36,528 INFO L225 Difference]: With dead ends: 576 [2021-06-05 04:41:36,529 INFO L226 Difference]: Without dead ends: 564 [2021-06-05 04:41:36,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-05 04:41:36,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 340. [2021-06-05 04:41:36,532 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 04:41:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1045 transitions. [2021-06-05 04:41:36,533 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1045 transitions. Word has length 20 [2021-06-05 04:41:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:36,533 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1045 transitions. [2021-06-05 04:41:36,533 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 04:41:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1045 transitions. [2021-06-05 04:41:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:36,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:36,534 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 04:41:36,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1875,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:36,735 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:36,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:36,735 INFO L82 PathProgramCache]: Analyzing trace with hash 974052265, now seen corresponding path program 189 times [2021-06-05 04:41:36,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:36,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242929381] [2021-06-05 04:41:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:36,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:36,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:36,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242929381] [2021-06-05 04:41:36,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242929381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:36,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770686144] [2021-06-05 04:41:36,791 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 04:41:36,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:41:36,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:36,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:36,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:37,019 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 04:41:37,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770686144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:37,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:37,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:37,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388772924] [2021-06-05 04:41:37,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:37,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:37,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:37,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:37,020 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 04:41:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:37,527 INFO L93 Difference]: Finished difference Result 601 states and 1752 transitions. [2021-06-05 04:41:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:41:37,528 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 04:41:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:37,528 INFO L225 Difference]: With dead ends: 601 [2021-06-05 04:41:37,528 INFO L226 Difference]: Without dead ends: 595 [2021-06-05 04:41:37,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:41:37,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-06-05 04:41:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 350. [2021-06-05 04:41:37,532 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 04:41:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1072 transitions. [2021-06-05 04:41:37,533 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1072 transitions. Word has length 20 [2021-06-05 04:41:37,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:37,533 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1072 transitions. [2021-06-05 04:41:37,533 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 04:41:37,533 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1072 transitions. [2021-06-05 04:41:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:37,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:37,533 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:37,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1881 [2021-06-05 04:41:37,735 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:37,735 INFO L82 PathProgramCache]: Analyzing trace with hash -941371661, now seen corresponding path program 190 times [2021-06-05 04:41:37,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:37,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009049137] [2021-06-05 04:41:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:37,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:37,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009049137] [2021-06-05 04:41:37,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009049137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:37,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529653786] [2021-06-05 04:41:37,791 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 04:41:37,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:37,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:37,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:37,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:37,999 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 04:41:37,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529653786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:37,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:37,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:37,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236089159] [2021-06-05 04:41:37,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:37,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:37,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:37,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:37,999 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 04:41:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:38,303 INFO L93 Difference]: Finished difference Result 572 states and 1698 transitions. [2021-06-05 04:41:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:38,304 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 04:41:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:38,304 INFO L225 Difference]: With dead ends: 572 [2021-06-05 04:41:38,305 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 04:41:38,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 04:41:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 335. [2021-06-05 04:41:38,308 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 04:41:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1030 transitions. [2021-06-05 04:41:38,309 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1030 transitions. Word has length 20 [2021-06-05 04:41:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:38,309 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1030 transitions. [2021-06-05 04:41:38,309 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 04:41:38,309 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1030 transitions. [2021-06-05 04:41:38,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:38,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:38,309 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 04:41:38,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1889 [2021-06-05 04:41:38,510 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:38,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:38,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1839029821, now seen corresponding path program 191 times [2021-06-05 04:41:38,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:38,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073622917] [2021-06-05 04:41:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:38,561 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 04:41:38,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:38,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073622917] [2021-06-05 04:41:38,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073622917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:38,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953465702] [2021-06-05 04:41:38,561 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 04:41:38,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:38,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:38,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:38,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:38,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:38,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953465702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:38,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:38,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:38,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037743356] [2021-06-05 04:41:38,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:38,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:38,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:38,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:38,768 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 04:41:38,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:38,981 INFO L93 Difference]: Finished difference Result 433 states and 1285 transitions. [2021-06-05 04:41:38,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:38,982 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 04:41:38,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:38,982 INFO L225 Difference]: With dead ends: 433 [2021-06-05 04:41:38,982 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 04:41:38,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:38,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 04:41:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 343. [2021-06-05 04:41:38,986 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 04:41:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1061 transitions. [2021-06-05 04:41:38,986 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1061 transitions. Word has length 20 [2021-06-05 04:41:38,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:38,986 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1061 transitions. [2021-06-05 04:41:38,986 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 04:41:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1061 transitions. [2021-06-05 04:41:38,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:38,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:38,987 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:39,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1897,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:39,187 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:39,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash 962029753, now seen corresponding path program 192 times [2021-06-05 04:41:39,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:39,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640425636] [2021-06-05 04:41:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:39,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:39,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640425636] [2021-06-05 04:41:39,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640425636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:39,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361486852] [2021-06-05 04:41:39,254 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 04:41:39,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:41:39,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:39,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:39,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:39,451 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 04:41:39,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361486852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:39,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:39,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:39,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162509049] [2021-06-05 04:41:39,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:39,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:39,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:39,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:39,451 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 04:41:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:39,676 INFO L93 Difference]: Finished difference Result 439 states and 1292 transitions. [2021-06-05 04:41:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:41:39,677 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 04:41:39,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:39,677 INFO L225 Difference]: With dead ends: 439 [2021-06-05 04:41:39,677 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 04:41:39,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 04:41:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 340. [2021-06-05 04:41:39,680 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 04:41:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-06-05 04:41:39,681 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-06-05 04:41:39,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:39,681 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-06-05 04:41:39,681 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 04:41:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-06-05 04:41:39,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:39,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:39,681 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 04:41:39,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1905,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:39,882 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:39,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:39,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1499885331, now seen corresponding path program 193 times [2021-06-05 04:41:39,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:39,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378827807] [2021-06-05 04:41:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:39,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:39,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378827807] [2021-06-05 04:41:39,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378827807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:39,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259942879] [2021-06-05 04:41:39,933 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 04:41:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:39,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:39,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:40,117 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 04:41:40,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259942879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:40,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:40,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:40,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162650748] [2021-06-05 04:41:40,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:40,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:40,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:40,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:40,118 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 04:41:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:40,355 INFO L93 Difference]: Finished difference Result 403 states and 1210 transitions. [2021-06-05 04:41:40,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:40,355 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 04:41:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:40,356 INFO L225 Difference]: With dead ends: 403 [2021-06-05 04:41:40,356 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 04:41:40,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 04:41:40,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 337. [2021-06-05 04:41:40,359 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 04:41:40,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1039 transitions. [2021-06-05 04:41:40,359 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1039 transitions. Word has length 20 [2021-06-05 04:41:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:40,360 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1039 transitions. [2021-06-05 04:41:40,360 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 04:41:40,360 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1039 transitions. [2021-06-05 04:41:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:40,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:40,360 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:40,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1917,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:40,560 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:40,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:40,561 INFO L82 PathProgramCache]: Analyzing trace with hash -20452723, now seen corresponding path program 194 times [2021-06-05 04:41:40,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:40,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756229508] [2021-06-05 04:41:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:40,616 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 04:41:40,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:40,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756229508] [2021-06-05 04:41:40,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756229508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:40,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332630298] [2021-06-05 04:41:40,617 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 04:41:40,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:40,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:40,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:40,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:40,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332630298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:40,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:40,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:40,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039383107] [2021-06-05 04:41:40,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:40,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:40,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:40,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:40,790 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 04:41:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:41,071 INFO L93 Difference]: Finished difference Result 520 states and 1503 transitions. [2021-06-05 04:41:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:41:41,071 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 04:41:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:41,072 INFO L225 Difference]: With dead ends: 520 [2021-06-05 04:41:41,072 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 04:41:41,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:41:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 04:41:41,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 345. [2021-06-05 04:41:41,075 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 04:41:41,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1075 transitions. [2021-06-05 04:41:41,076 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1075 transitions. Word has length 20 [2021-06-05 04:41:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:41,076 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1075 transitions. [2021-06-05 04:41:41,076 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 04:41:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1075 transitions. [2021-06-05 04:41:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:41,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:41,076 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:41,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1927 [2021-06-05 04:41:41,277 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:41,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1514360445, now seen corresponding path program 195 times [2021-06-05 04:41:41,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:41,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940650031] [2021-06-05 04:41:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:41,331 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 04:41:41,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:41,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940650031] [2021-06-05 04:41:41,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940650031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:41,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385451661] [2021-06-05 04:41:41,332 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 04:41:41,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:41:41,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:41,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:41,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:41,506 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 04:41:41,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385451661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:41,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:41,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:41,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208547022] [2021-06-05 04:41:41,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:41,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:41,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:41,507 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 04:41:41,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:41,775 INFO L93 Difference]: Finished difference Result 526 states and 1504 transitions. [2021-06-05 04:41:41,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:41:41,775 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 04:41:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:41,776 INFO L225 Difference]: With dead ends: 526 [2021-06-05 04:41:41,776 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 04:41:41,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:41:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 04:41:41,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 348. [2021-06-05 04:41:41,779 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 04:41:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1077 transitions. [2021-06-05 04:41:41,780 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1077 transitions. Word has length 20 [2021-06-05 04:41:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:41,780 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1077 transitions. [2021-06-05 04:41:41,780 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 04:41:41,780 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1077 transitions. [2021-06-05 04:41:41,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:41,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:41,780 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:41,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1935,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:41,981 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:41,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:41,981 INFO L82 PathProgramCache]: Analyzing trace with hash 730947715, now seen corresponding path program 196 times [2021-06-05 04:41:41,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:41,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682630076] [2021-06-05 04:41:41,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:42,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:42,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682630076] [2021-06-05 04:41:42,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682630076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:42,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670994435] [2021-06-05 04:41:42,039 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 04:41:42,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:42,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:42,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:42,225 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 04:41:42,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670994435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:42,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:42,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:42,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544789206] [2021-06-05 04:41:42,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:42,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:42,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:42,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:42,226 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 04:41:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:42,390 INFO L93 Difference]: Finished difference Result 488 states and 1424 transitions. [2021-06-05 04:41:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:42,391 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 04:41:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:42,391 INFO L225 Difference]: With dead ends: 488 [2021-06-05 04:41:42,391 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 04:41:42,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:42,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 04:41:42,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 341. [2021-06-05 04:41:42,395 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 04:41:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1059 transitions. [2021-06-05 04:41:42,395 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1059 transitions. Word has length 20 [2021-06-05 04:41:42,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:42,395 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1059 transitions. [2021-06-05 04:41:42,395 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 04:41:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1059 transitions. [2021-06-05 04:41:42,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:42,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:42,396 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 04:41:42,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1943,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:42,596 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:42,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:42,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2023290115, now seen corresponding path program 197 times [2021-06-05 04:41:42,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:42,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390483933] [2021-06-05 04:41:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:42,657 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 04:41:42,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:42,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390483933] [2021-06-05 04:41:42,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390483933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:42,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163427063] [2021-06-05 04:41:42,657 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 04:41:42,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:41:42,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:42,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:42,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:42,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:42,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163427063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:42,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:42,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:42,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122694421] [2021-06-05 04:41:42,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:42,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:42,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:42,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:42,872 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 04:41:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:43,052 INFO L93 Difference]: Finished difference Result 451 states and 1342 transitions. [2021-06-05 04:41:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:43,052 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 04:41:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:43,052 INFO L225 Difference]: With dead ends: 451 [2021-06-05 04:41:43,052 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 04:41:43,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 04:41:43,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 338. [2021-06-05 04:41:43,056 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 04:41:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1044 transitions. [2021-06-05 04:41:43,056 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1044 transitions. Word has length 20 [2021-06-05 04:41:43,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:43,056 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1044 transitions. [2021-06-05 04:41:43,056 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 04:41:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1044 transitions. [2021-06-05 04:41:43,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:43,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:43,057 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 04:41:43,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1957 [2021-06-05 04:41:43,257 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash 751684243, now seen corresponding path program 198 times [2021-06-05 04:41:43,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:43,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067670019] [2021-06-05 04:41:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:43,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:43,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067670019] [2021-06-05 04:41:43,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067670019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:43,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214628288] [2021-06-05 04:41:43,312 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 04:41:43,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:41:43,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:43,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:43,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214628288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:43,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:43,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:43,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396040710] [2021-06-05 04:41:43,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:43,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:43,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:43,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:43,531 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 04:41:43,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:43,845 INFO L93 Difference]: Finished difference Result 488 states and 1416 transitions. [2021-06-05 04:41:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:41:43,845 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 04:41:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:43,846 INFO L225 Difference]: With dead ends: 488 [2021-06-05 04:41:43,846 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 04:41:43,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:41:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 04:41:43,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 348. [2021-06-05 04:41:43,849 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 04:41:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1071 transitions. [2021-06-05 04:41:43,850 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1071 transitions. Word has length 20 [2021-06-05 04:41:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:43,850 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1071 transitions. [2021-06-05 04:41:43,850 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 04:41:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1071 transitions. [2021-06-05 04:41:43,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:43,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:43,850 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:44,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1971 [2021-06-05 04:41:44,051 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:44,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1163739683, now seen corresponding path program 199 times [2021-06-05 04:41:44,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:44,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423731478] [2021-06-05 04:41:44,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:44,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:44,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423731478] [2021-06-05 04:41:44,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423731478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:44,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764732413] [2021-06-05 04:41:44,107 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 04:41:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:44,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:44,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:44,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764732413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:44,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:44,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:44,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092387391] [2021-06-05 04:41:44,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:44,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:44,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:44,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:44,280 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 04:41:44,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:44,555 INFO L93 Difference]: Finished difference Result 465 states and 1377 transitions. [2021-06-05 04:41:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:41:44,555 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 04:41:44,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:44,556 INFO L225 Difference]: With dead ends: 465 [2021-06-05 04:41:44,556 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 04:41:44,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:41:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 04:41:44,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 337. [2021-06-05 04:41:44,559 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 04:41:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1039 transitions. [2021-06-05 04:41:44,560 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1039 transitions. Word has length 20 [2021-06-05 04:41:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:44,560 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1039 transitions. [2021-06-05 04:41:44,560 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 04:41:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1039 transitions. [2021-06-05 04:41:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:44,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:44,560 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:44,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1980 [2021-06-05 04:41:44,761 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:44,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1267173373, now seen corresponding path program 200 times [2021-06-05 04:41:44,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:44,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795292808] [2021-06-05 04:41:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:44,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:44,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795292808] [2021-06-05 04:41:44,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795292808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:44,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762798443] [2021-06-05 04:41:44,817 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 04:41:44,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:44,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:44,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:44,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:45,017 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 04:41:45,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762798443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:45,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:45,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:45,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532843725] [2021-06-05 04:41:45,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:45,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:45,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:45,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:45,018 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 04:41:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:45,251 INFO L93 Difference]: Finished difference Result 405 states and 1214 transitions. [2021-06-05 04:41:45,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:45,251 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 04:41:45,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:45,252 INFO L225 Difference]: With dead ends: 405 [2021-06-05 04:41:45,252 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 04:41:45,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 04:41:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 339. [2021-06-05 04:41:45,255 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 04:41:45,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1044 transitions. [2021-06-05 04:41:45,255 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1044 transitions. Word has length 20 [2021-06-05 04:41:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:45,256 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1044 transitions. [2021-06-05 04:41:45,256 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 04:41:45,256 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1044 transitions. [2021-06-05 04:41:45,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:45,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:45,256 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:45,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1988,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:45,456 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:45,457 INFO L82 PathProgramCache]: Analyzing trace with hash -515772935, now seen corresponding path program 201 times [2021-06-05 04:41:45,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:45,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817638048] [2021-06-05 04:41:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:45,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:45,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817638048] [2021-06-05 04:41:45,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817638048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:45,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159206635] [2021-06-05 04:41:45,511 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 04:41:45,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:41:45,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:45,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:45,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159206635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:45,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:45,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:45,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935159528] [2021-06-05 04:41:45,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:45,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:45,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:45,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:45,731 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 04:41:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:46,014 INFO L93 Difference]: Finished difference Result 430 states and 1266 transitions. [2021-06-05 04:41:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:41:46,014 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 04:41:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:46,015 INFO L225 Difference]: With dead ends: 430 [2021-06-05 04:41:46,015 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 04:41:46,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 312.8ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:41:46,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 04:41:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 349. [2021-06-05 04:41:46,018 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 04:41:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1071 transitions. [2021-06-05 04:41:46,019 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1071 transitions. Word has length 20 [2021-06-05 04:41:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:46,019 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1071 transitions. [2021-06-05 04:41:46,019 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 04:41:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1071 transitions. [2021-06-05 04:41:46,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:46,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:46,019 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 04:41:46,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-06-05 04:41:46,220 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:46,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:46,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1863770435, now seen corresponding path program 202 times [2021-06-05 04:41:46,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:46,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179146426] [2021-06-05 04:41:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:46,274 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 04:41:46,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:46,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179146426] [2021-06-05 04:41:46,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179146426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:46,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048017020] [2021-06-05 04:41:46,275 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 04:41:46,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:46,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:46,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:46,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048017020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:46,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:46,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:46,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431700223] [2021-06-05 04:41:46,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:46,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:46,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:46,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:46,464 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 04:41:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:46,685 INFO L93 Difference]: Finished difference Result 401 states and 1212 transitions. [2021-06-05 04:41:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:46,685 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 04:41:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:46,686 INFO L225 Difference]: With dead ends: 401 [2021-06-05 04:41:46,686 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 04:41:46,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 04:41:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 336. [2021-06-05 04:41:46,689 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 04:41:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1034 transitions. [2021-06-05 04:41:46,690 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1034 transitions. Word has length 20 [2021-06-05 04:41:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:46,690 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1034 transitions. [2021-06-05 04:41:46,690 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 04:41:46,690 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1034 transitions. [2021-06-05 04:41:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:46,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:46,690 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 04:41:46,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2005,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:46,891 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:46,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1081230813, now seen corresponding path program 203 times [2021-06-05 04:41:46,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:46,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029082825] [2021-06-05 04:41:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:47,142 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 04:41:47,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:47,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029082825] [2021-06-05 04:41:47,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029082825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:47,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738764761] [2021-06-05 04:41:47,142 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 04:41:47,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:41:47,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:47,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:47,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:47,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738764761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:47,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:47,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:47,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848272778] [2021-06-05 04:41:47,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:47,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:47,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:47,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:47,352 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 04:41:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:47,534 INFO L93 Difference]: Finished difference Result 475 states and 1405 transitions. [2021-06-05 04:41:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:47,535 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 04:41:47,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:47,535 INFO L225 Difference]: With dead ends: 475 [2021-06-05 04:41:47,535 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 04:41:47,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 04:41:47,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 346. [2021-06-05 04:41:47,539 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 04:41:47,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1079 transitions. [2021-06-05 04:41:47,539 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1079 transitions. Word has length 20 [2021-06-05 04:41:47,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:47,539 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 1079 transitions. [2021-06-05 04:41:47,539 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 04:41:47,539 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1079 transitions. [2021-06-05 04:41:47,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:47,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:47,540 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:47,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-06-05 04:41:47,740 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1719828761, now seen corresponding path program 204 times [2021-06-05 04:41:47,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:47,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494526407] [2021-06-05 04:41:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:47,796 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 04:41:47,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:47,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494526407] [2021-06-05 04:41:47,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494526407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:47,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981645695] [2021-06-05 04:41:47,796 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 04:41:47,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:41:47,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:47,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:47,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:47,967 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 04:41:47,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981645695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:47,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:47,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:47,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688940590] [2021-06-05 04:41:47,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:47,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:47,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:47,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:47,967 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 04:41:48,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:48,151 INFO L93 Difference]: Finished difference Result 481 states and 1406 transitions. [2021-06-05 04:41:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:48,151 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 04:41:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:48,152 INFO L225 Difference]: With dead ends: 481 [2021-06-05 04:41:48,152 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 04:41:48,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 04:41:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 349. [2021-06-05 04:41:48,156 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 04:41:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-06-05 04:41:48,156 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-06-05 04:41:48,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:48,156 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-06-05 04:41:48,156 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 04:41:48,156 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-06-05 04:41:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:48,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:48,157 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 04:41:48,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:48,362 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:48,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:48,363 INFO L82 PathProgramCache]: Analyzing trace with hash -329830375, now seen corresponding path program 205 times [2021-06-05 04:41:48,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:48,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984886946] [2021-06-05 04:41:48,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:48,440 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 04:41:48,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:48,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984886946] [2021-06-05 04:41:48,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984886946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:48,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522956306] [2021-06-05 04:41:48,440 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 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 04:41:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:48,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:48,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:48,607 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 04:41:48,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522956306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:48,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:48,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:48,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370529537] [2021-06-05 04:41:48,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:48,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:48,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:48,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:48,608 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 04:41:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:48,816 INFO L93 Difference]: Finished difference Result 533 states and 1548 transitions. [2021-06-05 04:41:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:48,816 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 04:41:48,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:48,817 INFO L225 Difference]: With dead ends: 533 [2021-06-05 04:41:48,817 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 04:41:48,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 04:41:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 352. [2021-06-05 04:41:48,820 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 04:41:48,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1096 transitions. [2021-06-05 04:41:48,821 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1096 transitions. Word has length 20 [2021-06-05 04:41:48,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:48,821 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1096 transitions. [2021-06-05 04:41:48,821 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 04:41:48,821 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1096 transitions. [2021-06-05 04:41:48,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:48,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:48,822 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 04:41:49,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2033,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:49,022 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:49,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:49,022 INFO L82 PathProgramCache]: Analyzing trace with hash 962512025, now seen corresponding path program 206 times [2021-06-05 04:41:49,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:49,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768043215] [2021-06-05 04:41:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:49,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:49,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768043215] [2021-06-05 04:41:49,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768043215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:49,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464555725] [2021-06-05 04:41:49,080 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 04:41:49,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:49,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:49,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:49,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:49,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464555725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:49,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:49,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:49,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942011530] [2021-06-05 04:41:49,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:49,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:49,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:49,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:49,260 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 04:41:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:49,437 INFO L93 Difference]: Finished difference Result 496 states and 1466 transitions. [2021-06-05 04:41:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:49,438 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 04:41:49,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:49,438 INFO L225 Difference]: With dead ends: 496 [2021-06-05 04:41:49,438 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 04:41:49,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:49,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 04:41:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 349. [2021-06-05 04:41:49,442 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 04:41:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-06-05 04:41:49,442 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-06-05 04:41:49,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:49,442 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-06-05 04:41:49,442 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 04:41:49,443 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-06-05 04:41:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:49,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:49,443 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:49,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2043,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:49,643 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:49,644 INFO L82 PathProgramCache]: Analyzing trace with hash -309093847, now seen corresponding path program 207 times [2021-06-05 04:41:49,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:49,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179540946] [2021-06-05 04:41:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:49,702 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 04:41:49,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:49,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179540946] [2021-06-05 04:41:49,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179540946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:49,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499817322] [2021-06-05 04:41:49,703 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 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 04:41:49,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:41:49,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:49,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:49,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:49,856 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 04:41:49,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499817322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:49,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:49,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:49,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928990283] [2021-06-05 04:41:49,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:49,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:49,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:49,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:49,857 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 04:41:50,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:50,071 INFO L93 Difference]: Finished difference Result 521 states and 1500 transitions. [2021-06-05 04:41:50,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:50,071 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 04:41:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:50,071 INFO L225 Difference]: With dead ends: 521 [2021-06-05 04:41:50,071 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 04:41:50,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:50,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 04:41:50,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 353. [2021-06-05 04:41:50,075 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 04:41:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1095 transitions. [2021-06-05 04:41:50,076 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1095 transitions. Word has length 20 [2021-06-05 04:41:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:50,076 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1095 transitions. [2021-06-05 04:41:50,076 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 04:41:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1095 transitions. [2021-06-05 04:41:50,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:50,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:50,076 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:50,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2052,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:50,277 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:50,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:50,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2070449523, now seen corresponding path program 208 times [2021-06-05 04:41:50,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:50,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978138110] [2021-06-05 04:41:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:50,334 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 04:41:50,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:50,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978138110] [2021-06-05 04:41:50,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978138110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:50,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580497937] [2021-06-05 04:41:50,334 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 04:41:50,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:50,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:50,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:50,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:50,532 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 04:41:50,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580497937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:50,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:50,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:50,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034140305] [2021-06-05 04:41:50,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:50,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:50,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:50,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:50,533 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 04:41:50,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:50,794 INFO L93 Difference]: Finished difference Result 527 states and 1521 transitions. [2021-06-05 04:41:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:41:50,794 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 04:41:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:50,795 INFO L225 Difference]: With dead ends: 527 [2021-06-05 04:41:50,795 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 04:41:50,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 272.2ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:41:50,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 04:41:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 350. [2021-06-05 04:41:50,798 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 04:41:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1085 transitions. [2021-06-05 04:41:50,799 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1085 transitions. Word has length 20 [2021-06-05 04:41:50,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:50,799 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1085 transitions. [2021-06-05 04:41:50,799 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 04:41:50,799 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1085 transitions. [2021-06-05 04:41:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:50,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:50,799 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 04:41:51,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2062,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:51,000 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:51,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:51,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1852708291, now seen corresponding path program 209 times [2021-06-05 04:41:51,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:51,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470891996] [2021-06-05 04:41:51,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:51,060 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 04:41:51,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:51,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470891996] [2021-06-05 04:41:51,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470891996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:51,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565766347] [2021-06-05 04:41:51,060 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 04:41:51,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:41:51,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:51,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:51,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:51,226 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 04:41:51,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565766347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:51,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:51,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:51,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752052659] [2021-06-05 04:41:51,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:51,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:51,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:51,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:51,227 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 04:41:51,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:51,453 INFO L93 Difference]: Finished difference Result 457 states and 1366 transitions. [2021-06-05 04:41:51,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:51,453 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 04:41:51,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:51,454 INFO L225 Difference]: With dead ends: 457 [2021-06-05 04:41:51,454 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 04:41:51,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 04:41:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 351. [2021-06-05 04:41:51,457 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 04:41:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1087 transitions. [2021-06-05 04:41:51,458 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1087 transitions. Word has length 20 [2021-06-05 04:41:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:51,458 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1087 transitions. [2021-06-05 04:41:51,458 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 04:41:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1087 transitions. [2021-06-05 04:41:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:51,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:51,458 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 04:41:51,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2071,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:51,659 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:51,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1149916605, now seen corresponding path program 210 times [2021-06-05 04:41:51,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:51,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393328062] [2021-06-05 04:41:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:51,720 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 04:41:51,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:51,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393328062] [2021-06-05 04:41:51,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393328062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:51,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390267520] [2021-06-05 04:41:51,721 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 04:41:51,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:41:51,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:51,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:51,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:51,900 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 04:41:51,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390267520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:51,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:51,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:51,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130025484] [2021-06-05 04:41:51,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:51,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:51,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:51,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:51,901 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 04:41:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:52,190 INFO L93 Difference]: Finished difference Result 445 states and 1333 transitions. [2021-06-05 04:41:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:52,190 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 04:41:52,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:52,191 INFO L225 Difference]: With dead ends: 445 [2021-06-05 04:41:52,191 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 04:41:52,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:52,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 04:41:52,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 340. [2021-06-05 04:41:52,194 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 04:41:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-06-05 04:41:52,194 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-06-05 04:41:52,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:52,194 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-06-05 04:41:52,194 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 04:41:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-06-05 04:41:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:52,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:52,195 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:52,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2079,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:52,395 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1249185655, now seen corresponding path program 211 times [2021-06-05 04:41:52,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:52,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234320076] [2021-06-05 04:41:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:52,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234320076] [2021-06-05 04:41:52,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234320076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807612461] [2021-06-05 04:41:52,455 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 04:41:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:52,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:52,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:52,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807612461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:52,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:52,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:52,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362439716] [2021-06-05 04:41:52,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:52,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:52,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:52,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:52,616 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 04:41:52,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:52,862 INFO L93 Difference]: Finished difference Result 400 states and 1211 transitions. [2021-06-05 04:41:52,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:52,862 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 04:41:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:52,863 INFO L225 Difference]: With dead ends: 400 [2021-06-05 04:41:52,863 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 04:41:52,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 275.0ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 04:41:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 337. [2021-06-05 04:41:52,866 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 04:41:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1038 transitions. [2021-06-05 04:41:52,866 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1038 transitions. Word has length 20 [2021-06-05 04:41:52,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:52,866 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1038 transitions. [2021-06-05 04:41:52,866 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 04:41:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1038 transitions. [2021-06-05 04:41:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:52,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:52,867 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 04:41:53,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2086,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:53,067 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:53,068 INFO L82 PathProgramCache]: Analyzing trace with hash 605987641, now seen corresponding path program 212 times [2021-06-05 04:41:53,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:53,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446351746] [2021-06-05 04:41:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:53,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:53,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:53,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446351746] [2021-06-05 04:41:53,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446351746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:53,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508865037] [2021-06-05 04:41:53,127 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 04:41:53,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:53,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:53,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:53,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:53,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508865037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:53,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:53,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:53,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901921402] [2021-06-05 04:41:53,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:53,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:53,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:53,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:53,302 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 04:41:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:53,544 INFO L93 Difference]: Finished difference Result 445 states and 1305 transitions. [2021-06-05 04:41:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:53,544 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 04:41:53,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:53,545 INFO L225 Difference]: With dead ends: 445 [2021-06-05 04:41:53,545 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 04:41:53,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:53,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 04:41:53,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 351. [2021-06-05 04:41:53,548 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 04:41:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1077 transitions. [2021-06-05 04:41:53,548 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1077 transitions. Word has length 20 [2021-06-05 04:41:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:53,548 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1077 transitions. [2021-06-05 04:41:53,549 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 04:41:53,549 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1077 transitions. [2021-06-05 04:41:53,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:53,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:53,549 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 04:41:53,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2092,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:53,749 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:53,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:53,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1309436285, now seen corresponding path program 213 times [2021-06-05 04:41:53,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:53,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393578586] [2021-06-05 04:41:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:53,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:53,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:53,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393578586] [2021-06-05 04:41:53,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393578586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:53,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42766040] [2021-06-05 04:41:53,805 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 04:41:53,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:41:53,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:53,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:53,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:53,987 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 04:41:53,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42766040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:53,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:53,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:41:53,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751456269] [2021-06-05 04:41:53,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:41:53,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:53,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:41:53,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:41:53,988 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 04:41:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:54,244 INFO L93 Difference]: Finished difference Result 451 states and 1326 transitions. [2021-06-05 04:41:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:41:54,244 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 04:41:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:54,245 INFO L225 Difference]: With dead ends: 451 [2021-06-05 04:41:54,245 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 04:41:54,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 04:41:54,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 349. [2021-06-05 04:41:54,248 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 04:41:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1072 transitions. [2021-06-05 04:41:54,248 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1072 transitions. Word has length 20 [2021-06-05 04:41:54,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:54,248 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1072 transitions. [2021-06-05 04:41:54,248 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 04:41:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1072 transitions. [2021-06-05 04:41:54,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:54,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:54,249 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 04:41:54,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2101 [2021-06-05 04:41:54,449 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:54,449 INFO L82 PathProgramCache]: Analyzing trace with hash -269200487, now seen corresponding path program 214 times [2021-06-05 04:41:54,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:54,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866279168] [2021-06-05 04:41:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:54,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:54,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866279168] [2021-06-05 04:41:54,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866279168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:54,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099289774] [2021-06-05 04:41:54,504 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 04:41:54,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:54,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:54,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:54,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:54,694 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 04:41:54,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099289774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:54,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:54,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:54,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747376732] [2021-06-05 04:41:54,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:54,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:54,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:54,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:54,694 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 04:41:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:54,949 INFO L93 Difference]: Finished difference Result 420 states and 1261 transitions. [2021-06-05 04:41:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:54,950 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 04:41:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:54,950 INFO L225 Difference]: With dead ends: 420 [2021-06-05 04:41:54,950 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 04:41:54,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 04:41:54,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 336. [2021-06-05 04:41:54,953 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 04:41:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1034 transitions. [2021-06-05 04:41:54,954 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1034 transitions. Word has length 20 [2021-06-05 04:41:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:54,954 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1034 transitions. [2021-06-05 04:41:54,954 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 04:41:54,954 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1034 transitions. [2021-06-05 04:41:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:54,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:54,954 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 04:41:55,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2111 [2021-06-05 04:41:55,155 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:55,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:55,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1330548979, now seen corresponding path program 215 times [2021-06-05 04:41:55,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:55,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825095071] [2021-06-05 04:41:55,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:55,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:55,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825095071] [2021-06-05 04:41:55,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825095071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:55,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639118908] [2021-06-05 04:41:55,202 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 04:41:55,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:55,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:55,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:55,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:55,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639118908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:55,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:55,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:55,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125800708] [2021-06-05 04:41:55,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:55,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:55,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:55,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:55,357 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 04:41:55,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:55,516 INFO L93 Difference]: Finished difference Result 394 states and 1182 transitions. [2021-06-05 04:41:55,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:55,516 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 04:41:55,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:55,517 INFO L225 Difference]: With dead ends: 394 [2021-06-05 04:41:55,517 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 04:41:55,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 04:41:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 340. [2021-06-05 04:41:55,531 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 04:41:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1044 transitions. [2021-06-05 04:41:55,532 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1044 transitions. Word has length 20 [2021-06-05 04:41:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:55,532 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1044 transitions. [2021-06-05 04:41:55,532 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 04:41:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1044 transitions. [2021-06-05 04:41:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:55,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:55,532 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:55,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2120,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:55,733 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:55,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2081949417, now seen corresponding path program 216 times [2021-06-05 04:41:55,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:55,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499599382] [2021-06-05 04:41:55,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:55,781 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 04:41:55,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:55,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499599382] [2021-06-05 04:41:55,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499599382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:55,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920545237] [2021-06-05 04:41:55,782 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 04:41:55,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:41:55,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:55,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:55,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:55,940 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 04:41:55,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920545237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:55,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:55,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:55,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812675458] [2021-06-05 04:41:55,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:55,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:55,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:55,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:55,941 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 04:41:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:56,117 INFO L93 Difference]: Finished difference Result 419 states and 1234 transitions. [2021-06-05 04:41:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:41:56,117 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 04:41:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:56,118 INFO L225 Difference]: With dead ends: 419 [2021-06-05 04:41:56,118 INFO L226 Difference]: Without dead ends: 413 [2021-06-05 04:41:56,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:41:56,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-06-05 04:41:56,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 350. [2021-06-05 04:41:56,121 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 04:41:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1071 transitions. [2021-06-05 04:41:56,122 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1071 transitions. Word has length 20 [2021-06-05 04:41:56,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:56,122 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1071 transitions. [2021-06-05 04:41:56,122 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 04:41:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1071 transitions. [2021-06-05 04:41:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:56,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:56,122 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:56,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2125 [2021-06-05 04:41:56,323 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:56,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:56,323 INFO L82 PathProgramCache]: Analyzing trace with hash 166525491, now seen corresponding path program 217 times [2021-06-05 04:41:56,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:56,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21801636] [2021-06-05 04:41:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:56,372 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 04:41:56,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:56,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21801636] [2021-06-05 04:41:56,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21801636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:56,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086173354] [2021-06-05 04:41:56,373 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 04:41:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:56,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:56,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:56,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086173354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:56,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:56,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:56,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17686187] [2021-06-05 04:41:56,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:56,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:56,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:56,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:56,524 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 04:41:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:56,661 INFO L93 Difference]: Finished difference Result 390 states and 1180 transitions. [2021-06-05 04:41:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:56,662 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 04:41:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:56,662 INFO L225 Difference]: With dead ends: 390 [2021-06-05 04:41:56,662 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 04:41:56,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:41:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 04:41:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 338. [2021-06-05 04:41:56,665 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 04:41:56,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1039 transitions. [2021-06-05 04:41:56,666 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1039 transitions. Word has length 20 [2021-06-05 04:41:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:56,666 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1039 transitions. [2021-06-05 04:41:56,666 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 04:41:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1039 transitions. [2021-06-05 04:41:56,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:56,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:56,666 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:56,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2131,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:56,881 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash -30479213, now seen corresponding path program 218 times [2021-06-05 04:41:56,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:56,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210084210] [2021-06-05 04:41:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:56,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:56,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210084210] [2021-06-05 04:41:56,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210084210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:56,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288119702] [2021-06-05 04:41:56,927 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 04:41:56,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:56,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:56,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:57,069 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 04:41:57,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288119702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:57,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:57,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:57,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210007215] [2021-06-05 04:41:57,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:57,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:57,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:57,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:57,070 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 04:41:57,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:57,270 INFO L93 Difference]: Finished difference Result 425 states and 1249 transitions. [2021-06-05 04:41:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:57,270 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 04:41:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:57,271 INFO L225 Difference]: With dead ends: 425 [2021-06-05 04:41:57,271 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 04:41:57,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:57,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 04:41:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 352. [2021-06-05 04:41:57,274 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 04:41:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1078 transitions. [2021-06-05 04:41:57,275 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1078 transitions. Word has length 20 [2021-06-05 04:41:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:57,275 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1078 transitions. [2021-06-05 04:41:57,275 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 04:41:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1078 transitions. [2021-06-05 04:41:57,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:57,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:57,275 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:57,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2135,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:57,486 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:57,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1945903139, now seen corresponding path program 219 times [2021-06-05 04:41:57,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:57,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418402387] [2021-06-05 04:41:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:57,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:57,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418402387] [2021-06-05 04:41:57,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418402387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:57,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402565872] [2021-06-05 04:41:57,541 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 04:41:57,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:41:57,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:57,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:57,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:57,685 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 04:41:57,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402565872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:57,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:57,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:57,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593213360] [2021-06-05 04:41:57,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:57,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:57,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:57,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:57,686 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 04:41:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:57,869 INFO L93 Difference]: Finished difference Result 425 states and 1255 transitions. [2021-06-05 04:41:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:41:57,870 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 04:41:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:57,870 INFO L225 Difference]: With dead ends: 425 [2021-06-05 04:41:57,870 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 04:41:57,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:41:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 04:41:57,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 350. [2021-06-05 04:41:57,873 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 04:41:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1073 transitions. [2021-06-05 04:41:57,874 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1073 transitions. Word has length 20 [2021-06-05 04:41:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:57,874 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1073 transitions. [2021-06-05 04:41:57,874 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 04:41:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1073 transitions. [2021-06-05 04:41:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:57,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:57,875 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 04:41:58,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2141,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:58,075 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:58,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:58,075 INFO L82 PathProgramCache]: Analyzing trace with hash -905667341, now seen corresponding path program 220 times [2021-06-05 04:41:58,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:58,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338412049] [2021-06-05 04:41:58,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:58,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:58,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338412049] [2021-06-05 04:41:58,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338412049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:58,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637573338] [2021-06-05 04:41:58,125 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 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 04:41:58,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:41:58,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:58,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:58,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:58,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637573338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:58,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:58,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:58,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785471287] [2021-06-05 04:41:58,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:58,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:58,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:58,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:58,255 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 04:41:58,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:58,469 INFO L93 Difference]: Finished difference Result 400 states and 1205 transitions. [2021-06-05 04:41:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:58,469 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 04:41:58,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:58,470 INFO L225 Difference]: With dead ends: 400 [2021-06-05 04:41:58,470 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 04:41:58,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 04:41:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 335. [2021-06-05 04:41:58,473 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 04:41:58,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1030 transitions. [2021-06-05 04:41:58,473 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1030 transitions. Word has length 20 [2021-06-05 04:41:58,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:58,473 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1030 transitions. [2021-06-05 04:41:58,473 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 04:41:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1030 transitions. [2021-06-05 04:41:58,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:58,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:58,474 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:58,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2146,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:58,674 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:58,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1430277309, now seen corresponding path program 221 times [2021-06-05 04:41:58,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:58,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758980456] [2021-06-05 04:41:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:58,716 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 04:41:58,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:58,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758980456] [2021-06-05 04:41:58,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758980456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:58,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606041716] [2021-06-05 04:41:58,716 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 04:41:58,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:41:58,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:58,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:58,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:58,848 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 04:41:58,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606041716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:58,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:58,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:41:58,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976858818] [2021-06-05 04:41:58,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:41:58,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:58,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:41:58,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:41:58,848 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 04:41:59,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:59,018 INFO L93 Difference]: Finished difference Result 458 states and 1340 transitions. [2021-06-05 04:41:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:59,018 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 04:41:59,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:59,018 INFO L225 Difference]: With dead ends: 458 [2021-06-05 04:41:59,018 INFO L226 Difference]: Without dead ends: 440 [2021-06-05 04:41:59,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-05 04:41:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2021-06-05 04:41:59,022 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 04:41:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1040 transitions. [2021-06-05 04:41:59,022 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1040 transitions. Word has length 20 [2021-06-05 04:41:59,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:59,022 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1040 transitions. [2021-06-05 04:41:59,022 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 04:41:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1040 transitions. [2021-06-05 04:41:59,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:59,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:59,023 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:59,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2149 [2021-06-05 04:41:59,223 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash -852333885, now seen corresponding path program 222 times [2021-06-05 04:41:59,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:59,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580739394] [2021-06-05 04:41:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:59,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:59,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580739394] [2021-06-05 04:41:59,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580739394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:59,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035334801] [2021-06-05 04:41:59,268 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 04:41:59,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:41:59,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:41:59,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:59,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:41:59,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035334801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:59,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:59,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:59,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464918625] [2021-06-05 04:41:59,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:59,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:59,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:59,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:59,424 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 04:41:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:41:59,576 INFO L93 Difference]: Finished difference Result 454 states and 1332 transitions. [2021-06-05 04:41:59,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:41:59,576 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 04:41:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:41:59,577 INFO L225 Difference]: With dead ends: 454 [2021-06-05 04:41:59,577 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 04:41:59,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:41:59,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 04:41:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 341. [2021-06-05 04:41:59,580 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 04:41:59,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1045 transitions. [2021-06-05 04:41:59,580 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1045 transitions. Word has length 20 [2021-06-05 04:41:59,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:41:59,580 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1045 transitions. [2021-06-05 04:41:59,580 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 04:41:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1045 transitions. [2021-06-05 04:41:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:41:59,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:41:59,581 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:41:59,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2154,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:41:59,781 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:41:59,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:41:59,782 INFO L82 PathProgramCache]: Analyzing trace with hash -100933447, now seen corresponding path program 223 times [2021-06-05 04:41:59,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:41:59,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190868494] [2021-06-05 04:41:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:41:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:59,828 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 04:41:59,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:41:59,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190868494] [2021-06-05 04:41:59,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190868494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:59,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637284658] [2021-06-05 04:41:59,828 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 04:41:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:41:59,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:41:59,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:41:59,982 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 04:41:59,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637284658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:41:59,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:41:59,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:41:59,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147924035] [2021-06-05 04:41:59,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:41:59,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:41:59,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:41:59,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:41:59,982 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 04:42:00,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:00,254 INFO L93 Difference]: Finished difference Result 479 states and 1384 transitions. [2021-06-05 04:42:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:42:00,255 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 04:42:00,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:00,255 INFO L225 Difference]: With dead ends: 479 [2021-06-05 04:42:00,255 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 04:42:00,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:42:00,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 04:42:00,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 351. [2021-06-05 04:42:00,259 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 04:42:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1072 transitions. [2021-06-05 04:42:00,259 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1072 transitions. Word has length 20 [2021-06-05 04:42:00,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:00,259 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1072 transitions. [2021-06-05 04:42:00,259 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 04:42:00,259 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1072 transitions. [2021-06-05 04:42:00,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:00,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:00,260 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 04:42:00,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2159 [2021-06-05 04:42:00,460 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:00,460 INFO L82 PathProgramCache]: Analyzing trace with hash -2016357373, now seen corresponding path program 224 times [2021-06-05 04:42:00,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:00,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609883760] [2021-06-05 04:42:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:00,507 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 04:42:00,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:00,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609883760] [2021-06-05 04:42:00,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609883760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:00,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727906328] [2021-06-05 04:42:00,508 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 04:42:00,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:00,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:00,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:00,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:00,666 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 04:42:00,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727906328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:00,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:00,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:00,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020249846] [2021-06-05 04:42:00,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:00,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:00,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:00,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:00,667 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 04:42:00,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:00,813 INFO L93 Difference]: Finished difference Result 450 states and 1330 transitions. [2021-06-05 04:42:00,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:00,814 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 04:42:00,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:00,814 INFO L225 Difference]: With dead ends: 450 [2021-06-05 04:42:00,814 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 04:42:00,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 04:42:00,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 337. [2021-06-05 04:42:00,817 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 04:42:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-06-05 04:42:00,818 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-06-05 04:42:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:00,818 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-06-05 04:42:00,818 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 04:42:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-06-05 04:42:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:00,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:00,818 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:01,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2164,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:01,019 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:01,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:01,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1488800739, now seen corresponding path program 225 times [2021-06-05 04:42:01,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:01,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104495359] [2021-06-05 04:42:01,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:01,061 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 04:42:01,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:01,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104495359] [2021-06-05 04:42:01,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104495359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:01,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751648014] [2021-06-05 04:42:01,061 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 04:42:01,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:42:01,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:01,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:01,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:01,200 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 04:42:01,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751648014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:01,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:01,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:01,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645183370] [2021-06-05 04:42:01,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:01,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:01,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:01,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:01,201 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 04:42:01,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:01,351 INFO L93 Difference]: Finished difference Result 391 states and 1173 transitions. [2021-06-05 04:42:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:01,351 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 04:42:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:01,352 INFO L225 Difference]: With dead ends: 391 [2021-06-05 04:42:01,352 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 04:42:01,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:01,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 04:42:01,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 341. [2021-06-05 04:42:01,355 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 04:42:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1045 transitions. [2021-06-05 04:42:01,355 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1045 transitions. Word has length 20 [2021-06-05 04:42:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:01,356 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1045 transitions. [2021-06-05 04:42:01,356 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 04:42:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1045 transitions. [2021-06-05 04:42:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:01,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:01,356 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:01,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2168,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:01,557 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:01,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:01,557 INFO L82 PathProgramCache]: Analyzing trace with hash -737400301, now seen corresponding path program 226 times [2021-06-05 04:42:01,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:01,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168953649] [2021-06-05 04:42:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:01,600 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 04:42:01,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:01,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168953649] [2021-06-05 04:42:01,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168953649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:01,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876106022] [2021-06-05 04:42:01,600 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 04:42:01,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:01,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:01,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:01,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:01,734 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 04:42:01,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876106022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:01,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:01,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:01,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397111662] [2021-06-05 04:42:01,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:01,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:01,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:01,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:01,735 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 04:42:01,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:01,894 INFO L93 Difference]: Finished difference Result 416 states and 1225 transitions. [2021-06-05 04:42:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:42:01,894 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 04:42:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:01,895 INFO L225 Difference]: With dead ends: 416 [2021-06-05 04:42:01,895 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 04:42:01,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:42:01,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 04:42:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 351. [2021-06-05 04:42:01,898 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 04:42:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1072 transitions. [2021-06-05 04:42:01,899 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1072 transitions. Word has length 20 [2021-06-05 04:42:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:01,899 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1072 transitions. [2021-06-05 04:42:01,899 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 04:42:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1072 transitions. [2021-06-05 04:42:01,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:01,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:01,899 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 04:42:02,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2176,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:02,100 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:02,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:02,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1642143069, now seen corresponding path program 227 times [2021-06-05 04:42:02,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:02,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695446066] [2021-06-05 04:42:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:02,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:02,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:02,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695446066] [2021-06-05 04:42:02,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695446066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:02,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713366100] [2021-06-05 04:42:02,147 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 04:42:02,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:42:02,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:02,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:02,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713366100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:02,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:02,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:02,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027074129] [2021-06-05 04:42:02,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:02,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:02,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:02,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:02,290 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 04:42:02,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:02,418 INFO L93 Difference]: Finished difference Result 387 states and 1171 transitions. [2021-06-05 04:42:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:02,419 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 04:42:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:02,419 INFO L225 Difference]: With dead ends: 387 [2021-06-05 04:42:02,419 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 04:42:02,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 04:42:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 339. [2021-06-05 04:42:02,422 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 04:42:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1040 transitions. [2021-06-05 04:42:02,423 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1040 transitions. Word has length 20 [2021-06-05 04:42:02,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:02,423 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1040 transitions. [2021-06-05 04:42:02,423 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 04:42:02,423 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1040 transitions. [2021-06-05 04:42:02,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:02,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:02,423 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:02,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2180 [2021-06-05 04:42:02,624 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:02,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:02,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1445138365, now seen corresponding path program 228 times [2021-06-05 04:42:02,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:02,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843327789] [2021-06-05 04:42:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:02,667 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 04:42:02,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:02,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843327789] [2021-06-05 04:42:02,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843327789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:02,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234735324] [2021-06-05 04:42:02,668 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 04:42:02,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:42:02,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:02,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:02,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:02,795 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 04:42:02,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234735324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:02,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:02,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:02,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309290288] [2021-06-05 04:42:02,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:02,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:02,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:02,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:02,796 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 04:42:02,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:02,989 INFO L93 Difference]: Finished difference Result 420 states and 1235 transitions. [2021-06-05 04:42:02,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:02,990 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 04:42:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:02,990 INFO L225 Difference]: With dead ends: 420 [2021-06-05 04:42:02,990 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:42:02,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:02,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:42:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 353. [2021-06-05 04:42:02,993 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 04:42:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1079 transitions. [2021-06-05 04:42:02,994 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1079 transitions. Word has length 20 [2021-06-05 04:42:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:02,994 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1079 transitions. [2021-06-05 04:42:02,994 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 04:42:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1079 transitions. [2021-06-05 04:42:02,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:02,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:02,995 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:03,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2188 [2021-06-05 04:42:03,205 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash -470285561, now seen corresponding path program 229 times [2021-06-05 04:42:03,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:03,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567401269] [2021-06-05 04:42:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:03,250 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 04:42:03,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:03,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567401269] [2021-06-05 04:42:03,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567401269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:03,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506494076] [2021-06-05 04:42:03,251 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 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 04:42:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:03,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:03,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:03,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506494076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:03,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:03,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:03,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178834784] [2021-06-05 04:42:03,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:03,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:03,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:03,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:03,380 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 04:42:03,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:03,556 INFO L93 Difference]: Finished difference Result 420 states and 1241 transitions. [2021-06-05 04:42:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:42:03,556 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 04:42:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:03,557 INFO L225 Difference]: With dead ends: 420 [2021-06-05 04:42:03,557 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 04:42:03,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 04:42:03,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 351. [2021-06-05 04:42:03,560 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 04:42:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1074 transitions. [2021-06-05 04:42:03,560 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1074 transitions. Word has length 20 [2021-06-05 04:42:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:03,561 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 1074 transitions. [2021-06-05 04:42:03,561 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 04:42:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1074 transitions. [2021-06-05 04:42:03,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:03,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:03,561 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:03,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:03,762 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:03,762 INFO L82 PathProgramCache]: Analyzing trace with hash 569950237, now seen corresponding path program 230 times [2021-06-05 04:42:03,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:03,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480727300] [2021-06-05 04:42:03,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:03,807 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 04:42:03,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:03,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480727300] [2021-06-05 04:42:03,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480727300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:03,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165315522] [2021-06-05 04:42:03,807 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 04:42:03,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:03,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:03,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:03,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:03,921 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 04:42:03,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165315522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:03,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:03,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:42:03,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343753482] [2021-06-05 04:42:03,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:42:03,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:03,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:42:03,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:42:03,922 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 04:42:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:04,094 INFO L93 Difference]: Finished difference Result 395 states and 1191 transitions. [2021-06-05 04:42:04,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:04,095 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 04:42:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:04,095 INFO L225 Difference]: With dead ends: 395 [2021-06-05 04:42:04,095 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 04:42:04,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 04:42:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 337. [2021-06-05 04:42:04,098 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 04:42:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-06-05 04:42:04,099 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-06-05 04:42:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:04,099 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-06-05 04:42:04,099 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 04:42:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-06-05 04:42:04,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:04,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:04,099 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 04:42:04,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2198,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:04,300 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:04,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:04,300 INFO L82 PathProgramCache]: Analyzing trace with hash 915807584, now seen corresponding path program 231 times [2021-06-05 04:42:04,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:04,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122607004] [2021-06-05 04:42:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:04,335 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 04:42:04,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:04,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122607004] [2021-06-05 04:42:04,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122607004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:04,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341930173] [2021-06-05 04:42:04,336 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 04:42:04,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:42:04,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:04,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:04,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:04,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:04,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:04,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:04,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:04,454 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:42:04,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:42:04,454 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:42:04,491 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 04:42:04,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341930173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:04,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:04,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 04:42:04,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119160557] [2021-06-05 04:42:04,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:04,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:04,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:04,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:04,492 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 04:42:04,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:04,659 INFO L93 Difference]: Finished difference Result 436 states and 1297 transitions. [2021-06-05 04:42:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:04,659 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 04:42:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:04,660 INFO L225 Difference]: With dead ends: 436 [2021-06-05 04:42:04,660 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 04:42:04,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:04,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 04:42:04,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 332. [2021-06-05 04:42:04,662 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 04:42:04,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1015 transitions. [2021-06-05 04:42:04,663 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1015 transitions. Word has length 20 [2021-06-05 04:42:04,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:04,663 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1015 transitions. [2021-06-05 04:42:04,663 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 04:42:04,663 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1015 transitions. [2021-06-05 04:42:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:04,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:04,664 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 04:42:04,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2200 [2021-06-05 04:42:04,864 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:04,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:04,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1508226211, now seen corresponding path program 232 times [2021-06-05 04:42:04,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:04,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039876006] [2021-06-05 04:42:04,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:04,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:04,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039876006] [2021-06-05 04:42:04,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039876006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:04,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426855803] [2021-06-05 04:42:04,915 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 04:42:04,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:04,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:04,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:04,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:05,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:42:05,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:05,047 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 12 treesize of output 8 [2021-06-05 04:42:05,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:05,054 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 04:42:05,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:42:05,054 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:28, output treesize:6 [2021-06-05 04:42:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:05,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426855803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:05,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:05,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:05,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586598549] [2021-06-05 04:42:05,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:05,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:05,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:05,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:05,064 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 04:42:05,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:05,164 INFO L93 Difference]: Finished difference Result 419 states and 1237 transitions. [2021-06-05 04:42:05,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:05,164 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 04:42:05,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:05,165 INFO L225 Difference]: With dead ends: 419 [2021-06-05 04:42:05,165 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 04:42:05,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:42:05,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 04:42:05,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 342. [2021-06-05 04:42:05,168 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 04:42:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1041 transitions. [2021-06-05 04:42:05,168 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1041 transitions. Word has length 20 [2021-06-05 04:42:05,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:05,168 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1041 transitions. [2021-06-05 04:42:05,168 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 04:42:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1041 transitions. [2021-06-05 04:42:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:05,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:05,169 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 04:42:05,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2205 [2021-06-05 04:42:05,369 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:05,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:05,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1628097555, now seen corresponding path program 233 times [2021-06-05 04:42:05,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:05,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106903885] [2021-06-05 04:42:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:05,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:05,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106903885] [2021-06-05 04:42:05,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106903885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:05,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570353468] [2021-06-05 04:42:05,417 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 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 04:42:05,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:05,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:05,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:05,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:05,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:05,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:05,538 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 04:42:05,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:42:05,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 04:42:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:05,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570353468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:05,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:05,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:42:05,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115563094] [2021-06-05 04:42:05,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:42:05,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:05,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:42:05,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:42:05,559 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 04:42:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:05,690 INFO L93 Difference]: Finished difference Result 471 states and 1358 transitions. [2021-06-05 04:42:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:05,690 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 04:42:05,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:05,691 INFO L225 Difference]: With dead ends: 471 [2021-06-05 04:42:05,691 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 04:42:05,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:42:05,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 04:42:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 345. [2021-06-05 04:42:05,694 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 04:42:05,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 1052 transitions. [2021-06-05 04:42:05,694 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 1052 transitions. Word has length 20 [2021-06-05 04:42:05,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:05,694 INFO L482 AbstractCegarLoop]: Abstraction has 345 states and 1052 transitions. [2021-06-05 04:42:05,695 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 04:42:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 1052 transitions. [2021-06-05 04:42:05,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:05,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:05,695 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 04:42:05,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2211 [2021-06-05 04:42:05,896 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1172962019, now seen corresponding path program 234 times [2021-06-05 04:42:05,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:05,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711988089] [2021-06-05 04:42:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:05,943 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 04:42:05,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:05,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711988089] [2021-06-05 04:42:05,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711988089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:05,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612336403] [2021-06-05 04:42:05,943 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 04:42:06,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:42:06,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:06,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:06,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:06,055 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 12 treesize of output 8 [2021-06-05 04:42:06,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:06,061 INFO L628 ElimStorePlain]: treesize reduction 3, result has 66.7 percent of original size [2021-06-05 04:42:06,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:42:06,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2021-06-05 04:42:06,080 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 04:42:06,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612336403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:06,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:06,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:42:06,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827271509] [2021-06-05 04:42:06,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:42:06,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:06,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:42:06,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:42:06,081 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 04:42:06,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:06,206 INFO L93 Difference]: Finished difference Result 428 states and 1255 transitions. [2021-06-05 04:42:06,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:06,206 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 04:42:06,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:06,207 INFO L225 Difference]: With dead ends: 428 [2021-06-05 04:42:06,207 INFO L226 Difference]: Without dead ends: 422 [2021-06-05 04:42:06,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:42:06,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-06-05 04:42:06,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 337. [2021-06-05 04:42:06,210 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 04:42:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1028 transitions. [2021-06-05 04:42:06,211 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1028 transitions. Word has length 20 [2021-06-05 04:42:06,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:06,211 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1028 transitions. [2021-06-05 04:42:06,211 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 04:42:06,211 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1028 transitions. [2021-06-05 04:42:06,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:06,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:06,211 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:06,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2220,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:06,413 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:06,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:06,413 INFO L82 PathProgramCache]: Analyzing trace with hash -534005967, now seen corresponding path program 235 times [2021-06-05 04:42:06,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:06,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709432607] [2021-06-05 04:42:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:06,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:06,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709432607] [2021-06-05 04:42:06,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709432607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:06,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460267067] [2021-06-05 04:42:06,464 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 04:42:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:06,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:06,607 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 04:42:06,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460267067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:06,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:06,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:06,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142426187] [2021-06-05 04:42:06,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:06,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:06,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:06,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:06,608 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 04:42:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:06,742 INFO L93 Difference]: Finished difference Result 397 states and 1171 transitions. [2021-06-05 04:42:06,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:06,742 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 04:42:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:06,743 INFO L225 Difference]: With dead ends: 397 [2021-06-05 04:42:06,743 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 04:42:06,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:42:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 04:42:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 343. [2021-06-05 04:42:06,746 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 04:42:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1050 transitions. [2021-06-05 04:42:06,746 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1050 transitions. Word has length 20 [2021-06-05 04:42:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:06,746 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1050 transitions. [2021-06-05 04:42:06,746 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 04:42:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1050 transitions. [2021-06-05 04:42:06,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:06,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:06,747 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:06,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2229,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:06,947 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:06,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:06,948 INFO L82 PathProgramCache]: Analyzing trace with hash -2027913689, now seen corresponding path program 236 times [2021-06-05 04:42:06,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:06,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075062987] [2021-06-05 04:42:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:07,001 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 04:42:07,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:07,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075062987] [2021-06-05 04:42:07,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075062987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:07,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794137202] [2021-06-05 04:42:07,001 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 04:42:07,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:07,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:07,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:07,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:07,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794137202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:07,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:07,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:07,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761081767] [2021-06-05 04:42:07,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:07,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:07,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:07,147 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 04:42:07,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:07,348 INFO L93 Difference]: Finished difference Result 403 states and 1178 transitions. [2021-06-05 04:42:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:07,349 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 04:42:07,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:07,349 INFO L225 Difference]: With dead ends: 403 [2021-06-05 04:42:07,349 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 04:42:07,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:07,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 04:42:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 340. [2021-06-05 04:42:07,352 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 04:42:07,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1039 transitions. [2021-06-05 04:42:07,353 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1039 transitions. Word has length 20 [2021-06-05 04:42:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:07,353 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1039 transitions. [2021-06-05 04:42:07,353 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 04:42:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1039 transitions. [2021-06-05 04:42:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:07,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:07,353 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:07,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2237 [2021-06-05 04:42:07,554 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:07,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:07,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1490058111, now seen corresponding path program 237 times [2021-06-05 04:42:07,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:07,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380685047] [2021-06-05 04:42:07,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:07,608 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 04:42:07,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:07,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380685047] [2021-06-05 04:42:07,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380685047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:07,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310437339] [2021-06-05 04:42:07,609 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 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 04:42:07,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:42:07,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:07,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:07,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:07,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310437339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:07,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:07,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:42:07,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820044557] [2021-06-05 04:42:07,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:42:07,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:07,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:42:07,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:42:07,745 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 04:42:07,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:07,916 INFO L93 Difference]: Finished difference Result 361 states and 1083 transitions. [2021-06-05 04:42:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:07,917 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 04:42:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:07,917 INFO L225 Difference]: With dead ends: 361 [2021-06-05 04:42:07,917 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 04:42:07,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:42:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 04:42:07,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 332. [2021-06-05 04:42:07,920 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 04:42:07,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1015 transitions. [2021-06-05 04:42:07,920 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1015 transitions. Word has length 20 [2021-06-05 04:42:07,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:07,921 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1015 transitions. [2021-06-05 04:42:07,921 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 04:42:07,921 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1015 transitions. [2021-06-05 04:42:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:07,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:07,921 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:08,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2245 [2021-06-05 04:42:08,121 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:08,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:08,122 INFO L82 PathProgramCache]: Analyzing trace with hash -144970506, now seen corresponding path program 238 times [2021-06-05 04:42:08,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:08,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746003584] [2021-06-05 04:42:08,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:08,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:08,163 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 04:42:08,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:08,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746003584] [2021-06-05 04:42:08,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746003584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:08,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286065774] [2021-06-05 04:42:08,163 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 04:42:08,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:08,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:08,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:08,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:08,271 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 04:42:08,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:08,273 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:42:08,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:08,275 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 6 treesize of output 4 [2021-06-05 04:42:08,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:08,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:08,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:08,301 INFO L628 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2021-06-05 04:42:08,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:08,302 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-06-05 04:42:08,355 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 04:42:08,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286065774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:08,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:08,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 04:42:08,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365215337] [2021-06-05 04:42:08,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:08,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:08,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:08,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:08,355 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 04:42:08,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:08,586 INFO L93 Difference]: Finished difference Result 522 states and 1535 transitions. [2021-06-05 04:42:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:08,586 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 04:42:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:08,587 INFO L225 Difference]: With dead ends: 522 [2021-06-05 04:42:08,587 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 04:42:08,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:08,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 04:42:08,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 337. [2021-06-05 04:42:08,590 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 04:42:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1040 transitions. [2021-06-05 04:42:08,591 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1040 transitions. Word has length 20 [2021-06-05 04:42:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:08,591 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1040 transitions. [2021-06-05 04:42:08,591 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 04:42:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1040 transitions. [2021-06-05 04:42:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:08,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:08,591 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 04:42:08,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2254 [2021-06-05 04:42:08,791 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:08,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2049541401, now seen corresponding path program 239 times [2021-06-05 04:42:08,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:08,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515205672] [2021-06-05 04:42:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:08,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:08,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515205672] [2021-06-05 04:42:08,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515205672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:08,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817291982] [2021-06-05 04:42:08,843 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 04:42:08,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:08,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:08,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:08,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:08,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:08,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:08,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:08,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:09,007 INFO L628 ElimStorePlain]: treesize reduction 14, result has 77.0 percent of original size [2021-06-05 04:42:09,008 INFO L518 ElimStorePlain]: Eliminatee v_prenex_67 vanished before elimination [2021-06-05 04:42:09,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:09,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:09,037 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 04:42:09,037 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:42:09,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:09,038 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:80, output treesize:20 [2021-06-05 04:42:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:09,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817291982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:09,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:09,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:09,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439503782] [2021-06-05 04:42:09,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:09,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:09,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:09,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:09,080 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 04:42:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:09,255 INFO L93 Difference]: Finished difference Result 577 states and 1670 transitions. [2021-06-05 04:42:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:09,256 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 04:42:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:09,256 INFO L225 Difference]: With dead ends: 577 [2021-06-05 04:42:09,256 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 04:42:09,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:09,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 04:42:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 349. [2021-06-05 04:42:09,260 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 04:42:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1081 transitions. [2021-06-05 04:42:09,260 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1081 transitions. Word has length 20 [2021-06-05 04:42:09,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:09,261 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 1081 transitions. [2021-06-05 04:42:09,261 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 04:42:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1081 transitions. [2021-06-05 04:42:09,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:09,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:09,261 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 04:42:09,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2265 [2021-06-05 04:42:09,477 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:09,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1086782365, now seen corresponding path program 240 times [2021-06-05 04:42:09,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:09,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450351531] [2021-06-05 04:42:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:09,523 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 04:42:09,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:09,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450351531] [2021-06-05 04:42:09,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450351531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:09,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140385892] [2021-06-05 04:42:09,523 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 04:42:09,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:42:09,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:09,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:09,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:09,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:09,670 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.8 percent of original size [2021-06-05 04:42:09,672 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 6 treesize of output 4 [2021-06-05 04:42:09,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:09,675 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 13 treesize of output 9 [2021-06-05 04:42:09,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:09,694 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:42:09,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:09,695 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 04:42:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:09,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140385892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:09,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:09,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:09,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805150372] [2021-06-05 04:42:09,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:09,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:09,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:09,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:09,735 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 04:42:09,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:09,868 INFO L93 Difference]: Finished difference Result 629 states and 1791 transitions. [2021-06-05 04:42:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:09,869 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 04:42:09,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:09,869 INFO L225 Difference]: With dead ends: 629 [2021-06-05 04:42:09,869 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 04:42:09,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 04:42:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 355. [2021-06-05 04:42:09,873 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 04:42:09,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1106 transitions. [2021-06-05 04:42:09,874 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1106 transitions. Word has length 20 [2021-06-05 04:42:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:09,874 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 1106 transitions. [2021-06-05 04:42:09,874 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 04:42:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1106 transitions. [2021-06-05 04:42:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:09,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:09,874 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:10,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2274,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:10,075 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:10,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:10,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1714277209, now seen corresponding path program 241 times [2021-06-05 04:42:10,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:10,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650841276] [2021-06-05 04:42:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:10,120 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 04:42:10,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:10,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650841276] [2021-06-05 04:42:10,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650841276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:10,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123078941] [2021-06-05 04:42:10,120 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 04:42:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:10,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:10,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:10,239 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 04:42:10,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:10,242 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 5 treesize of output 3 [2021-06-05 04:42:10,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:10,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:10,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:10,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:10,264 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 13 treesize of output 9 [2021-06-05 04:42:10,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:10,283 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:42:10,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:10,284 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:42:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:10,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123078941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:10,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:10,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:10,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782202586] [2021-06-05 04:42:10,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:10,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:10,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:10,323 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 04:42:10,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:10,490 INFO L93 Difference]: Finished difference Result 586 states and 1682 transitions. [2021-06-05 04:42:10,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:10,490 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 04:42:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:10,491 INFO L225 Difference]: With dead ends: 586 [2021-06-05 04:42:10,491 INFO L226 Difference]: Without dead ends: 580 [2021-06-05 04:42:10,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-05 04:42:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 353. [2021-06-05 04:42:10,494 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 04:42:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1095 transitions. [2021-06-05 04:42:10,495 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1095 transitions. Word has length 20 [2021-06-05 04:42:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:10,495 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1095 transitions. [2021-06-05 04:42:10,495 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 04:42:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1095 transitions. [2021-06-05 04:42:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:10,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:10,496 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:10,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2286,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:10,709 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:10,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:10,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1834913410, now seen corresponding path program 242 times [2021-06-05 04:42:10,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:10,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448389282] [2021-06-05 04:42:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:10,744 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 04:42:10,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:10,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448389282] [2021-06-05 04:42:10,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448389282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:10,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41390696] [2021-06-05 04:42:10,745 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 04:42:10,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:10,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:10,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:10,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:10,847 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 13 treesize of output 9 [2021-06-05 04:42:10,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:10,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:42:10,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:10,872 INFO L628 ElimStorePlain]: treesize reduction 13, result has 67.5 percent of original size [2021-06-05 04:42:10,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:10,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:10,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:10,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:10,883 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 04:42:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:10,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41390696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:10,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:10,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 04:42:10,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144950808] [2021-06-05 04:42:10,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:10,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:10,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:10,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:10,931 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 04:42:11,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:11,138 INFO L93 Difference]: Finished difference Result 469 states and 1402 transitions. [2021-06-05 04:42:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:11,138 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 04:42:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:11,139 INFO L225 Difference]: With dead ends: 469 [2021-06-05 04:42:11,139 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 04:42:11,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 04:42:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 347. [2021-06-05 04:42:11,142 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 04:42:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1066 transitions. [2021-06-05 04:42:11,143 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1066 transitions. Word has length 20 [2021-06-05 04:42:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:11,143 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 1066 transitions. [2021-06-05 04:42:11,143 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 04:42:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1066 transitions. [2021-06-05 04:42:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:11,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:11,143 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:11,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2299 [2021-06-05 04:42:11,359 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:11,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:11,359 INFO L82 PathProgramCache]: Analyzing trace with hash -426848797, now seen corresponding path program 243 times [2021-06-05 04:42:11,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:11,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412587009] [2021-06-05 04:42:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:11,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:11,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412587009] [2021-06-05 04:42:11,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412587009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:11,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470275524] [2021-06-05 04:42:11,409 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 04:42:11,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:42:11,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:11,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:11,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:11,526 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 12 treesize of output 8 [2021-06-05 04:42:11,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:11,560 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.8 percent of original size [2021-06-05 04:42:11,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:11,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:11,567 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 04:42:11,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:11,587 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:42:11,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:11,587 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 04:42:11,634 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 04:42:11,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470275524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:11,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:11,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:42:11,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704073801] [2021-06-05 04:42:11,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:42:11,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:11,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:42:11,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:42:11,635 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 04:42:11,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:11,788 INFO L93 Difference]: Finished difference Result 530 states and 1548 transitions. [2021-06-05 04:42:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:11,788 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 04:42:11,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:11,788 INFO L225 Difference]: With dead ends: 530 [2021-06-05 04:42:11,789 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 04:42:11,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 04:42:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 337. [2021-06-05 04:42:11,792 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 04:42:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1035 transitions. [2021-06-05 04:42:11,792 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1035 transitions. Word has length 20 [2021-06-05 04:42:11,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:11,792 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1035 transitions. [2021-06-05 04:42:11,792 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 04:42:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1035 transitions. [2021-06-05 04:42:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:11,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:11,793 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:11,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2311,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:11,993 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:11,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1206202595, now seen corresponding path program 244 times [2021-06-05 04:42:11,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:11,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79574133] [2021-06-05 04:42:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:12,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:12,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79574133] [2021-06-05 04:42:12,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79574133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:12,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266147514] [2021-06-05 04:42:12,044 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 04:42:12,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:12,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:12,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:12,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:12,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:12,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:12,198 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-06-05 04:42:12,200 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 12 treesize of output 8 [2021-06-05 04:42:12,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:12,202 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 13 treesize of output 9 [2021-06-05 04:42:12,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:12,218 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:42:12,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:12,218 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:58, output treesize:20 [2021-06-05 04:42:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:12,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266147514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:12,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:12,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:12,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792115091] [2021-06-05 04:42:12,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:12,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:12,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:12,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:12,260 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 04:42:12,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:12,384 INFO L93 Difference]: Finished difference Result 497 states and 1466 transitions. [2021-06-05 04:42:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:12,384 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 04:42:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:12,385 INFO L225 Difference]: With dead ends: 497 [2021-06-05 04:42:12,385 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 04:42:12,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:42:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 04:42:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 340. [2021-06-05 04:42:12,388 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 04:42:12,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1050 transitions. [2021-06-05 04:42:12,389 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1050 transitions. Word has length 20 [2021-06-05 04:42:12,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:12,389 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1050 transitions. [2021-06-05 04:42:12,389 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 04:42:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1050 transitions. [2021-06-05 04:42:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:12,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:12,389 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 04:42:12,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2322 [2021-06-05 04:42:12,590 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:12,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:12,590 INFO L82 PathProgramCache]: Analyzing trace with hash -750934361, now seen corresponding path program 245 times [2021-06-05 04:42:12,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:12,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117011061] [2021-06-05 04:42:12,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:12,639 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 04:42:12,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:12,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117011061] [2021-06-05 04:42:12,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117011061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:12,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029404572] [2021-06-05 04:42:12,640 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 04:42:12,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:42:12,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:12,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:12,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:12,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:12,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:12,758 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 12 treesize of output 8 [2021-06-05 04:42:12,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:12,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:12,777 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 6 treesize of output 4 [2021-06-05 04:42:12,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:12,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:12,780 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:12,799 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:42:12,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:12,799 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:42:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:12,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029404572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:12,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:12,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:12,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132502782] [2021-06-05 04:42:12,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:12,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:12,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:12,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:12,840 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 04:42:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:12,932 INFO L93 Difference]: Finished difference Result 464 states and 1389 transitions. [2021-06-05 04:42:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:12,932 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 04:42:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:12,932 INFO L225 Difference]: With dead ends: 464 [2021-06-05 04:42:12,932 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 04:42:12,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:42:12,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 04:42:12,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 331. [2021-06-05 04:42:12,936 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 04:42:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1011 transitions. [2021-06-05 04:42:12,936 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1011 transitions. Word has length 20 [2021-06-05 04:42:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:12,936 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1011 transitions. [2021-06-05 04:42:12,936 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 04:42:12,936 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1011 transitions. [2021-06-05 04:42:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:12,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:12,937 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:13,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2333 [2021-06-05 04:42:13,137 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash 538015729, now seen corresponding path program 246 times [2021-06-05 04:42:13,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:13,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122482826] [2021-06-05 04:42:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:13,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122482826] [2021-06-05 04:42:13,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122482826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489038573] [2021-06-05 04:42:13,189 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 04:42:13,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:42:13,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:13,305 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 5 treesize of output 3 [2021-06-05 04:42:13,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:13,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:13,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:13,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:13,326 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 6 treesize of output 4 [2021-06-05 04:42:13,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:13,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:13,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:13,348 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:42:13,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:13,349 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:42:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:13,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489038573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:13,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:13,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:13,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511103721] [2021-06-05 04:42:13,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:13,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:13,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:13,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:13,421 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 04:42:13,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:13,593 INFO L93 Difference]: Finished difference Result 574 states and 1673 transitions. [2021-06-05 04:42:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:13,593 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 04:42:13,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:13,594 INFO L225 Difference]: With dead ends: 574 [2021-06-05 04:42:13,594 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 04:42:13,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 04:42:13,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 339. [2021-06-05 04:42:13,598 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 04:42:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1047 transitions. [2021-06-05 04:42:13,598 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1047 transitions. Word has length 20 [2021-06-05 04:42:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:13,598 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1047 transitions. [2021-06-05 04:42:13,599 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 04:42:13,599 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1047 transitions. [2021-06-05 04:42:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:13,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:13,599 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 04:42:13,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2345 [2021-06-05 04:42:13,799 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:13,800 INFO L82 PathProgramCache]: Analyzing trace with hash -955891993, now seen corresponding path program 247 times [2021-06-05 04:42:13,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:13,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722798171] [2021-06-05 04:42:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:13,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:13,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722798171] [2021-06-05 04:42:13,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722798171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:13,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108462584] [2021-06-05 04:42:13,850 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 04:42:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:13,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:13,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:13,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:13,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:14,008 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.9 percent of original size [2021-06-05 04:42:14,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:14,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:14,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:14,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:14,030 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:42:14,030 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:42:14,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:14,030 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:20 [2021-06-05 04:42:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:14,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108462584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:14,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:14,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:14,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082154973] [2021-06-05 04:42:14,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:14,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:14,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:14,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:14,099 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 04:42:14,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:14,255 INFO L93 Difference]: Finished difference Result 560 states and 1622 transitions. [2021-06-05 04:42:14,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:14,256 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 04:42:14,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:14,256 INFO L225 Difference]: With dead ends: 560 [2021-06-05 04:42:14,256 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 04:42:14,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 04:42:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 342. [2021-06-05 04:42:14,260 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 04:42:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1049 transitions. [2021-06-05 04:42:14,260 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1049 transitions. Word has length 20 [2021-06-05 04:42:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:14,260 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1049 transitions. [2021-06-05 04:42:14,260 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 04:42:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1049 transitions. [2021-06-05 04:42:14,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:14,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:14,261 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 04:42:14,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2358 [2021-06-05 04:42:14,465 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:14,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1289416167, now seen corresponding path program 248 times [2021-06-05 04:42:14,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:14,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190170895] [2021-06-05 04:42:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:14,520 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 04:42:14,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:14,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190170895] [2021-06-05 04:42:14,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190170895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:14,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129604030] [2021-06-05 04:42:14,520 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 04:42:14,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:14,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:14,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:14,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:14,646 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 04:42:14,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:14,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:42:14,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:14,682 INFO L628 ElimStorePlain]: treesize reduction 2, result has 95.7 percent of original size [2021-06-05 04:42:14,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:14,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:14,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:14,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:14,706 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:42:14,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:14,706 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:65, output treesize:20 [2021-06-05 04:42:14,780 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 04:42:14,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129604030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:14,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:14,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:14,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008009636] [2021-06-05 04:42:14,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:14,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:14,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:14,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:14,780 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 04:42:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:14,975 INFO L93 Difference]: Finished difference Result 570 states and 1656 transitions. [2021-06-05 04:42:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:14,975 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 04:42:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:14,976 INFO L225 Difference]: With dead ends: 570 [2021-06-05 04:42:14,976 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 04:42:14,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 04:42:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 335. [2021-06-05 04:42:14,983 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 04:42:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1031 transitions. [2021-06-05 04:42:14,984 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1031 transitions. Word has length 20 [2021-06-05 04:42:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:14,984 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1031 transitions. [2021-06-05 04:42:14,984 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 04:42:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1031 transitions. [2021-06-05 04:42:14,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:14,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:14,984 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 04:42:15,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2371,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:15,185 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:15,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1713208729, now seen corresponding path program 249 times [2021-06-05 04:42:15,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:15,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009183490] [2021-06-05 04:42:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:15,238 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 04:42:15,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:15,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009183490] [2021-06-05 04:42:15,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009183490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:15,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960396123] [2021-06-05 04:42:15,238 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 04:42:15,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:42:15,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:15,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:15,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:15,362 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 04:42:15,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:15,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:15,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:15,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:15,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:15,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:15,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:15,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:15,406 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:42:15,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:15,407 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:42:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:15,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960396123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:15,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:15,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:15,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479549558] [2021-06-05 04:42:15,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:15,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:15,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:15,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:15,476 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 04:42:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:15,639 INFO L93 Difference]: Finished difference Result 539 states and 1589 transitions. [2021-06-05 04:42:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:15,640 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 04:42:15,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:15,640 INFO L225 Difference]: With dead ends: 539 [2021-06-05 04:42:15,640 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 04:42:15,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 04:42:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 332. [2021-06-05 04:42:15,644 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 04:42:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1016 transitions. [2021-06-05 04:42:15,644 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1016 transitions. Word has length 20 [2021-06-05 04:42:15,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:15,644 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1016 transitions. [2021-06-05 04:42:15,644 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 04:42:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1016 transitions. [2021-06-05 04:42:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:15,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:15,645 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:15,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:15,845 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:15,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:15,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1310152695, now seen corresponding path program 250 times [2021-06-05 04:42:15,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:15,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777635285] [2021-06-05 04:42:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:15,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:15,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777635285] [2021-06-05 04:42:15,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777635285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:15,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418882155] [2021-06-05 04:42:15,896 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 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 04:42:15,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:15,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:15,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:16,013 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 5 treesize of output 3 [2021-06-05 04:42:16,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:16,016 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 12 treesize of output 8 [2021-06-05 04:42:16,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:16,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:16,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:16,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:16,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:16,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:16,057 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:42:16,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:16,058 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:42:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:16,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418882155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:16,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:16,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:16,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760878376] [2021-06-05 04:42:16,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:16,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:16,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:16,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:16,127 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 04:42:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:16,314 INFO L93 Difference]: Finished difference Result 505 states and 1476 transitions. [2021-06-05 04:42:16,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:16,314 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 04:42:16,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:16,315 INFO L225 Difference]: With dead ends: 505 [2021-06-05 04:42:16,315 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 04:42:16,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 04:42:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 342. [2021-06-05 04:42:16,318 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 04:42:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1043 transitions. [2021-06-05 04:42:16,319 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1043 transitions. Word has length 20 [2021-06-05 04:42:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:16,319 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1043 transitions. [2021-06-05 04:42:16,319 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 04:42:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1043 transitions. [2021-06-05 04:42:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:16,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:16,319 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:16,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2397 [2021-06-05 04:42:16,520 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:16,520 INFO L82 PathProgramCache]: Analyzing trace with hash -605271231, now seen corresponding path program 251 times [2021-06-05 04:42:16,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:16,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327132038] [2021-06-05 04:42:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:16,571 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 04:42:16,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:16,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327132038] [2021-06-05 04:42:16,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327132038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:16,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580146622] [2021-06-05 04:42:16,571 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 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 04:42:16,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:42:16,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:16,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:16,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:16,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:16,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:16,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:16,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:16,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:16,721 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 04:42:16,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:16,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:16,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:16,743 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:42:16,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:16,744 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:42:16,811 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 04:42:16,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580146622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:16,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:16,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:16,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874747706] [2021-06-05 04:42:16,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:16,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:16,812 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 04:42:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:16,959 INFO L93 Difference]: Finished difference Result 482 states and 1437 transitions. [2021-06-05 04:42:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:16,959 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 04:42:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:16,960 INFO L225 Difference]: With dead ends: 482 [2021-06-05 04:42:16,960 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 04:42:16,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 04:42:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 329. [2021-06-05 04:42:16,963 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 04:42:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1003 transitions. [2021-06-05 04:42:16,964 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1003 transitions. Word has length 20 [2021-06-05 04:42:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:16,964 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 1003 transitions. [2021-06-05 04:42:16,964 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 04:42:16,964 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1003 transitions. [2021-06-05 04:42:16,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:16,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:16,964 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 04:42:17,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2410,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:17,165 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:17,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:17,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1704872605, now seen corresponding path program 252 times [2021-06-05 04:42:17,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:17,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383435079] [2021-06-05 04:42:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:17,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:17,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383435079] [2021-06-05 04:42:17,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383435079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:17,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229539318] [2021-06-05 04:42:17,223 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 04:42:17,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:42:17,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:17,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:17,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:17,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229539318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:17,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:17,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:17,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679030698] [2021-06-05 04:42:17,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:17,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:17,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:17,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:17,423 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 04:42:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:17,692 INFO L93 Difference]: Finished difference Result 403 states and 1191 transitions. [2021-06-05 04:42:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:17,692 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 04:42:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:17,693 INFO L225 Difference]: With dead ends: 403 [2021-06-05 04:42:17,693 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 04:42:17,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 04:42:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 336. [2021-06-05 04:42:17,696 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 04:42:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1030 transitions. [2021-06-05 04:42:17,697 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1030 transitions. Word has length 20 [2021-06-05 04:42:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:17,697 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1030 transitions. [2021-06-05 04:42:17,697 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 04:42:17,697 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1030 transitions. [2021-06-05 04:42:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:17,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:17,697 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 04:42:17,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-06-05 04:42:17,901 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:17,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1096186969, now seen corresponding path program 253 times [2021-06-05 04:42:17,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:17,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863783267] [2021-06-05 04:42:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:17,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:17,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863783267] [2021-06-05 04:42:17,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863783267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:17,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868581073] [2021-06-05 04:42:17,957 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 04:42:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:18,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:18,160 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 04:42:18,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868581073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:18,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:18,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:18,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683275278] [2021-06-05 04:42:18,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:18,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:18,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:18,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:18,161 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 04:42:18,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:18,453 INFO L93 Difference]: Finished difference Result 409 states and 1198 transitions. [2021-06-05 04:42:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:18,454 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 04:42:18,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:18,455 INFO L225 Difference]: With dead ends: 409 [2021-06-05 04:42:18,455 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 04:42:18,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 04:42:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 333. [2021-06-05 04:42:18,458 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 04:42:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1019 transitions. [2021-06-05 04:42:18,458 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1019 transitions. Word has length 20 [2021-06-05 04:42:18,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:18,458 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1019 transitions. [2021-06-05 04:42:18,458 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 04:42:18,458 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1019 transitions. [2021-06-05 04:42:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:18,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:18,459 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 04:42:18,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2437,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:18,666 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:18,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:18,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1634042547, now seen corresponding path program 254 times [2021-06-05 04:42:18,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:18,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929734081] [2021-06-05 04:42:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:18,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:18,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929734081] [2021-06-05 04:42:18,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929734081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:18,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824079186] [2021-06-05 04:42:18,715 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 04:42:18,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:18,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:18,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:18,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:18,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824079186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:18,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:18,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:18,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925719815] [2021-06-05 04:42:18,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:18,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:18,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:18,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:18,912 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 04:42:19,169 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-06-05 04:42:19,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:19,239 INFO L93 Difference]: Finished difference Result 373 states and 1116 transitions. [2021-06-05 04:42:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:19,239 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 04:42:19,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:19,239 INFO L225 Difference]: With dead ends: 373 [2021-06-05 04:42:19,239 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 04:42:19,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 340.7ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:19,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 04:42:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 330. [2021-06-05 04:42:19,242 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 04:42:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1008 transitions. [2021-06-05 04:42:19,243 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1008 transitions. Word has length 20 [2021-06-05 04:42:19,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:19,243 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 1008 transitions. [2021-06-05 04:42:19,243 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 04:42:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1008 transitions. [2021-06-05 04:42:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:19,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:19,243 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:19,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:19,445 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:19,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:19,446 INFO L82 PathProgramCache]: Analyzing trace with hash 113704493, now seen corresponding path program 255 times [2021-06-05 04:42:19,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:19,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681638626] [2021-06-05 04:42:19,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:19,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:19,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681638626] [2021-06-05 04:42:19,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681638626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:19,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687314048] [2021-06-05 04:42:19,503 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 04:42:19,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:42:19,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:19,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:19,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:19,691 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 04:42:19,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687314048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:19,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:19,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:19,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524949244] [2021-06-05 04:42:19,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:19,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:19,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:19,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:19,692 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 04:42:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:19,888 INFO L93 Difference]: Finished difference Result 487 states and 1401 transitions. [2021-06-05 04:42:19,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:19,888 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 04:42:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:19,889 INFO L225 Difference]: With dead ends: 487 [2021-06-05 04:42:19,889 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 04:42:19,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 04:42:19,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 338. [2021-06-05 04:42:19,892 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 04:42:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1044 transitions. [2021-06-05 04:42:19,893 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1044 transitions. Word has length 20 [2021-06-05 04:42:19,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:19,893 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1044 transitions. [2021-06-05 04:42:19,893 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 04:42:19,893 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1044 transitions. [2021-06-05 04:42:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:19,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:19,893 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:20,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2461,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:20,105 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:20,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:20,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1380203229, now seen corresponding path program 256 times [2021-06-05 04:42:20,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:20,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812407481] [2021-06-05 04:42:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:20,160 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 04:42:20,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:20,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812407481] [2021-06-05 04:42:20,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812407481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:20,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156231467] [2021-06-05 04:42:20,160 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 04:42:20,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:20,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:20,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:20,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:20,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156231467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:20,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:20,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:20,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240721940] [2021-06-05 04:42:20,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:20,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:20,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:20,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:20,337 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 04:42:20,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:20,512 INFO L93 Difference]: Finished difference Result 493 states and 1402 transitions. [2021-06-05 04:42:20,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:20,512 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 04:42:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:20,513 INFO L225 Difference]: With dead ends: 493 [2021-06-05 04:42:20,513 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 04:42:20,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 04:42:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 341. [2021-06-05 04:42:20,516 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 04:42:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1046 transitions. [2021-06-05 04:42:20,517 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1046 transitions. Word has length 20 [2021-06-05 04:42:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:20,517 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1046 transitions. [2021-06-05 04:42:20,517 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 04:42:20,517 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1046 transitions. [2021-06-05 04:42:20,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:20,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:20,517 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 04:42:20,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2473,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:20,718 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:20,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:20,718 INFO L82 PathProgramCache]: Analyzing trace with hash 865104931, now seen corresponding path program 257 times [2021-06-05 04:42:20,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:20,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161306984] [2021-06-05 04:42:20,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:20,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:20,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161306984] [2021-06-05 04:42:20,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161306984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:20,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243348990] [2021-06-05 04:42:20,776 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 04:42:20,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:42:20,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:20,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:20,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:20,967 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 04:42:20,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243348990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:20,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:20,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:20,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824019557] [2021-06-05 04:42:20,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:20,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:20,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:20,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:20,968 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 04:42:21,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:21,164 INFO L93 Difference]: Finished difference Result 455 states and 1322 transitions. [2021-06-05 04:42:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:21,164 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 04:42:21,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:21,165 INFO L225 Difference]: With dead ends: 455 [2021-06-05 04:42:21,165 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 04:42:21,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 04:42:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 334. [2021-06-05 04:42:21,168 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 04:42:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1028 transitions. [2021-06-05 04:42:21,169 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1028 transitions. Word has length 20 [2021-06-05 04:42:21,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:21,169 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1028 transitions. [2021-06-05 04:42:21,169 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 04:42:21,169 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1028 transitions. [2021-06-05 04:42:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:21,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:21,169 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 04:42:21,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2482,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:21,370 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:21,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2137519965, now seen corresponding path program 258 times [2021-06-05 04:42:21,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:21,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643795577] [2021-06-05 04:42:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:21,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:21,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643795577] [2021-06-05 04:42:21,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643795577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:21,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538578679] [2021-06-05 04:42:21,428 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 04:42:21,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:42:21,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:21,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:21,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:21,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:21,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538578679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:21,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:21,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:21,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255221271] [2021-06-05 04:42:21,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:21,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:21,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:21,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:21,616 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 04:42:21,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:21,786 INFO L93 Difference]: Finished difference Result 418 states and 1240 transitions. [2021-06-05 04:42:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:21,787 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 04:42:21,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:21,787 INFO L225 Difference]: With dead ends: 418 [2021-06-05 04:42:21,787 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 04:42:21,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:21,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 04:42:21,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 331. [2021-06-05 04:42:21,790 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 04:42:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 1013 transitions. [2021-06-05 04:42:21,791 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 1013 transitions. Word has length 20 [2021-06-05 04:42:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:21,791 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 1013 transitions. [2021-06-05 04:42:21,791 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 04:42:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 1013 transitions. [2021-06-05 04:42:21,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:21,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:21,791 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:21,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-06-05 04:42:21,992 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:21,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:21,992 INFO L82 PathProgramCache]: Analyzing trace with hash 885841459, now seen corresponding path program 259 times [2021-06-05 04:42:21,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:21,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153627626] [2021-06-05 04:42:21,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:22,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:22,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153627626] [2021-06-05 04:42:22,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153627626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:22,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203108363] [2021-06-05 04:42:22,046 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 04:42:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:22,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:22,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:22,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203108363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:22,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:22,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:22,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093472361] [2021-06-05 04:42:22,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:22,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:22,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:22,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:22,224 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 04:42:22,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:22,419 INFO L93 Difference]: Finished difference Result 455 states and 1314 transitions. [2021-06-05 04:42:22,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:22,419 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 04:42:22,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:22,420 INFO L225 Difference]: With dead ends: 455 [2021-06-05 04:42:22,420 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 04:42:22,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:22,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 04:42:22,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 341. [2021-06-05 04:42:22,424 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 04:42:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1040 transitions. [2021-06-05 04:42:22,424 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1040 transitions. Word has length 20 [2021-06-05 04:42:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:22,424 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1040 transitions. [2021-06-05 04:42:22,424 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 04:42:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1040 transitions. [2021-06-05 04:42:22,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:22,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:22,425 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 04:42:22,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2508,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:22,625 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:22,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:22,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1029582467, now seen corresponding path program 260 times [2021-06-05 04:42:22,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:22,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901365721] [2021-06-05 04:42:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:22,688 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 04:42:22,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:22,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901365721] [2021-06-05 04:42:22,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901365721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:22,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993724435] [2021-06-05 04:42:22,688 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 04:42:22,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:22,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:22,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:22,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:22,870 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 04:42:22,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993724435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:22,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:22,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:22,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397456857] [2021-06-05 04:42:22,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:22,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:22,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:22,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:22,871 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 04:42:23,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:23,088 INFO L93 Difference]: Finished difference Result 432 states and 1275 transitions. [2021-06-05 04:42:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:23,089 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 04:42:23,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:23,089 INFO L225 Difference]: With dead ends: 432 [2021-06-05 04:42:23,089 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 04:42:23,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:23,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 04:42:23,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 330. [2021-06-05 04:42:23,092 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 04:42:23,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 1008 transitions. [2021-06-05 04:42:23,093 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 1008 transitions. Word has length 20 [2021-06-05 04:42:23,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:23,093 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 1008 transitions. [2021-06-05 04:42:23,093 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 04:42:23,093 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 1008 transitions. [2021-06-05 04:42:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:23,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:23,093 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 04:42:23,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2515,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:23,294 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1133016157, now seen corresponding path program 261 times [2021-06-05 04:42:23,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:23,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955286306] [2021-06-05 04:42:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:23,342 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 04:42:23,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:23,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955286306] [2021-06-05 04:42:23,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955286306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:23,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209355210] [2021-06-05 04:42:23,343 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 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 04:42:23,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:42:23,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:23,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:23,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:23,532 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 04:42:23,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209355210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:23,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:23,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:23,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393087388] [2021-06-05 04:42:23,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:23,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:23,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:23,533 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 04:42:23,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:23,823 INFO L93 Difference]: Finished difference Result 364 states and 1092 transitions. [2021-06-05 04:42:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:23,824 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 04:42:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:23,824 INFO L225 Difference]: With dead ends: 364 [2021-06-05 04:42:23,824 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 04:42:23,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 04:42:23,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 332. [2021-06-05 04:42:23,827 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 04:42:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1013 transitions. [2021-06-05 04:42:23,828 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1013 transitions. Word has length 20 [2021-06-05 04:42:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:23,828 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1013 transitions. [2021-06-05 04:42:23,828 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 04:42:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1013 transitions. [2021-06-05 04:42:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:23,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:23,828 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:24,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2522 [2021-06-05 04:42:24,029 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:24,029 INFO L82 PathProgramCache]: Analyzing trace with hash -381615719, now seen corresponding path program 262 times [2021-06-05 04:42:24,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:24,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56686626] [2021-06-05 04:42:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:24,078 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 04:42:24,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:24,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56686626] [2021-06-05 04:42:24,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56686626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:24,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359386154] [2021-06-05 04:42:24,078 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 04:42:24,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:24,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:24,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:24,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:24,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359386154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:24,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:24,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:24,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189241321] [2021-06-05 04:42:24,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:24,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:24,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:24,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:24,279 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 04:42:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:24,586 INFO L93 Difference]: Finished difference Result 389 states and 1144 transitions. [2021-06-05 04:42:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:42:24,586 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 04:42:24,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:24,587 INFO L225 Difference]: With dead ends: 389 [2021-06-05 04:42:24,587 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 04:42:24,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:42:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 04:42:24,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 342. [2021-06-05 04:42:24,590 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 04:42:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1040 transitions. [2021-06-05 04:42:24,590 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1040 transitions. Word has length 20 [2021-06-05 04:42:24,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:24,591 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1040 transitions. [2021-06-05 04:42:24,591 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 04:42:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1040 transitions. [2021-06-05 04:42:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:24,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:24,591 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 04:42:24,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2529,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:24,792 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:24,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:24,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1997927651, now seen corresponding path program 263 times [2021-06-05 04:42:24,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:24,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250970022] [2021-06-05 04:42:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:24,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:24,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250970022] [2021-06-05 04:42:24,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250970022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:24,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168829575] [2021-06-05 04:42:24,843 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 04:42:24,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:42:24,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:24,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:24,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:25,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168829575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:25,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:25,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:25,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787232528] [2021-06-05 04:42:25,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:25,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:25,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:25,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:25,030 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 04:42:25,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:25,268 INFO L93 Difference]: Finished difference Result 360 states and 1090 transitions. [2021-06-05 04:42:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:25,269 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 04:42:25,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:25,269 INFO L225 Difference]: With dead ends: 360 [2021-06-05 04:42:25,269 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 04:42:25,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:25,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 04:42:25,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 327. [2021-06-05 04:42:25,272 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 04:42:25,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 995 transitions. [2021-06-05 04:42:25,272 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 995 transitions. Word has length 20 [2021-06-05 04:42:25,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:25,273 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 995 transitions. [2021-06-05 04:42:25,273 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 04:42:25,273 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 995 transitions. [2021-06-05 04:42:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:25,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:25,273 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:25,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2536 [2021-06-05 04:42:25,473 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:25,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:25,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1330647072, now seen corresponding path program 264 times [2021-06-05 04:42:25,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:25,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347226571] [2021-06-05 04:42:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:25,518 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 04:42:25,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:25,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347226571] [2021-06-05 04:42:25,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347226571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:25,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115101570] [2021-06-05 04:42:25,518 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 04:42:25,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:42:25,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:25,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:25,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:25,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:25,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:25,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:25,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:42:25,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:25,688 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.0 percent of original size [2021-06-05 04:42:25,688 INFO L518 ElimStorePlain]: Eliminatee v_prenex_82 vanished before elimination [2021-06-05 04:42:25,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:25,691 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:25,710 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-06-05 04:42:25,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:25,711 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:81, output treesize:20 [2021-06-05 04:42:25,771 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 04:42:25,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115101570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:25,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:25,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 04:42:25,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923148320] [2021-06-05 04:42:25,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:25,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:25,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:25,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:25,771 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 04:42:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:26,046 INFO L93 Difference]: Finished difference Result 462 states and 1326 transitions. [2021-06-05 04:42:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:26,046 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 04:42:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:26,047 INFO L225 Difference]: With dead ends: 462 [2021-06-05 04:42:26,047 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 04:42:26,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:42:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 04:42:26,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 322. [2021-06-05 04:42:26,050 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 04:42:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 970 transitions. [2021-06-05 04:42:26,050 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 970 transitions. Word has length 20 [2021-06-05 04:42:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:26,050 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 970 transitions. [2021-06-05 04:42:26,050 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 04:42:26,050 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 970 transitions. [2021-06-05 04:42:26,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:26,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:26,051 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:26,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2546,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:26,251 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:26,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:26,251 INFO L82 PathProgramCache]: Analyzing trace with hash -769808317, now seen corresponding path program 265 times [2021-06-05 04:42:26,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:26,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356597441] [2021-06-05 04:42:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:26,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:26,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356597441] [2021-06-05 04:42:26,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356597441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:26,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755684277] [2021-06-05 04:42:26,305 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 04:42:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:26,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:26,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:26,429 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 6 treesize of output 4 [2021-06-05 04:42:26,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:26,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:26,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:26,454 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 04:42:26,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:26,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:26,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:26,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:26,465 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:42:26,500 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 04:42:26,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755684277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:26,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:26,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:26,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002574934] [2021-06-05 04:42:26,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:26,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:26,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:26,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:26,501 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 04:42:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:26,675 INFO L93 Difference]: Finished difference Result 484 states and 1407 transitions. [2021-06-05 04:42:26,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:26,676 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 04:42:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:26,676 INFO L225 Difference]: With dead ends: 484 [2021-06-05 04:42:26,676 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 04:42:26,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 04:42:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 336. [2021-06-05 04:42:26,680 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 04:42:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1019 transitions. [2021-06-05 04:42:26,680 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1019 transitions. Word has length 20 [2021-06-05 04:42:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:26,680 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1019 transitions. [2021-06-05 04:42:26,680 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 04:42:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1019 transitions. [2021-06-05 04:42:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:26,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:26,681 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 04:42:26,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2555 [2021-06-05 04:42:26,894 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:26,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:26,894 INFO L82 PathProgramCache]: Analyzing trace with hash 388835213, now seen corresponding path program 266 times [2021-06-05 04:42:26,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:26,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957359968] [2021-06-05 04:42:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:26,943 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 04:42:26,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:26,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957359968] [2021-06-05 04:42:26,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957359968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:26,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436740178] [2021-06-05 04:42:26,944 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 04:42:27,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:27,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:27,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:27,052 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 12 treesize of output 8 [2021-06-05 04:42:27,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:27,055 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 04:42:27,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:27,090 INFO L628 ElimStorePlain]: treesize reduction 3, result has 94.0 percent of original size [2021-06-05 04:42:27,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:27,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:27,110 INFO L628 ElimStorePlain]: treesize reduction 21, result has 48.8 percent of original size [2021-06-05 04:42:27,111 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-06-05 04:42:27,111 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:42:27,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:27,111 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 04:42:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:27,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436740178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:27,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:27,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:27,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718758943] [2021-06-05 04:42:27,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:27,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:27,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:27,151 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 04:42:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:27,401 INFO L93 Difference]: Finished difference Result 536 states and 1528 transitions. [2021-06-05 04:42:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:42:27,401 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 04:42:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:27,402 INFO L225 Difference]: With dead ends: 536 [2021-06-05 04:42:27,402 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 04:42:27,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 04:42:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 342. [2021-06-05 04:42:27,405 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 04:42:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1044 transitions. [2021-06-05 04:42:27,406 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1044 transitions. Word has length 20 [2021-06-05 04:42:27,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:27,406 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1044 transitions. [2021-06-05 04:42:27,406 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 04:42:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1044 transitions. [2021-06-05 04:42:27,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:27,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:27,406 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:27,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2564 [2021-06-05 04:42:27,607 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:27,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:27,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1105072509, now seen corresponding path program 267 times [2021-06-05 04:42:27,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:27,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88043851] [2021-06-05 04:42:27,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:27,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:27,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88043851] [2021-06-05 04:42:27,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88043851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:27,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81436051] [2021-06-05 04:42:27,653 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 04:42:27,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:42:27,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:27,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:27,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:27,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:27,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:27,794 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:42:27,794 INFO L518 ElimStorePlain]: Eliminatee v_prenex_88 vanished before elimination [2021-06-05 04:42:27,794 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-06-05 04:42:27,796 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 12 treesize of output 8 [2021-06-05 04:42:27,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:27,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:27,799 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:27,816 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:42:27,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:27,816 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 04:42:27,855 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 04:42:27,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81436051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:27,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:27,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:27,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26732375] [2021-06-05 04:42:27,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:27,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:27,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:27,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:27,856 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 04:42:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:27,998 INFO L93 Difference]: Finished difference Result 493 states and 1419 transitions. [2021-06-05 04:42:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:27,999 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 04:42:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:27,999 INFO L225 Difference]: With dead ends: 493 [2021-06-05 04:42:27,999 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 04:42:27,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 04:42:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 340. [2021-06-05 04:42:28,002 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 04:42:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1033 transitions. [2021-06-05 04:42:28,003 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1033 transitions. Word has length 20 [2021-06-05 04:42:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:28,003 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1033 transitions. [2021-06-05 04:42:28,003 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 04:42:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1033 transitions. [2021-06-05 04:42:28,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:28,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:28,004 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 04:42:28,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2576,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:28,204 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash -359295832, now seen corresponding path program 268 times [2021-06-05 04:42:28,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:28,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794154263] [2021-06-05 04:42:28,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:28,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:28,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794154263] [2021-06-05 04:42:28,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794154263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:28,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888552829] [2021-06-05 04:42:28,245 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 04:42:28,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:28,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:28,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:28,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:28,358 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 12 treesize of output 8 [2021-06-05 04:42:28,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:28,361 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 13 treesize of output 9 [2021-06-05 04:42:28,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:28,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:42:28,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:28,394 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.3 percent of original size [2021-06-05 04:42:28,395 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 6 treesize of output 4 [2021-06-05 04:42:28,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:28,417 INFO L628 ElimStorePlain]: treesize reduction 10, result has 66.7 percent of original size [2021-06-05 04:42:28,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:28,417 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:68, output treesize:20 [2021-06-05 04:42:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:28,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888552829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:28,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:28,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 04:42:28,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510704600] [2021-06-05 04:42:28,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:28,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:28,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:28,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:28,472 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 04:42:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:28,787 INFO L93 Difference]: Finished difference Result 438 states and 1286 transitions. [2021-06-05 04:42:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:42:28,787 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 04:42:28,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:28,788 INFO L225 Difference]: With dead ends: 438 [2021-06-05 04:42:28,788 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 04:42:28,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:42:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 04:42:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 331. [2021-06-05 04:42:28,791 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 04:42:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 998 transitions. [2021-06-05 04:42:28,791 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 998 transitions. Word has length 20 [2021-06-05 04:42:28,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:28,792 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 998 transitions. [2021-06-05 04:42:28,792 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 04:42:28,792 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 998 transitions. [2021-06-05 04:42:28,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:28,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:28,792 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 04:42:28,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2587 [2021-06-05 04:42:28,992 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:28,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1048768781, now seen corresponding path program 269 times [2021-06-05 04:42:28,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:28,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882669993] [2021-06-05 04:42:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:29,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:29,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882669993] [2021-06-05 04:42:29,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882669993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:29,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650841193] [2021-06-05 04:42:29,041 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 04:42:29,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:42:29,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:29,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:29,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:29,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:29,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:29,182 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-06-05 04:42:29,182 INFO L518 ElimStorePlain]: Eliminatee v_prenex_92 vanished before elimination [2021-06-05 04:42:29,186 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 04:42:29,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:29,188 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 13 treesize of output 9 [2021-06-05 04:42:29,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:29,206 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:42:29,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:29,206 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 04:42:29,254 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 04:42:29,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650841193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:29,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:29,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:42:29,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631664099] [2021-06-05 04:42:29,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:42:29,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:29,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:42:29,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:42:29,255 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 04:42:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:29,441 INFO L93 Difference]: Finished difference Result 586 states and 1687 transitions. [2021-06-05 04:42:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:42:29,442 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 04:42:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:29,442 INFO L225 Difference]: With dead ends: 586 [2021-06-05 04:42:29,442 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 04:42:29,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:42:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 04:42:29,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 337. [2021-06-05 04:42:29,446 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 04:42:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1022 transitions. [2021-06-05 04:42:29,446 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1022 transitions. Word has length 20 [2021-06-05 04:42:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:29,446 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1022 transitions. [2021-06-05 04:42:29,446 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 04:42:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1022 transitions. [2021-06-05 04:42:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:29,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:29,447 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:29,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2599,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:29,647 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:29,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1613147123, now seen corresponding path program 270 times [2021-06-05 04:42:29,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:29,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683661045] [2021-06-05 04:42:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:29,697 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 04:42:29,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:29,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683661045] [2021-06-05 04:42:29,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683661045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:29,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734152116] [2021-06-05 04:42:29,697 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 04:42:29,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:42:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:29,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:29,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:29,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:29,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:29,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:29,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:29,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:29,857 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 04:42:29,859 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 12 treesize of output 8 [2021-06-05 04:42:29,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:29,861 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 04:42:29,862 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:29,879 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:42:29,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:29,879 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 04:42:29,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:29,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734152116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:29,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:29,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:29,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830477332] [2021-06-05 04:42:29,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:29,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:29,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:29,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:29,954 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 04:42:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:30,087 INFO L93 Difference]: Finished difference Result 553 states and 1605 transitions. [2021-06-05 04:42:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:30,087 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 04:42:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:30,088 INFO L225 Difference]: With dead ends: 553 [2021-06-05 04:42:30,088 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 04:42:30,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:42:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 04:42:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 340. [2021-06-05 04:42:30,091 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 04:42:30,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1037 transitions. [2021-06-05 04:42:30,092 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1037 transitions. Word has length 20 [2021-06-05 04:42:30,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:30,092 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1037 transitions. [2021-06-05 04:42:30,092 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 04:42:30,092 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1037 transitions. [2021-06-05 04:42:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:30,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:30,092 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:30,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2609,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:30,293 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:30,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:30,293 INFO L82 PathProgramCache]: Analyzing trace with hash 724683217, now seen corresponding path program 271 times [2021-06-05 04:42:30,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:30,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838738446] [2021-06-05 04:42:30,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:30,342 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 04:42:30,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:30,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838738446] [2021-06-05 04:42:30,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838738446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:30,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443572227] [2021-06-05 04:42:30,343 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 04:42:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:30,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:30,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:30,450 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 6 treesize of output 4 [2021-06-05 04:42:30,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:30,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:30,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:30,474 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 04:42:30,476 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 04:42:30,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:30,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:30,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:30,485 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:42:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:30,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443572227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:30,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:30,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:42:30,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071591974] [2021-06-05 04:42:30,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:42:30,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:30,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:42:30,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:42:30,527 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 04:42:30,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:30,676 INFO L93 Difference]: Finished difference Result 520 states and 1528 transitions. [2021-06-05 04:42:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:30,677 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 04:42:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:30,677 INFO L225 Difference]: With dead ends: 520 [2021-06-05 04:42:30,678 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 04:42:30,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:42:30,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 04:42:30,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 331. [2021-06-05 04:42:30,681 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 04:42:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 998 transitions. [2021-06-05 04:42:30,681 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 998 transitions. Word has length 20 [2021-06-05 04:42:30,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:30,681 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 998 transitions. [2021-06-05 04:42:30,682 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 04:42:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 998 transitions. [2021-06-05 04:42:30,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:30,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:30,682 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:30,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2620,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:30,882 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:30,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:30,883 INFO L82 PathProgramCache]: Analyzing trace with hash 2013633307, now seen corresponding path program 272 times [2021-06-05 04:42:30,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:30,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461203696] [2021-06-05 04:42:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:30,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:30,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461203696] [2021-06-05 04:42:30,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461203696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:30,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192749671] [2021-06-05 04:42:30,935 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 04:42:31,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:31,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:31,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:31,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:31,047 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 6 treesize of output 4 [2021-06-05 04:42:31,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:31,078 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:42:31,078 INFO L518 ElimStorePlain]: Eliminatee v_prenex_97 vanished before elimination [2021-06-05 04:42:31,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:31,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:31,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:31,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:31,099 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:42:31,100 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:42:31,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:31,100 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 04:42:31,168 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 04:42:31,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192749671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:31,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:31,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:31,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484523923] [2021-06-05 04:42:31,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:31,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:31,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:31,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:31,169 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 04:42:31,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:31,472 INFO L93 Difference]: Finished difference Result 651 states and 1812 transitions. [2021-06-05 04:42:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:42:31,472 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 04:42:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:31,473 INFO L225 Difference]: With dead ends: 651 [2021-06-05 04:42:31,473 INFO L226 Difference]: Without dead ends: 651 [2021-06-05 04:42:31,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:42:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-05 04:42:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 339. [2021-06-05 04:42:31,477 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 04:42:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 1034 transitions. [2021-06-05 04:42:31,478 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 1034 transitions. Word has length 20 [2021-06-05 04:42:31,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:31,478 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 1034 transitions. [2021-06-05 04:42:31,478 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 04:42:31,478 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 1034 transitions. [2021-06-05 04:42:31,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:31,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:31,478 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:31,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2629,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:31,679 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:31,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:31,679 INFO L82 PathProgramCache]: Analyzing trace with hash 519725585, now seen corresponding path program 273 times [2021-06-05 04:42:31,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:31,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402352442] [2021-06-05 04:42:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:31,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:31,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402352442] [2021-06-05 04:42:31,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402352442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:31,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958841640] [2021-06-05 04:42:31,729 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 04:42:31,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:42:31,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:31,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:31,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:31,839 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 6 treesize of output 4 [2021-06-05 04:42:31,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:31,882 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-06-05 04:42:31,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:31,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:31,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:31,903 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 13 treesize of output 9 [2021-06-05 04:42:31,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:31,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:42:31,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:31,923 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 04:42:31,923 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:42:31,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:31,924 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 04:42:31,990 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 04:42:31,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958841640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:31,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:31,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:31,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699326014] [2021-06-05 04:42:31,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:31,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:31,991 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 04:42:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:32,182 INFO L93 Difference]: Finished difference Result 585 states and 1658 transitions. [2021-06-05 04:42:32,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:32,182 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 04:42:32,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:32,183 INFO L225 Difference]: With dead ends: 585 [2021-06-05 04:42:32,183 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 04:42:32,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 04:42:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-06-05 04:42:32,186 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 04:42:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1009 transitions. [2021-06-05 04:42:32,187 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1009 transitions. Word has length 20 [2021-06-05 04:42:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:32,187 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1009 transitions. [2021-06-05 04:42:32,187 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 04:42:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1009 transitions. [2021-06-05 04:42:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:32,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:32,187 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:32,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2640 [2021-06-05 04:42:32,388 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:32,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:32,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1529933551, now seen corresponding path program 274 times [2021-06-05 04:42:32,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:32,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748262030] [2021-06-05 04:42:32,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:32,440 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 04:42:32,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:32,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748262030] [2021-06-05 04:42:32,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748262030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:32,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112912866] [2021-06-05 04:42:32,441 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 04:42:32,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:32,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:32,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:32,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:32,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:32,587 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-06-05 04:42:32,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:32,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:32,591 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 13 treesize of output 9 [2021-06-05 04:42:32,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:32,613 INFO L628 ElimStorePlain]: treesize reduction 7, result has 79.4 percent of original size [2021-06-05 04:42:32,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:32,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:32,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:32,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:32,623 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:20 [2021-06-05 04:42:32,696 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 04:42:32,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112912866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:32,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:32,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:32,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189491337] [2021-06-05 04:42:32,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:32,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:32,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:32,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:32,697 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 04:42:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:32,906 INFO L93 Difference]: Finished difference Result 610 states and 1747 transitions. [2021-06-05 04:42:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:32,906 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 04:42:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:32,907 INFO L225 Difference]: With dead ends: 610 [2021-06-05 04:42:32,907 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 04:42:32,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:32,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 04:42:32,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 336. [2021-06-05 04:42:32,910 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 04:42:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1024 transitions. [2021-06-05 04:42:32,911 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1024 transitions. Word has length 20 [2021-06-05 04:42:32,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:32,911 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 1024 transitions. [2021-06-05 04:42:32,911 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 04:42:32,911 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1024 transitions. [2021-06-05 04:42:32,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:32,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:32,912 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:33,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2650 [2021-06-05 04:42:33,112 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:33,112 INFO L82 PathProgramCache]: Analyzing trace with hash -237591151, now seen corresponding path program 275 times [2021-06-05 04:42:33,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:33,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921251019] [2021-06-05 04:42:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:33,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:33,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921251019] [2021-06-05 04:42:33,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921251019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:33,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431390862] [2021-06-05 04:42:33,165 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 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 04:42:33,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:33,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:33,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:33,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:33,272 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 04:42:33,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:33,275 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 04:42:33,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:33,307 INFO L628 ElimStorePlain]: treesize reduction 10, result has 81.1 percent of original size [2021-06-05 04:42:33,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:33,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:33,334 INFO L628 ElimStorePlain]: treesize reduction 11, result has 71.1 percent of original size [2021-06-05 04:42:33,335 INFO L518 ElimStorePlain]: Eliminatee v_prenex_105 vanished before elimination [2021-06-05 04:42:33,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:33,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:33,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:33,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:33,345 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 04:42:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:33,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431390862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:33,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:33,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:33,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348716371] [2021-06-05 04:42:33,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:33,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:33,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:33,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:33,421 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 04:42:33,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:33,593 INFO L93 Difference]: Finished difference Result 579 states and 1680 transitions. [2021-06-05 04:42:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:33,594 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 04:42:33,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:33,594 INFO L225 Difference]: With dead ends: 579 [2021-06-05 04:42:33,594 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 04:42:33,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 04:42:33,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-06-05 04:42:33,598 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 04:42:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1009 transitions. [2021-06-05 04:42:33,599 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1009 transitions. Word has length 20 [2021-06-05 04:42:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:33,599 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1009 transitions. [2021-06-05 04:42:33,599 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 04:42:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1009 transitions. [2021-06-05 04:42:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:33,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:33,599 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 04:42:33,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2663 [2021-06-05 04:42:33,799 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:33,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:33,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1509197023, now seen corresponding path program 276 times [2021-06-05 04:42:33,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:33,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634589633] [2021-06-05 04:42:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:33,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:33,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:33,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634589633] [2021-06-05 04:42:33,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634589633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:33,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551003285] [2021-06-05 04:42:33,849 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 04:42:33,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:42:33,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:33,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:33,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:33,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:33,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:33,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:33,980 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 6 treesize of output 4 [2021-06-05 04:42:33,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:34,009 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 04:42:34,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:34,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:34,013 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 13 treesize of output 9 [2021-06-05 04:42:34,014 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:34,030 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:42:34,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:34,031 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 04:42:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:34,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551003285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:34,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:34,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:34,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608724134] [2021-06-05 04:42:34,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:34,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:34,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:34,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:34,102 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 04:42:34,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:34,287 INFO L93 Difference]: Finished difference Result 533 states and 1527 transitions. [2021-06-05 04:42:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:34,287 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 04:42:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:34,288 INFO L225 Difference]: With dead ends: 533 [2021-06-05 04:42:34,288 INFO L226 Difference]: Without dead ends: 527 [2021-06-05 04:42:34,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-06-05 04:42:34,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 337. [2021-06-05 04:42:34,291 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 04:42:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1023 transitions. [2021-06-05 04:42:34,291 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1023 transitions. Word has length 20 [2021-06-05 04:42:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:34,292 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 1023 transitions. [2021-06-05 04:42:34,292 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 04:42:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1023 transitions. [2021-06-05 04:42:34,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:34,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:34,292 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:34,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2672 [2021-06-05 04:42:34,493 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:34,493 INFO L82 PathProgramCache]: Analyzing trace with hash 870346347, now seen corresponding path program 277 times [2021-06-05 04:42:34,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:34,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703860340] [2021-06-05 04:42:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:34,544 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 04:42:34,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:34,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703860340] [2021-06-05 04:42:34,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703860340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:34,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851715122] [2021-06-05 04:42:34,544 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 04:42:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:34,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:34,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:34,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:34,689 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-06-05 04:42:34,691 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 12 treesize of output 8 [2021-06-05 04:42:34,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:34,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:42:34,710 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 6 treesize of output 4 [2021-06-05 04:42:34,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:34,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:34,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:34,732 INFO L628 ElimStorePlain]: treesize reduction 7, result has 74.1 percent of original size [2021-06-05 04:42:34,732 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:42:34,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:42:34,732 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 04:42:34,800 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 04:42:34,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851715122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:34,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:34,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:34,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711373648] [2021-06-05 04:42:34,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:34,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:34,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:34,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:34,801 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 04:42:34,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:34,996 INFO L93 Difference]: Finished difference Result 539 states and 1548 transitions. [2021-06-05 04:42:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:42:34,997 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 04:42:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:34,997 INFO L225 Difference]: With dead ends: 539 [2021-06-05 04:42:34,997 INFO L226 Difference]: Without dead ends: 539 [2021-06-05 04:42:34,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:34,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-05 04:42:35,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 332. [2021-06-05 04:42:35,001 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 04:42:35,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 1005 transitions. [2021-06-05 04:42:35,001 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 1005 transitions. Word has length 20 [2021-06-05 04:42:35,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:35,001 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 1005 transitions. [2021-06-05 04:42:35,001 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 04:42:35,001 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 1005 transitions. [2021-06-05 04:42:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:35,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:35,002 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:35,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2683 [2021-06-05 04:42:35,202 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:35,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:35,202 INFO L82 PathProgramCache]: Analyzing trace with hash -12009309, now seen corresponding path program 278 times [2021-06-05 04:42:35,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:35,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206203083] [2021-06-05 04:42:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:35,258 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 04:42:35,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206203083] [2021-06-05 04:42:35,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206203083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699227691] [2021-06-05 04:42:35,258 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 04:42:35,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:35,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:35,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:35,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:35,383 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 04:42:35,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:35,385 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 04:42:35,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:35,398 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:42:35,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:42:35,398 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:42:35,431 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 04:42:35,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699227691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:35,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:35,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:42:35,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482962163] [2021-06-05 04:42:35,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:42:35,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:35,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:42:35,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:42:35,432 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 04:42:35,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:35,600 INFO L93 Difference]: Finished difference Result 469 states and 1387 transitions. [2021-06-05 04:42:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:35,600 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 04:42:35,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:35,600 INFO L225 Difference]: With dead ends: 469 [2021-06-05 04:42:35,601 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 04:42:35,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 04:42:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 335. [2021-06-05 04:42:35,604 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 04:42:35,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 1011 transitions. [2021-06-05 04:42:35,604 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 1011 transitions. Word has length 20 [2021-06-05 04:42:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:35,604 INFO L482 AbstractCegarLoop]: Abstraction has 335 states and 1011 transitions. [2021-06-05 04:42:35,604 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 04:42:35,604 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 1011 transitions. [2021-06-05 04:42:35,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:35,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:35,605 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:35,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2692,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:35,805 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1621042083, now seen corresponding path program 279 times [2021-06-05 04:42:35,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:35,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470088417] [2021-06-05 04:42:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:35,853 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 04:42:35,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:35,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470088417] [2021-06-05 04:42:35,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470088417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:35,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144791037] [2021-06-05 04:42:35,853 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 04:42:35,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:42:35,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:35,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:35,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:35,980 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 04:42:35,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:35,983 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 13 treesize of output 9 [2021-06-05 04:42:35,983 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:35,996 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:42:35,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:42:35,996 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:42:36,046 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 04:42:36,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144791037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:36,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:36,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:36,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881133588] [2021-06-05 04:42:36,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:36,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:36,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:36,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:36,046 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 04:42:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:36,207 INFO L93 Difference]: Finished difference Result 473 states and 1379 transitions. [2021-06-05 04:42:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:36,207 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 04:42:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:36,208 INFO L225 Difference]: With dead ends: 473 [2021-06-05 04:42:36,208 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 04:42:36,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 04:42:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 334. [2021-06-05 04:42:36,211 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 04:42:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 1006 transitions. [2021-06-05 04:42:36,212 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 1006 transitions. Word has length 20 [2021-06-05 04:42:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:36,212 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 1006 transitions. [2021-06-05 04:42:36,212 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 04:42:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 1006 transitions. [2021-06-05 04:42:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:36,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:36,212 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 04:42:36,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2698 [2021-06-05 04:42:36,413 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:36,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:36,413 INFO L82 PathProgramCache]: Analyzing trace with hash -336094873, now seen corresponding path program 280 times [2021-06-05 04:42:36,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:36,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796067941] [2021-06-05 04:42:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:36,459 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 04:42:36,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:36,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796067941] [2021-06-05 04:42:36,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796067941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:36,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495703156] [2021-06-05 04:42:36,460 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 04:42:36,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:36,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:36,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:36,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:36,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:42:36,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:36,592 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 13 treesize of output 9 [2021-06-05 04:42:36,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:42:36,607 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:42:36,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:42:36,608 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:42:36,654 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 04:42:36,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495703156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:36,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:36,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:36,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028941278] [2021-06-05 04:42:36,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:36,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:36,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:36,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:36,655 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 04:42:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:36,819 INFO L93 Difference]: Finished difference Result 430 states and 1282 transitions. [2021-06-05 04:42:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:36,819 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 04:42:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:36,820 INFO L225 Difference]: With dead ends: 430 [2021-06-05 04:42:36,820 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 04:42:36,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 04:42:36,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 317. [2021-06-05 04:42:36,823 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 04:42:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 945 transitions. [2021-06-05 04:42:36,823 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 945 transitions. Word has length 20 [2021-06-05 04:42:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:36,823 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 945 transitions. [2021-06-05 04:42:36,823 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 04:42:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 945 transitions. [2021-06-05 04:42:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:36,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:36,824 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:37,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2705 [2021-06-05 04:42:37,024 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:37,024 INFO L82 PathProgramCache]: Analyzing trace with hash 284238669, now seen corresponding path program 281 times [2021-06-05 04:42:37,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:37,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389076335] [2021-06-05 04:42:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:37,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:37,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389076335] [2021-06-05 04:42:37,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389076335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:37,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121465070] [2021-06-05 04:42:37,076 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 04:42:37,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:37,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:37,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:37,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:37,229 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 04:42:37,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121465070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:37,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:37,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:37,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483081717] [2021-06-05 04:42:37,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:37,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:37,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:37,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:37,230 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 04:42:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:37,390 INFO L93 Difference]: Finished difference Result 383 states and 1124 transitions. [2021-06-05 04:42:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:37,390 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 04:42:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:37,390 INFO L225 Difference]: With dead ends: 383 [2021-06-05 04:42:37,390 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 04:42:37,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:37,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 04:42:37,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 323. [2021-06-05 04:42:37,393 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 04:42:37,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-06-05 04:42:37,394 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-06-05 04:42:37,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:37,394 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-06-05 04:42:37,394 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 04:42:37,394 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-06-05 04:42:37,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:37,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:37,394 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:37,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2712,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:37,595 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:37,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1672898287, now seen corresponding path program 282 times [2021-06-05 04:42:37,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:37,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651524605] [2021-06-05 04:42:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:37,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:37,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651524605] [2021-06-05 04:42:37,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651524605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:37,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816451270] [2021-06-05 04:42:37,647 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 04:42:37,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:42:37,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:37,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:37,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:37,797 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 04:42:37,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816451270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:37,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:37,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:37,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026521411] [2021-06-05 04:42:37,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:37,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:37,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:37,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:37,797 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 04:42:37,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:37,965 INFO L93 Difference]: Finished difference Result 389 states and 1139 transitions. [2021-06-05 04:42:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:42:37,966 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 04:42:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:37,966 INFO L225 Difference]: With dead ends: 389 [2021-06-05 04:42:37,966 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 04:42:37,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 04:42:37,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 320. [2021-06-05 04:42:37,969 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 04:42:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 957 transitions. [2021-06-05 04:42:37,969 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 957 transitions. Word has length 20 [2021-06-05 04:42:37,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:37,970 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 957 transitions. [2021-06-05 04:42:37,970 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 04:42:37,970 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 957 transitions. [2021-06-05 04:42:37,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:37,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:37,970 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:38,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2718,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:38,170 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1670272511, now seen corresponding path program 283 times [2021-06-05 04:42:38,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:38,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793657139] [2021-06-05 04:42:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:38,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:38,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793657139] [2021-06-05 04:42:38,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793657139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:38,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54283579] [2021-06-05 04:42:38,220 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 04:42:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:38,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:38,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:38,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54283579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:38,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:38,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:38,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189978113] [2021-06-05 04:42:38,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:38,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:38,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:38,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:38,472 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 04:42:38,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:38,617 INFO L93 Difference]: Finished difference Result 347 states and 1032 transitions. [2021-06-05 04:42:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:38,617 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 04:42:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:38,618 INFO L225 Difference]: With dead ends: 347 [2021-06-05 04:42:38,618 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 04:42:38,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:38,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 04:42:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 311. [2021-06-05 04:42:38,620 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 04:42:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 927 transitions. [2021-06-05 04:42:38,621 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 927 transitions. Word has length 20 [2021-06-05 04:42:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:38,621 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 927 transitions. [2021-06-05 04:42:38,621 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 04:42:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 927 transitions. [2021-06-05 04:42:38,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:38,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:38,621 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:38,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2724 [2021-06-05 04:42:38,822 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:38,822 INFO L82 PathProgramCache]: Analyzing trace with hash 528543981, now seen corresponding path program 284 times [2021-06-05 04:42:38,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:38,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280298398] [2021-06-05 04:42:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:38,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:38,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280298398] [2021-06-05 04:42:38,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280298398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:38,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150194034] [2021-06-05 04:42:38,877 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 04:42:38,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:38,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:38,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:38,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:39,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150194034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:39,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:39,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:39,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155685804] [2021-06-05 04:42:39,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:39,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:39,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:39,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:39,059 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 04:42:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:39,282 INFO L93 Difference]: Finished difference Result 521 states and 1462 transitions. [2021-06-05 04:42:39,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:42:39,282 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 04:42:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:39,282 INFO L225 Difference]: With dead ends: 521 [2021-06-05 04:42:39,283 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 04:42:39,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:42:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 04:42:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 321. [2021-06-05 04:42:39,286 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 04:42:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 972 transitions. [2021-06-05 04:42:39,286 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 972 transitions. Word has length 20 [2021-06-05 04:42:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:39,286 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 972 transitions. [2021-06-05 04:42:39,287 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 04:42:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 972 transitions. [2021-06-05 04:42:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:39,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:39,287 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:39,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2727,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:39,487 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:39,488 INFO L82 PathProgramCache]: Analyzing trace with hash -965363741, now seen corresponding path program 285 times [2021-06-05 04:42:39,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:39,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107619355] [2021-06-05 04:42:39,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:39,547 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 04:42:39,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:39,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107619355] [2021-06-05 04:42:39,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107619355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:39,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771612135] [2021-06-05 04:42:39,547 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 04:42:39,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:42:39,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:39,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:39,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:39,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771612135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:39,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:39,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:39,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399460866] [2021-06-05 04:42:39,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:39,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:39,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:39,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:39,728 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 04:42:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:39,886 INFO L93 Difference]: Finished difference Result 455 states and 1308 transitions. [2021-06-05 04:42:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:39,886 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 04:42:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:39,886 INFO L225 Difference]: With dead ends: 455 [2021-06-05 04:42:39,887 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 04:42:39,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:39,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 04:42:39,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 324. [2021-06-05 04:42:39,890 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 04:42:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 974 transitions. [2021-06-05 04:42:39,890 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 974 transitions. Word has length 20 [2021-06-05 04:42:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:39,890 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 974 transitions. [2021-06-05 04:42:39,890 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 04:42:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 974 transitions. [2021-06-05 04:42:39,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:39,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:39,891 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:40,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2735,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:40,091 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:40,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1279944419, now seen corresponding path program 286 times [2021-06-05 04:42:40,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:40,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409268528] [2021-06-05 04:42:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:40,164 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 04:42:40,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:40,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409268528] [2021-06-05 04:42:40,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409268528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:40,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13969049] [2021-06-05 04:42:40,164 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 04:42:40,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:40,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:40,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:40,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:40,320 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 04:42:40,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13969049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:40,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:40,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:40,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135452850] [2021-06-05 04:42:40,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:40,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:40,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:40,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:40,321 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 04:42:40,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:40,496 INFO L93 Difference]: Finished difference Result 526 states and 1506 transitions. [2021-06-05 04:42:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:40,497 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 04:42:40,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:40,497 INFO L225 Difference]: With dead ends: 526 [2021-06-05 04:42:40,497 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 04:42:40,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:40,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 04:42:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 327. [2021-06-05 04:42:40,501 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 04:42:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 989 transitions. [2021-06-05 04:42:40,501 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 989 transitions. Word has length 20 [2021-06-05 04:42:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:40,501 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 989 transitions. [2021-06-05 04:42:40,501 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 04:42:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 989 transitions. [2021-06-05 04:42:40,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:40,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:40,502 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:40,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2742,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:40,702 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:40,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:40,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1722680477, now seen corresponding path program 287 times [2021-06-05 04:42:40,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:40,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615886239] [2021-06-05 04:42:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:40,759 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 04:42:40,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:40,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615886239] [2021-06-05 04:42:40,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615886239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:40,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281393307] [2021-06-05 04:42:40,759 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 04:42:40,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:40,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:40,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:40,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:40,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281393307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:40,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:40,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:40,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465794409] [2021-06-05 04:42:40,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:40,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:40,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:40,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:40,939 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 04:42:41,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:41,073 INFO L93 Difference]: Finished difference Result 495 states and 1439 transitions. [2021-06-05 04:42:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:41,073 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 04:42:41,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:41,074 INFO L225 Difference]: With dead ends: 495 [2021-06-05 04:42:41,074 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 04:42:41,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 04:42:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 324. [2021-06-05 04:42:41,077 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 04:42:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 974 transitions. [2021-06-05 04:42:41,078 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 974 transitions. Word has length 20 [2021-06-05 04:42:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:41,078 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 974 transitions. [2021-06-05 04:42:41,078 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 04:42:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 974 transitions. [2021-06-05 04:42:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:41,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:41,078 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 04:42:41,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2751 [2021-06-05 04:42:41,279 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:41,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:41,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1300680947, now seen corresponding path program 288 times [2021-06-05 04:42:41,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:41,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115659332] [2021-06-05 04:42:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:41,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:41,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115659332] [2021-06-05 04:42:41,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115659332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:41,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245020624] [2021-06-05 04:42:41,332 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 04:42:41,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:42:41,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:41,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:41,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:41,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245020624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:41,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:41,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:41,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188338086] [2021-06-05 04:42:41,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:41,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:41,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:41,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:41,513 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 04:42:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:41,669 INFO L93 Difference]: Finished difference Result 492 states and 1387 transitions. [2021-06-05 04:42:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:41,670 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 04:42:41,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:41,670 INFO L225 Difference]: With dead ends: 492 [2021-06-05 04:42:41,670 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 04:42:41,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:41,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 04:42:41,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2021-06-05 04:42:41,673 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 04:42:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 988 transitions. [2021-06-05 04:42:41,674 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 988 transitions. Word has length 20 [2021-06-05 04:42:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:41,674 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 988 transitions. [2021-06-05 04:42:41,674 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 04:42:41,674 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 988 transitions. [2021-06-05 04:42:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:41,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:41,675 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:41,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2759,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:41,875 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:41,875 INFO L82 PathProgramCache]: Analyzing trace with hash -614742979, now seen corresponding path program 289 times [2021-06-05 04:42:41,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:41,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498124656] [2021-06-05 04:42:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:41,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:41,929 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 04:42:41,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:41,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498124656] [2021-06-05 04:42:41,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498124656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:41,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667650928] [2021-06-05 04:42:41,929 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 04:42:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:42,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:42,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:42,080 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 04:42:42,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667650928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:42,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:42,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:42,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950480270] [2021-06-05 04:42:42,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:42,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:42,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:42,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:42,081 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 04:42:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:42,308 INFO L93 Difference]: Finished difference Result 498 states and 1408 transitions. [2021-06-05 04:42:42,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:42:42,309 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 04:42:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:42,309 INFO L225 Difference]: With dead ends: 498 [2021-06-05 04:42:42,310 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 04:42:42,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:42,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 04:42:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 325. [2021-06-05 04:42:42,313 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 04:42:42,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 978 transitions. [2021-06-05 04:42:42,314 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 978 transitions. Word has length 20 [2021-06-05 04:42:42,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:42,314 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 978 transitions. [2021-06-05 04:42:42,314 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 04:42:42,314 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 978 transitions. [2021-06-05 04:42:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:42,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:42,314 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:42,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2766 [2021-06-05 04:42:42,515 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:42,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:42,515 INFO L82 PathProgramCache]: Analyzing trace with hash -832484211, now seen corresponding path program 290 times [2021-06-05 04:42:42,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:42,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532555474] [2021-06-05 04:42:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:42,574 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 04:42:42,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:42,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532555474] [2021-06-05 04:42:42,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532555474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:42,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395552857] [2021-06-05 04:42:42,574 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 04:42:42,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:42,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:42,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:42,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:42,726 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 04:42:42,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395552857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:42,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:42,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:42,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555770549] [2021-06-05 04:42:42,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:42,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:42,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:42,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:42,727 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 04:42:42,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:42,889 INFO L93 Difference]: Finished difference Result 431 states and 1265 transitions. [2021-06-05 04:42:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:42,889 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 04:42:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:42,890 INFO L225 Difference]: With dead ends: 431 [2021-06-05 04:42:42,890 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 04:42:42,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:42,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 04:42:42,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 326. [2021-06-05 04:42:42,893 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 04:42:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 980 transitions. [2021-06-05 04:42:42,893 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 980 transitions. Word has length 20 [2021-06-05 04:42:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:42,894 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 980 transitions. [2021-06-05 04:42:42,894 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 04:42:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 980 transitions. [2021-06-05 04:42:42,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:42,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:42,894 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:43,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2774,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:43,094 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:43,095 INFO L82 PathProgramCache]: Analyzing trace with hash 459858189, now seen corresponding path program 291 times [2021-06-05 04:42:43,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:43,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189532552] [2021-06-05 04:42:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:43,154 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 04:42:43,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:43,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189532552] [2021-06-05 04:42:43,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189532552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:43,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286704732] [2021-06-05 04:42:43,155 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 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 04:42:43,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:42:43,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:43,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:43,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:43,304 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 04:42:43,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286704732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:43,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:43,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:43,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967958777] [2021-06-05 04:42:43,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:43,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:43,305 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 04:42:43,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:43,490 INFO L93 Difference]: Finished difference Result 425 states and 1247 transitions. [2021-06-05 04:42:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:43,490 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 04:42:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:43,491 INFO L225 Difference]: With dead ends: 425 [2021-06-05 04:42:43,491 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 04:42:43,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 158.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 04:42:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 315. [2021-06-05 04:42:43,494 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 04:42:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 943 transitions. [2021-06-05 04:42:43,494 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 943 transitions. Word has length 20 [2021-06-05 04:42:43,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:43,494 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 943 transitions. [2021-06-05 04:42:43,494 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 04:42:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 943 transitions. [2021-06-05 04:42:43,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:43,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:43,495 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 04:42:43,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2780,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:43,695 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:43,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:43,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1436006847, now seen corresponding path program 292 times [2021-06-05 04:42:43,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:43,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394644923] [2021-06-05 04:42:43,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:43,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:43,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394644923] [2021-06-05 04:42:43,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394644923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:43,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161061568] [2021-06-05 04:42:43,753 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 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 04:42:43,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:43,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:43,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:43,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:43,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161061568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:43,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:43,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:43,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089475834] [2021-06-05 04:42:43,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:43,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:43,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:43,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:43,939 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 04:42:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:44,091 INFO L93 Difference]: Finished difference Result 386 states and 1140 transitions. [2021-06-05 04:42:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:44,091 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 04:42:44,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:44,092 INFO L225 Difference]: With dead ends: 386 [2021-06-05 04:42:44,092 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 04:42:44,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 04:42:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 312. [2021-06-05 04:42:44,095 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 04:42:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 931 transitions. [2021-06-05 04:42:44,095 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 931 transitions. Word has length 20 [2021-06-05 04:42:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:44,095 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 931 transitions. [2021-06-05 04:42:44,095 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 04:42:44,095 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 931 transitions. [2021-06-05 04:42:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:44,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:44,096 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:44,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2786,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:44,296 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:44,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2079204861, now seen corresponding path program 293 times [2021-06-05 04:42:44,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:44,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805905354] [2021-06-05 04:42:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:44,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:44,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805905354] [2021-06-05 04:42:44,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805905354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:44,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030621612] [2021-06-05 04:42:44,347 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 04:42:44,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:42:44,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:44,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:44,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:44,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030621612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:44,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:44,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:44,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881556220] [2021-06-05 04:42:44,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:44,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:44,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:44,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:44,499 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 04:42:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:44,649 INFO L93 Difference]: Finished difference Result 393 states and 1130 transitions. [2021-06-05 04:42:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:44,649 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 04:42:44,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:44,650 INFO L225 Difference]: With dead ends: 393 [2021-06-05 04:42:44,650 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 04:42:44,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 04:42:44,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 326. [2021-06-05 04:42:44,653 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 04:42:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 970 transitions. [2021-06-05 04:42:44,653 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 970 transitions. Word has length 20 [2021-06-05 04:42:44,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:44,653 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 970 transitions. [2021-06-05 04:42:44,653 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 04:42:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 970 transitions. [2021-06-05 04:42:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:44,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:44,654 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:44,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2791,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:44,854 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:44,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:44,854 INFO L82 PathProgramCache]: Analyzing trace with hash 300338509, now seen corresponding path program 294 times [2021-06-05 04:42:44,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:44,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349765861] [2021-06-05 04:42:44,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:44,906 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 04:42:44,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:44,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349765861] [2021-06-05 04:42:44,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349765861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:44,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235113936] [2021-06-05 04:42:44,906 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 04:42:44,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:42:44,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:44,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:44,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:45,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235113936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:45,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:45,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:45,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007353696] [2021-06-05 04:42:45,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:45,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:45,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:45,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:45,056 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 04:42:45,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:45,225 INFO L93 Difference]: Finished difference Result 399 states and 1151 transitions. [2021-06-05 04:42:45,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:42:45,225 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 04:42:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:45,226 INFO L225 Difference]: With dead ends: 399 [2021-06-05 04:42:45,226 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 04:42:45,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 04:42:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 324. [2021-06-05 04:42:45,229 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 04:42:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 965 transitions. [2021-06-05 04:42:45,229 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 965 transitions. Word has length 20 [2021-06-05 04:42:45,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:45,229 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 965 transitions. [2021-06-05 04:42:45,229 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 04:42:45,229 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 965 transitions. [2021-06-05 04:42:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:45,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:45,230 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 04:42:45,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2798 [2021-06-05 04:42:45,430 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:45,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:45,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1340574307, now seen corresponding path program 295 times [2021-06-05 04:42:45,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:45,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015003384] [2021-06-05 04:42:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:45,481 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 04:42:45,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:45,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015003384] [2021-06-05 04:42:45,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015003384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:45,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044053525] [2021-06-05 04:42:45,482 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 04:42:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:45,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:45,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:45,627 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 04:42:45,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044053525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:45,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:45,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:45,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617962693] [2021-06-05 04:42:45,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:45,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:45,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:45,628 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 04:42:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:45,784 INFO L93 Difference]: Finished difference Result 368 states and 1086 transitions. [2021-06-05 04:42:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:45,785 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 04:42:45,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:45,785 INFO L225 Difference]: With dead ends: 368 [2021-06-05 04:42:45,785 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 04:42:45,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 04:42:45,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 309. [2021-06-05 04:42:45,788 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 04:42:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 921 transitions. [2021-06-05 04:42:45,788 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 921 transitions. Word has length 20 [2021-06-05 04:42:45,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:45,788 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 921 transitions. [2021-06-05 04:42:45,788 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 04:42:45,788 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 921 transitions. [2021-06-05 04:42:45,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:45,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:45,789 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:45,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2806,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:45,989 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:45,989 INFO L82 PathProgramCache]: Analyzing trace with hash -498001455, now seen corresponding path program 296 times [2021-06-05 04:42:45,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:45,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898355192] [2021-06-05 04:42:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:46,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:46,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898355192] [2021-06-05 04:42:46,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898355192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:46,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302693142] [2021-06-05 04:42:46,052 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 04:42:46,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:46,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:46,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:46,238 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 04:42:46,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302693142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:46,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:46,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:46,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785893109] [2021-06-05 04:42:46,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:46,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:46,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:46,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:46,239 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 04:42:46,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:46,474 INFO L93 Difference]: Finished difference Result 369 states and 1070 transitions. [2021-06-05 04:42:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:46,475 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 04:42:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:46,475 INFO L225 Difference]: With dead ends: 369 [2021-06-05 04:42:46,475 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 04:42:46,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 04:42:46,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 317. [2021-06-05 04:42:46,478 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 04:42:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 952 transitions. [2021-06-05 04:42:46,478 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 952 transitions. Word has length 20 [2021-06-05 04:42:46,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:46,479 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 952 transitions. [2021-06-05 04:42:46,479 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 04:42:46,479 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 952 transitions. [2021-06-05 04:42:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:46,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:46,479 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:46,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2811,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:46,679 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:46,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1991909177, now seen corresponding path program 297 times [2021-06-05 04:42:46,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:46,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746474897] [2021-06-05 04:42:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:46,740 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 04:42:46,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:46,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746474897] [2021-06-05 04:42:46,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746474897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:46,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128671987] [2021-06-05 04:42:46,741 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 04:42:46,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:42:46,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:46,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:46,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:46,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128671987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:46,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:46,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:46,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552935403] [2021-06-05 04:42:46,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:46,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:46,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:46,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:46,937 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 04:42:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:47,182 INFO L93 Difference]: Finished difference Result 375 states and 1077 transitions. [2021-06-05 04:42:47,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:47,182 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 04:42:47,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:47,183 INFO L225 Difference]: With dead ends: 375 [2021-06-05 04:42:47,183 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 04:42:47,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 04:42:47,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 314. [2021-06-05 04:42:47,186 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 04:42:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 941 transitions. [2021-06-05 04:42:47,186 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 941 transitions. Word has length 20 [2021-06-05 04:42:47,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:47,186 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 941 transitions. [2021-06-05 04:42:47,186 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 04:42:47,186 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 941 transitions. [2021-06-05 04:42:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:47,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:47,187 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:47,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2821 [2021-06-05 04:42:47,402 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:47,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:47,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1454053599, now seen corresponding path program 298 times [2021-06-05 04:42:47,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:47,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156547567] [2021-06-05 04:42:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:47,451 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 04:42:47,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:47,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156547567] [2021-06-05 04:42:47,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156547567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:47,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687649126] [2021-06-05 04:42:47,451 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 04:42:47,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:47,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:47,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:47,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:47,667 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 04:42:47,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687649126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:47,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:47,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:47,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047941641] [2021-06-05 04:42:47,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:47,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:47,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:47,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:47,668 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 04:42:47,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:47,999 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-06-05 04:42:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:47,999 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 04:42:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:48,000 INFO L225 Difference]: With dead ends: 339 [2021-06-05 04:42:48,000 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 04:42:48,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 354.5ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:48,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 04:42:48,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 311. [2021-06-05 04:42:48,002 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 04:42:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-05 04:42:48,003 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-05 04:42:48,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:48,003 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-05 04:42:48,003 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 04:42:48,003 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-05 04:42:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:48,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:48,003 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:48,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2833,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:48,204 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1320575643, now seen corresponding path program 299 times [2021-06-05 04:42:48,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:48,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663693838] [2021-06-05 04:42:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:48,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:48,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663693838] [2021-06-05 04:42:48,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663693838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:48,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129114920] [2021-06-05 04:42:48,268 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 04:42:48,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:48,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:48,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:48,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:48,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129114920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:48,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:48,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:48,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561431563] [2021-06-05 04:42:48,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:48,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:48,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:48,483 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 04:42:48,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:48,692 INFO L93 Difference]: Finished difference Result 456 states and 1288 transitions. [2021-06-05 04:42:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:48,692 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 04:42:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:48,693 INFO L225 Difference]: With dead ends: 456 [2021-06-05 04:42:48,693 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 04:42:48,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 04:42:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 319. [2021-06-05 04:42:48,696 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 04:42:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 966 transitions. [2021-06-05 04:42:48,697 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 966 transitions. Word has length 20 [2021-06-05 04:42:48,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:48,697 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 966 transitions. [2021-06-05 04:42:48,697 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 04:42:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 966 transitions. [2021-06-05 04:42:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:48,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:48,697 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 04:42:48,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2842 [2021-06-05 04:42:48,898 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:48,898 INFO L82 PathProgramCache]: Analyzing trace with hash -173332079, now seen corresponding path program 300 times [2021-06-05 04:42:48,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:48,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124915443] [2021-06-05 04:42:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:48,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:48,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124915443] [2021-06-05 04:42:48,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124915443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:48,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554915859] [2021-06-05 04:42:48,962 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 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 04:42:49,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:42:49,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:49,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:49,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:49,183 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 04:42:49,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554915859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:49,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:49,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:49,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725373123] [2021-06-05 04:42:49,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:49,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:49,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:49,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:49,184 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 04:42:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:49,381 INFO L93 Difference]: Finished difference Result 462 states and 1289 transitions. [2021-06-05 04:42:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:49,381 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 04:42:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:49,381 INFO L225 Difference]: With dead ends: 462 [2021-06-05 04:42:49,381 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 04:42:49,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:49,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 04:42:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 322. [2021-06-05 04:42:49,385 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 04:42:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 968 transitions. [2021-06-05 04:42:49,385 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 968 transitions. Word has length 20 [2021-06-05 04:42:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:49,385 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 968 transitions. [2021-06-05 04:42:49,385 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 04:42:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 968 transitions. [2021-06-05 04:42:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:49,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:49,386 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:49,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2856,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:49,586 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:49,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:49,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2071976081, now seen corresponding path program 301 times [2021-06-05 04:42:49,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:49,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506573468] [2021-06-05 04:42:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:49,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:49,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506573468] [2021-06-05 04:42:49,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506573468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:49,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486053108] [2021-06-05 04:42:49,651 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 04:42:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:49,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:49,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:49,850 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 04:42:49,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486053108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:49,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:49,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:49,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679522787] [2021-06-05 04:42:49,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:49,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:49,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:49,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:49,851 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 04:42:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:50,027 INFO L93 Difference]: Finished difference Result 424 states and 1209 transitions. [2021-06-05 04:42:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:50,028 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 04:42:50,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:50,028 INFO L225 Difference]: With dead ends: 424 [2021-06-05 04:42:50,028 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 04:42:50,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 04:42:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 315. [2021-06-05 04:42:50,031 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 04:42:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 950 transitions. [2021-06-05 04:42:50,032 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 950 transitions. Word has length 20 [2021-06-05 04:42:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:50,032 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 950 transitions. [2021-06-05 04:42:50,032 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 04:42:50,032 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 950 transitions. [2021-06-05 04:42:50,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:50,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:50,032 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 04:42:50,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2870 [2021-06-05 04:42:50,233 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:50,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:50,233 INFO L82 PathProgramCache]: Analyzing trace with hash -930648815, now seen corresponding path program 302 times [2021-06-05 04:42:50,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:50,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267128723] [2021-06-05 04:42:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:50,297 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 04:42:50,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:50,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267128723] [2021-06-05 04:42:50,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267128723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:50,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189981691] [2021-06-05 04:42:50,297 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 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 04:42:50,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:50,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:50,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:50,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:50,484 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 04:42:50,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189981691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:50,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:50,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:50,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572884906] [2021-06-05 04:42:50,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:50,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:50,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:50,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:50,485 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 04:42:50,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:50,694 INFO L93 Difference]: Finished difference Result 387 states and 1127 transitions. [2021-06-05 04:42:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:50,694 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 04:42:50,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:50,695 INFO L225 Difference]: With dead ends: 387 [2021-06-05 04:42:50,695 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 04:42:50,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 04:42:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 312. [2021-06-05 04:42:50,697 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 04:42:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2021-06-05 04:42:50,698 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2021-06-05 04:42:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:50,698 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2021-06-05 04:42:50,698 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 04:42:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2021-06-05 04:42:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:50,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:50,698 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:50,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2885 [2021-06-05 04:42:50,899 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:50,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash 2092712609, now seen corresponding path program 303 times [2021-06-05 04:42:50,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:50,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250717082] [2021-06-05 04:42:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:50,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:50,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:50,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250717082] [2021-06-05 04:42:50,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250717082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:50,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934154749] [2021-06-05 04:42:50,960 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 04:42:51,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:42:51,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:51,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:51,160 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 04:42:51,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934154749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:51,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:51,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:51,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604779439] [2021-06-05 04:42:51,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:51,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:51,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:51,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:51,160 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 04:42:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:51,347 INFO L93 Difference]: Finished difference Result 424 states and 1201 transitions. [2021-06-05 04:42:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:51,348 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 04:42:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:51,348 INFO L225 Difference]: With dead ends: 424 [2021-06-05 04:42:51,348 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 04:42:51,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:51,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 04:42:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 322. [2021-06-05 04:42:51,351 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 04:42:51,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 962 transitions. [2021-06-05 04:42:51,352 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 962 transitions. Word has length 20 [2021-06-05 04:42:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:51,352 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 962 transitions. [2021-06-05 04:42:51,352 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 04:42:51,352 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 962 transitions. [2021-06-05 04:42:51,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:51,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:51,352 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:51,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2896 [2021-06-05 04:42:51,553 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:51,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:51,553 INFO L82 PathProgramCache]: Analyzing trace with hash 177288683, now seen corresponding path program 304 times [2021-06-05 04:42:51,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:51,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008316768] [2021-06-05 04:42:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:51,616 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 04:42:51,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:51,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008316768] [2021-06-05 04:42:51,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008316768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:51,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318542444] [2021-06-05 04:42:51,617 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 04:42:51,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:51,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:51,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:51,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:51,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318542444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:51,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:51,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:51,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829736491] [2021-06-05 04:42:51,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:51,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:51,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:51,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:51,791 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 04:42:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:51,971 INFO L93 Difference]: Finished difference Result 401 states and 1162 transitions. [2021-06-05 04:42:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:51,971 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 04:42:51,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:51,972 INFO L225 Difference]: With dead ends: 401 [2021-06-05 04:42:51,972 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 04:42:51,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:51,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 04:42:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 311. [2021-06-05 04:42:51,975 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 04:42:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-05 04:42:51,975 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-05 04:42:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:51,975 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-05 04:42:51,975 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 04:42:51,975 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-05 04:42:51,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:51,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:51,976 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 04:42:52,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2904,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:52,179 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:52,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:52,179 INFO L82 PathProgramCache]: Analyzing trace with hash 73854993, now seen corresponding path program 305 times [2021-06-05 04:42:52,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:52,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126717923] [2021-06-05 04:42:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:52,226 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 04:42:52,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:52,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126717923] [2021-06-05 04:42:52,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126717923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:52,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283763687] [2021-06-05 04:42:52,227 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 04:42:52,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:52,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:52,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:52,417 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 04:42:52,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283763687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:52,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:52,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:52,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073913514] [2021-06-05 04:42:52,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:52,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:52,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:52,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:52,418 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 04:42:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:52,663 INFO L93 Difference]: Finished difference Result 341 states and 999 transitions. [2021-06-05 04:42:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:52,664 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 04:42:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:52,664 INFO L225 Difference]: With dead ends: 341 [2021-06-05 04:42:52,664 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 04:42:52,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 04:42:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 313. [2021-06-05 04:42:52,667 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 04:42:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 935 transitions. [2021-06-05 04:42:52,667 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 935 transitions. Word has length 20 [2021-06-05 04:42:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:52,667 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 935 transitions. [2021-06-05 04:42:52,667 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 04:42:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 935 transitions. [2021-06-05 04:42:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:52,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:52,668 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:52,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2912,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:52,868 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:52,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:52,868 INFO L82 PathProgramCache]: Analyzing trace with hash 825255431, now seen corresponding path program 306 times [2021-06-05 04:42:52,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:52,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887816041] [2021-06-05 04:42:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:52,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:52,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887816041] [2021-06-05 04:42:52,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887816041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:52,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948997885] [2021-06-05 04:42:52,917 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 04:42:52,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:42:52,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:52,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:52,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:53,109 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 04:42:53,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948997885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:53,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:53,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:53,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810388970] [2021-06-05 04:42:53,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:53,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:53,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:53,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:53,109 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 04:42:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:53,366 INFO L93 Difference]: Finished difference Result 366 states and 1051 transitions. [2021-06-05 04:42:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:42:53,367 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 04:42:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:53,367 INFO L225 Difference]: With dead ends: 366 [2021-06-05 04:42:53,367 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 04:42:53,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:42:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 04:42:53,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 323. [2021-06-05 04:42:53,370 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 04:42:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-06-05 04:42:53,370 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 20 [2021-06-05 04:42:53,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:53,371 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-06-05 04:42:53,371 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 04:42:53,371 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-06-05 04:42:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:53,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:53,371 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 04:42:53,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2922 [2021-06-05 04:42:53,571 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:53,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:53,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1090168495, now seen corresponding path program 307 times [2021-06-05 04:42:53,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:53,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754525352] [2021-06-05 04:42:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:53,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:53,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754525352] [2021-06-05 04:42:53,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754525352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:53,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872364496] [2021-06-05 04:42:53,622 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 04:42:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:53,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:53,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:53,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872364496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:53,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:53,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:53,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000113686] [2021-06-05 04:42:53,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:53,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:53,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:53,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:53,830 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 04:42:54,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:54,062 INFO L93 Difference]: Finished difference Result 337 states and 997 transitions. [2021-06-05 04:42:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:54,062 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 04:42:54,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:54,063 INFO L225 Difference]: With dead ends: 337 [2021-06-05 04:42:54,063 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 04:42:54,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 04:42:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 310. [2021-06-05 04:42:54,065 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 04:42:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 925 transitions. [2021-06-05 04:42:54,066 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 925 transitions. Word has length 20 [2021-06-05 04:42:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:54,066 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 925 transitions. [2021-06-05 04:42:54,066 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 04:42:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 925 transitions. [2021-06-05 04:42:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:54,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:54,066 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:54,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2933,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:54,267 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:54,267 INFO L82 PathProgramCache]: Analyzing trace with hash 259797553, now seen corresponding path program 308 times [2021-06-05 04:42:54,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:54,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098624300] [2021-06-05 04:42:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:54,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:54,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098624300] [2021-06-05 04:42:54,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098624300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:54,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317039485] [2021-06-05 04:42:54,334 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 04:42:54,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:54,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:54,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:54,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:54,500 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 04:42:54,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317039485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:54,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:54,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:54,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255310119] [2021-06-05 04:42:54,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:54,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:54,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:54,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:54,501 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 04:42:54,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:54,619 INFO L93 Difference]: Finished difference Result 414 states and 1199 transitions. [2021-06-05 04:42:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:54,619 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 04:42:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:54,620 INFO L225 Difference]: With dead ends: 414 [2021-06-05 04:42:54,620 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:42:54,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:54,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:42:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 320. [2021-06-05 04:42:54,623 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 04:42:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 970 transitions. [2021-06-05 04:42:54,624 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 970 transitions. Word has length 20 [2021-06-05 04:42:54,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:54,624 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 970 transitions. [2021-06-05 04:42:54,624 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 04:42:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 970 transitions. [2021-06-05 04:42:54,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:54,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:54,624 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 04:42:54,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:54,825 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:54,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:54,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1234110169, now seen corresponding path program 309 times [2021-06-05 04:42:54,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:54,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614931003] [2021-06-05 04:42:54,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:54,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:54,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:54,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614931003] [2021-06-05 04:42:54,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614931003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:54,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666330295] [2021-06-05 04:42:54,881 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 04:42:54,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:42:54,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:54,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:55,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666330295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:55,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:55,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:55,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78415658] [2021-06-05 04:42:55,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:55,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:55,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:55,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:55,069 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 04:42:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:55,243 INFO L93 Difference]: Finished difference Result 420 states and 1200 transitions. [2021-06-05 04:42:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:55,243 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 04:42:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:55,243 INFO L225 Difference]: With dead ends: 420 [2021-06-05 04:42:55,244 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:42:55,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:55,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:42:55,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-06-05 04:42:55,247 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 04:42:55,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-06-05 04:42:55,247 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-06-05 04:42:55,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:55,247 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-06-05 04:42:55,247 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 04:42:55,247 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-06-05 04:42:55,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:55,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:55,248 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 04:42:55,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2953 [2021-06-05 04:42:55,448 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:55,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1011197991, now seen corresponding path program 310 times [2021-06-05 04:42:55,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:55,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36820117] [2021-06-05 04:42:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:55,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:55,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36820117] [2021-06-05 04:42:55,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36820117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:55,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698766345] [2021-06-05 04:42:55,504 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 04:42:55,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:55,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:55,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:55,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:55,681 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 04:42:55,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698766345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:55,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:55,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:55,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055389726] [2021-06-05 04:42:55,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:55,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:55,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:55,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:55,681 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 04:42:55,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:55,855 INFO L93 Difference]: Finished difference Result 472 states and 1342 transitions. [2021-06-05 04:42:55,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:42:55,855 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 04:42:55,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:55,856 INFO L225 Difference]: With dead ends: 472 [2021-06-05 04:42:55,856 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 04:42:55,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 04:42:55,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 326. [2021-06-05 04:42:55,859 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 04:42:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 987 transitions. [2021-06-05 04:42:55,859 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 987 transitions. Word has length 20 [2021-06-05 04:42:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:55,860 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 987 transitions. [2021-06-05 04:42:55,860 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 04:42:55,860 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 987 transitions. [2021-06-05 04:42:55,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:55,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:55,860 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:56,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2962 [2021-06-05 04:42:56,060 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:56,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1991426905, now seen corresponding path program 311 times [2021-06-05 04:42:56,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:56,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878702279] [2021-06-05 04:42:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:56,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878702279] [2021-06-05 04:42:56,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878702279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360960215] [2021-06-05 04:42:56,125 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 04:42:56,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:56,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:56,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:56,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:56,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360960215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:56,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:56,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:56,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162000952] [2021-06-05 04:42:56,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:56,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:56,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:56,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:56,318 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 04:42:56,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:56,536 INFO L93 Difference]: Finished difference Result 435 states and 1260 transitions. [2021-06-05 04:42:56,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:42:56,537 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 04:42:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:56,537 INFO L225 Difference]: With dead ends: 435 [2021-06-05 04:42:56,537 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 04:42:56,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:42:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 04:42:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 323. [2021-06-05 04:42:56,540 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 04:42:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 972 transitions. [2021-06-05 04:42:56,541 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 972 transitions. Word has length 20 [2021-06-05 04:42:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:56,541 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 972 transitions. [2021-06-05 04:42:56,541 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 04:42:56,541 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 972 transitions. [2021-06-05 04:42:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:56,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:56,541 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 04:42:56,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2971 [2021-06-05 04:42:56,742 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1031934519, now seen corresponding path program 312 times [2021-06-05 04:42:56,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:56,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398884941] [2021-06-05 04:42:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:56,795 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 04:42:56,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:56,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398884941] [2021-06-05 04:42:56,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398884941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:56,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636276630] [2021-06-05 04:42:56,795 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 04:42:56,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:42:56,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:56,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:56,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:56,974 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 04:42:56,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636276630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:56,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:56,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:56,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991075423] [2021-06-05 04:42:56,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:56,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:56,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:56,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:56,975 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 04:42:57,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:57,215 INFO L93 Difference]: Finished difference Result 460 states and 1294 transitions. [2021-06-05 04:42:57,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:42:57,215 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 04:42:57,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:57,216 INFO L225 Difference]: With dead ends: 460 [2021-06-05 04:42:57,216 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 04:42:57,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:42:57,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 04:42:57,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 327. [2021-06-05 04:42:57,219 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 04:42:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 986 transitions. [2021-06-05 04:42:57,220 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 986 transitions. Word has length 20 [2021-06-05 04:42:57,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:57,220 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 986 transitions. [2021-06-05 04:42:57,220 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 04:42:57,220 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 986 transitions. [2021-06-05 04:42:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:57,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:57,220 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:57,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-06-05 04:42:57,421 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:57,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:57,421 INFO L82 PathProgramCache]: Analyzing trace with hash -883489407, now seen corresponding path program 313 times [2021-06-05 04:42:57,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:57,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343247550] [2021-06-05 04:42:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:57,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:57,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:57,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343247550] [2021-06-05 04:42:57,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343247550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:57,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623478726] [2021-06-05 04:42:57,476 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 04:42:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:57,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:57,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:57,666 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 04:42:57,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623478726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:57,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:57,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:57,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394147591] [2021-06-05 04:42:57,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:57,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:57,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:57,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:57,667 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 04:42:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:57,885 INFO L93 Difference]: Finished difference Result 443 states and 1276 transitions. [2021-06-05 04:42:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:42:57,885 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 04:42:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:57,886 INFO L225 Difference]: With dead ends: 443 [2021-06-05 04:42:57,886 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 04:42:57,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:42:57,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 04:42:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 324. [2021-06-05 04:42:57,889 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 04:42:57,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 976 transitions. [2021-06-05 04:42:57,890 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 976 transitions. Word has length 20 [2021-06-05 04:42:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:57,890 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 976 transitions. [2021-06-05 04:42:57,890 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 04:42:57,890 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 976 transitions. [2021-06-05 04:42:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:57,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:57,890 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:58,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2991 [2021-06-05 04:42:58,091 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:58,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:58,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1101230639, now seen corresponding path program 314 times [2021-06-05 04:42:58,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:58,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229460803] [2021-06-05 04:42:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:58,147 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 04:42:58,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:58,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229460803] [2021-06-05 04:42:58,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229460803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:58,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030265652] [2021-06-05 04:42:58,148 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 04:42:58,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:42:58,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:58,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:58,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:58,331 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 04:42:58,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030265652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:58,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:58,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:58,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322010484] [2021-06-05 04:42:58,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:58,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:58,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:58,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:58,332 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 04:42:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:58,482 INFO L93 Difference]: Finished difference Result 396 states and 1160 transitions. [2021-06-05 04:42:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:58,482 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 04:42:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:58,483 INFO L225 Difference]: With dead ends: 396 [2021-06-05 04:42:58,483 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 04:42:58,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 04:42:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 325. [2021-06-05 04:42:58,486 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 04:42:58,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 978 transitions. [2021-06-05 04:42:58,486 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 978 transitions. Word has length 20 [2021-06-05 04:42:58,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:58,486 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 978 transitions. [2021-06-05 04:42:58,486 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 04:42:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 978 transitions. [2021-06-05 04:42:58,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:58,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:58,487 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:58,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:58,687 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:58,687 INFO L82 PathProgramCache]: Analyzing trace with hash 191111761, now seen corresponding path program 315 times [2021-06-05 04:42:58,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:58,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142653840] [2021-06-05 04:42:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:58,743 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 04:42:58,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:58,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142653840] [2021-06-05 04:42:58,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142653840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:58,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867579058] [2021-06-05 04:42:58,744 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 04:42:58,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:42:58,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:58,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:58,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:58,926 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 04:42:58,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867579058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:58,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:58,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:58,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239775643] [2021-06-05 04:42:58,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:58,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:58,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:58,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:58,927 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 04:42:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:59,083 INFO L93 Difference]: Finished difference Result 384 states and 1127 transitions. [2021-06-05 04:42:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:42:59,083 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 04:42:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:59,083 INFO L225 Difference]: With dead ends: 384 [2021-06-05 04:42:59,083 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 04:42:59,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:42:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 04:42:59,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 314. [2021-06-05 04:42:59,086 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 04:42:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 941 transitions. [2021-06-05 04:42:59,087 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 941 transitions. Word has length 20 [2021-06-05 04:42:59,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:59,087 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 941 transitions. [2021-06-05 04:42:59,087 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 04:42:59,087 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 941 transitions. [2021-06-05 04:42:59,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:59,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:59,087 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 04:42:59,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3009,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:42:59,288 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:59,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:59,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1704753275, now seen corresponding path program 316 times [2021-06-05 04:42:59,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:59,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258939291] [2021-06-05 04:42:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:59,342 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 04:42:59,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:59,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258939291] [2021-06-05 04:42:59,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258939291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:59,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662279988] [2021-06-05 04:42:59,343 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 04:42:59,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:42:59,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:59,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:59,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:42:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:59,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662279988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:59,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:42:59,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:42:59,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6844694] [2021-06-05 04:42:59,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:42:59,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:42:59,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:42:59,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:42:59,500 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 04:42:59,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:42:59,635 INFO L93 Difference]: Finished difference Result 339 states and 1005 transitions. [2021-06-05 04:42:59,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:42:59,635 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 04:42:59,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:42:59,635 INFO L225 Difference]: With dead ends: 339 [2021-06-05 04:42:59,635 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 04:42:59,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:42:59,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 04:42:59,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 311. [2021-06-05 04:42:59,638 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 04:42:59,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 929 transitions. [2021-06-05 04:42:59,638 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 929 transitions. Word has length 20 [2021-06-05 04:42:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:42:59,639 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 929 transitions. [2021-06-05 04:42:59,639 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 04:42:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 929 transitions. [2021-06-05 04:42:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:42:59,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:42:59,639 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:42:59,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-06-05 04:42:59,839 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:42:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:42:59,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1947016007, now seen corresponding path program 317 times [2021-06-05 04:42:59,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:42:59,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284372701] [2021-06-05 04:42:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:42:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:42:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:42:59,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:42:59,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284372701] [2021-06-05 04:42:59,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284372701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:42:59,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301998913] [2021-06-05 04:42:59,891 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 04:42:59,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:42:59,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:42:59,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:42:59,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:00,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301998913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:00,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:00,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:00,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175106288] [2021-06-05 04:43:00,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:00,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:00,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:00,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:00,076 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 04:43:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:00,201 INFO L93 Difference]: Finished difference Result 384 states and 1099 transitions. [2021-06-05 04:43:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:00,202 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 04:43:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:00,202 INFO L225 Difference]: With dead ends: 384 [2021-06-05 04:43:00,202 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 04:43:00,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 04:43:00,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 325. [2021-06-05 04:43:00,205 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 04:43:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 968 transitions. [2021-06-05 04:43:00,205 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 968 transitions. Word has length 20 [2021-06-05 04:43:00,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:00,206 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 968 transitions. [2021-06-05 04:43:00,206 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 04:43:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 968 transitions. [2021-06-05 04:43:00,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:00,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:00,206 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:00,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:00,406 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:00,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:00,407 INFO L82 PathProgramCache]: Analyzing trace with hash 31592081, now seen corresponding path program 318 times [2021-06-05 04:43:00,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:00,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613855022] [2021-06-05 04:43:00,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:00,465 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 04:43:00,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:00,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613855022] [2021-06-05 04:43:00,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613855022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:00,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441728800] [2021-06-05 04:43:00,465 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 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 04:43:00,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:43:00,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:00,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:00,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:00,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441728800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:00,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:00,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:00,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112309648] [2021-06-05 04:43:00,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:00,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:00,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:00,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:00,625 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 04:43:00,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:00,809 INFO L93 Difference]: Finished difference Result 390 states and 1120 transitions. [2021-06-05 04:43:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:43:00,810 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 04:43:00,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:00,810 INFO L225 Difference]: With dead ends: 390 [2021-06-05 04:43:00,810 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 04:43:00,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:00,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 04:43:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 323. [2021-06-05 04:43:00,813 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 04:43:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-06-05 04:43:00,814 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 20 [2021-06-05 04:43:00,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:00,814 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-06-05 04:43:00,814 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 04:43:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-06-05 04:43:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:00,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:00,814 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:01,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3037,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:01,015 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:01,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:01,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1071827879, now seen corresponding path program 319 times [2021-06-05 04:43:01,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:01,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424585682] [2021-06-05 04:43:01,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:01,066 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 04:43:01,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:01,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424585682] [2021-06-05 04:43:01,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424585682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:01,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640881959] [2021-06-05 04:43:01,067 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 04:43:01,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:01,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:01,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:01,250 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 04:43:01,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640881959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:01,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:01,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:01,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25438679] [2021-06-05 04:43:01,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:01,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:01,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:01,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:01,250 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 04:43:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:01,383 INFO L93 Difference]: Finished difference Result 359 states and 1055 transitions. [2021-06-05 04:43:01,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:01,383 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 04:43:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:01,384 INFO L225 Difference]: With dead ends: 359 [2021-06-05 04:43:01,384 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 04:43:01,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 04:43:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 310. [2021-06-05 04:43:01,387 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 04:43:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 925 transitions. [2021-06-05 04:43:01,387 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 925 transitions. Word has length 20 [2021-06-05 04:43:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:01,387 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 925 transitions. [2021-06-05 04:43:01,387 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 04:43:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 925 transitions. [2021-06-05 04:43:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:01,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:01,388 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:01,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:01,588 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:01,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:01,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1623389951, now seen corresponding path program 320 times [2021-06-05 04:43:01,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:01,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940975976] [2021-06-05 04:43:01,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:01,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:01,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940975976] [2021-06-05 04:43:01,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940975976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:01,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965439001] [2021-06-05 04:43:01,640 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 04:43:01,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:01,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:01,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:01,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:01,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965439001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:01,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:01,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:01,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392969844] [2021-06-05 04:43:01,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:01,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:01,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:01,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:01,794 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 04:43:01,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:01,916 INFO L93 Difference]: Finished difference Result 329 states and 966 transitions. [2021-06-05 04:43:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:01,916 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 04:43:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:01,917 INFO L225 Difference]: With dead ends: 329 [2021-06-05 04:43:01,917 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 04:43:01,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:43:01,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 04:43:01,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 314. [2021-06-05 04:43:01,919 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 04:43:01,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 935 transitions. [2021-06-05 04:43:01,920 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 935 transitions. Word has length 20 [2021-06-05 04:43:01,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:01,920 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 935 transitions. [2021-06-05 04:43:01,920 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 04:43:01,920 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 935 transitions. [2021-06-05 04:43:01,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:01,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:01,920 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 04:43:02,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-06-05 04:43:02,121 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:02,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:02,121 INFO L82 PathProgramCache]: Analyzing trace with hash -871989513, now seen corresponding path program 321 times [2021-06-05 04:43:02,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:02,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416905107] [2021-06-05 04:43:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:02,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:02,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:02,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416905107] [2021-06-05 04:43:02,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416905107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:02,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595769234] [2021-06-05 04:43:02,166 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 04:43:02,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:43:02,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:02,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:02,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:02,315 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 04:43:02,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595769234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:02,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:02,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:02,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920901256] [2021-06-05 04:43:02,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:02,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:02,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:02,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:02,316 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 04:43:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:02,453 INFO L93 Difference]: Finished difference Result 354 states and 1018 transitions. [2021-06-05 04:43:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:02,454 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 04:43:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:02,454 INFO L225 Difference]: With dead ends: 354 [2021-06-05 04:43:02,454 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 04:43:02,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 04:43:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 324. [2021-06-05 04:43:02,457 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 04:43:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 962 transitions. [2021-06-05 04:43:02,457 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 962 transitions. Word has length 20 [2021-06-05 04:43:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:02,457 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 962 transitions. [2021-06-05 04:43:02,457 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 04:43:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 962 transitions. [2021-06-05 04:43:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:02,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:02,458 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 04:43:02,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-06-05 04:43:02,658 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:02,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1507553857, now seen corresponding path program 322 times [2021-06-05 04:43:02,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:02,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327013851] [2021-06-05 04:43:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:02,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:02,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327013851] [2021-06-05 04:43:02,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327013851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:02,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052422212] [2021-06-05 04:43:02,705 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 04:43:02,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:02,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:02,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:02,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:02,853 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 04:43:02,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052422212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:02,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:02,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:02,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296308013] [2021-06-05 04:43:02,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:02,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:02,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:02,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:02,854 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 04:43:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:02,965 INFO L93 Difference]: Finished difference Result 325 states and 964 transitions. [2021-06-05 04:43:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:02,965 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 04:43:02,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:02,966 INFO L225 Difference]: With dead ends: 325 [2021-06-05 04:43:02,966 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 04:43:02,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:02,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 04:43:02,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 312. [2021-06-05 04:43:02,968 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 04:43:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 930 transitions. [2021-06-05 04:43:02,969 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 930 transitions. Word has length 20 [2021-06-05 04:43:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:02,969 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 930 transitions. [2021-06-05 04:43:02,969 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 04:43:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 930 transitions. [2021-06-05 04:43:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:02,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:02,969 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 04:43:03,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:03,170 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:03,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:03,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1310549153, now seen corresponding path program 323 times [2021-06-05 04:43:03,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:03,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219195565] [2021-06-05 04:43:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:03,226 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 04:43:03,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:03,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219195565] [2021-06-05 04:43:03,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219195565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:03,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955652859] [2021-06-05 04:43:03,227 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 04:43:03,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:43:03,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:03,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:03,373 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 04:43:03,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955652859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:03,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:03,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:03,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423314546] [2021-06-05 04:43:03,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:03,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:03,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:03,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:03,374 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 04:43:03,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:03,517 INFO L93 Difference]: Finished difference Result 360 states and 1033 transitions. [2021-06-05 04:43:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:03,517 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 04:43:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:03,517 INFO L225 Difference]: With dead ends: 360 [2021-06-05 04:43:03,517 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 04:43:03,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:43:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 04:43:03,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 326. [2021-06-05 04:43:03,520 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 04:43:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 969 transitions. [2021-06-05 04:43:03,521 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 969 transitions. Word has length 20 [2021-06-05 04:43:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:03,521 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 969 transitions. [2021-06-05 04:43:03,521 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 04:43:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 969 transitions. [2021-06-05 04:43:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:03,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:03,521 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:03,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3073 [2021-06-05 04:43:03,722 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:03,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:03,722 INFO L82 PathProgramCache]: Analyzing trace with hash -604874773, now seen corresponding path program 324 times [2021-06-05 04:43:03,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:03,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358720338] [2021-06-05 04:43:03,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:03,768 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 04:43:03,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:03,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358720338] [2021-06-05 04:43:03,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358720338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:03,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318844713] [2021-06-05 04:43:03,768 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 04:43:03,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:43:03,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:03,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:03,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:03,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318844713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:03,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:03,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:03,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384950060] [2021-06-05 04:43:03,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:03,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:03,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:03,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:03,909 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 04:43:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:04,044 INFO L93 Difference]: Finished difference Result 360 states and 1039 transitions. [2021-06-05 04:43:04,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:43:04,044 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 04:43:04,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:04,045 INFO L225 Difference]: With dead ends: 360 [2021-06-05 04:43:04,045 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 04:43:04,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:43:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 04:43:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 324. [2021-06-05 04:43:04,047 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 04:43:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 964 transitions. [2021-06-05 04:43:04,048 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 964 transitions. Word has length 20 [2021-06-05 04:43:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:04,048 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 964 transitions. [2021-06-05 04:43:04,048 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 04:43:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 964 transitions. [2021-06-05 04:43:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:04,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:04,048 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 04:43:04,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-06-05 04:43:04,249 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:04,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:04,249 INFO L82 PathProgramCache]: Analyzing trace with hash 435361025, now seen corresponding path program 325 times [2021-06-05 04:43:04,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:04,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502422567] [2021-06-05 04:43:04,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:04,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:04,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502422567] [2021-06-05 04:43:04,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502422567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:04,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768023684] [2021-06-05 04:43:04,296 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 04:43:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:04,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:04,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:04,433 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 04:43:04,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768023684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:04,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:04,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:04,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068331370] [2021-06-05 04:43:04,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:04,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:04,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:04,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:04,434 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 04:43:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:04,552 INFO L93 Difference]: Finished difference Result 335 states and 989 transitions. [2021-06-05 04:43:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:04,552 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 04:43:04,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:04,553 INFO L225 Difference]: With dead ends: 335 [2021-06-05 04:43:04,553 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 04:43:04,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:04,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 04:43:04,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 307. [2021-06-05 04:43:04,555 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 04:43:04,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 915 transitions. [2021-06-05 04:43:04,556 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 915 transitions. Word has length 20 [2021-06-05 04:43:04,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:04,556 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 915 transitions. [2021-06-05 04:43:04,556 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 04:43:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 915 transitions. [2021-06-05 04:43:04,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:04,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:04,556 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 04:43:04,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3084,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:04,757 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:04,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2107033044, now seen corresponding path program 326 times [2021-06-05 04:43:04,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:04,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106999303] [2021-06-05 04:43:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:04,806 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 04:43:04,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:04,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106999303] [2021-06-05 04:43:04,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106999303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:04,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773654488] [2021-06-05 04:43:04,807 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 04:43:04,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:04,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:04,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:04,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:04,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:04,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:04,992 INFO L628 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2021-06-05 04:43:04,995 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 13 treesize of output 9 [2021-06-05 04:43:04,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:04,997 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 12 treesize of output 8 [2021-06-05 04:43:04,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:05,017 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:43:05,017 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:43:05,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:05,018 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:85, output treesize:20 [2021-06-05 04:43:05,078 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 04:43:05,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773654488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:05,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:05,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:43:05,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546941748] [2021-06-05 04:43:05,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:05,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:05,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:05,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:05,079 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 04:43:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:05,497 INFO L93 Difference]: Finished difference Result 377 states and 1078 transitions. [2021-06-05 04:43:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:05,497 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 04:43:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:05,497 INFO L225 Difference]: With dead ends: 377 [2021-06-05 04:43:05,497 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 04:43:05,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:43:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 04:43:05,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 284. [2021-06-05 04:43:05,500 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 04:43:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 836 transitions. [2021-06-05 04:43:05,500 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 836 transitions. Word has length 20 [2021-06-05 04:43:05,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:05,501 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 836 transitions. [2021-06-05 04:43:05,501 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 04:43:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 836 transitions. [2021-06-05 04:43:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:05,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:05,501 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 04:43:05,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-06-05 04:43:05,701 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:05,702 INFO L82 PathProgramCache]: Analyzing trace with hash 6577655, now seen corresponding path program 327 times [2021-06-05 04:43:05,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:05,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419707581] [2021-06-05 04:43:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:05,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:05,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419707581] [2021-06-05 04:43:05,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419707581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:05,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936985285] [2021-06-05 04:43:05,751 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 04:43:05,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:43:05,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:05,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:05,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:05,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:05,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:05,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:05,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:05,894 INFO L628 ElimStorePlain]: treesize reduction 2, result has 94.7 percent of original size [2021-06-05 04:43:05,896 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 04:43:05,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:05,914 INFO L628 ElimStorePlain]: treesize reduction 11, result has 64.5 percent of original size [2021-06-05 04:43:05,914 INFO L518 ElimStorePlain]: Eliminatee v_prenex_116 vanished before elimination [2021-06-05 04:43:05,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:05,915 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 04:43:05,951 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 04:43:05,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936985285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:05,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:05,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:05,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096941408] [2021-06-05 04:43:05,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:05,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:05,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:05,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:05,951 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 04:43:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:06,139 INFO L93 Difference]: Finished difference Result 438 states and 1259 transitions. [2021-06-05 04:43:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:06,139 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 04:43:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:06,140 INFO L225 Difference]: With dead ends: 438 [2021-06-05 04:43:06,140 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 04:43:06,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 04:43:06,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 298. [2021-06-05 04:43:06,143 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 04:43:06,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 04:43:06,143 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 04:43:06,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:06,143 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 04:43:06,143 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 04:43:06,143 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 04:43:06,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:06,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:06,144 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 04:43:06,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3099 [2021-06-05 04:43:06,344 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:06,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:06,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1165221185, now seen corresponding path program 328 times [2021-06-05 04:43:06,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:06,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621897437] [2021-06-05 04:43:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:06,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:06,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621897437] [2021-06-05 04:43:06,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621897437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:06,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924826763] [2021-06-05 04:43:06,399 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 04:43:06,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:06,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:06,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:06,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:06,514 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 6 treesize of output 4 [2021-06-05 04:43:06,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:06,544 INFO L628 ElimStorePlain]: treesize reduction 23, result has 63.5 percent of original size [2021-06-05 04:43:06,546 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 13 treesize of output 9 [2021-06-05 04:43:06,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:06,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:06,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:06,565 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:43:06,565 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:43:06,565 INFO L518 ElimStorePlain]: Eliminatee v_prenex_117 vanished before elimination [2021-06-05 04:43:06,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:06,566 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 04:43:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:06,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924826763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:06,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:06,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:06,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707539553] [2021-06-05 04:43:06,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:06,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:06,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:06,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:06,607 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 04:43:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:06,934 INFO L93 Difference]: Finished difference Result 490 states and 1380 transitions. [2021-06-05 04:43:06,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:06,935 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 04:43:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:06,935 INFO L225 Difference]: With dead ends: 490 [2021-06-05 04:43:06,935 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 04:43:06,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 04:43:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 304. [2021-06-05 04:43:06,938 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 04:43:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-06-05 04:43:06,939 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-06-05 04:43:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:06,939 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-06-05 04:43:06,939 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 04:43:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-06-05 04:43:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:06,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:06,939 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 04:43:07,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3109 [2021-06-05 04:43:07,140 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:07,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:07,140 INFO L82 PathProgramCache]: Analyzing trace with hash -328686537, now seen corresponding path program 329 times [2021-06-05 04:43:07,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:07,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793454209] [2021-06-05 04:43:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:07,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:07,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793454209] [2021-06-05 04:43:07,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793454209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:07,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282182648] [2021-06-05 04:43:07,189 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 04:43:07,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:43:07,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:07,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:07,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:07,311 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 5 treesize of output 3 [2021-06-05 04:43:07,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:07,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:07,332 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 04:43:07,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:07,361 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 04:43:07,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:07,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:07,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:07,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:07,382 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:43:07,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:07,383 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 04:43:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:07,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282182648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:07,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:07,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:07,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29838686] [2021-06-05 04:43:07,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:07,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:07,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:07,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:07,423 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 04:43:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:07,633 INFO L93 Difference]: Finished difference Result 447 states and 1271 transitions. [2021-06-05 04:43:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:07,634 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 04:43:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:07,634 INFO L225 Difference]: With dead ends: 447 [2021-06-05 04:43:07,634 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 04:43:07,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 04:43:07,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 302. [2021-06-05 04:43:07,637 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 04:43:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-06-05 04:43:07,638 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-06-05 04:43:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:07,638 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-06-05 04:43:07,638 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 04:43:07,638 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-06-05 04:43:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:07,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:07,638 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 04:43:07,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3120 [2021-06-05 04:43:07,839 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:07,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1825154753, now seen corresponding path program 330 times [2021-06-05 04:43:07,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:07,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647913727] [2021-06-05 04:43:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:07,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:07,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647913727] [2021-06-05 04:43:07,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647913727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:07,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993861859] [2021-06-05 04:43:07,895 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 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 04:43:07,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:43:07,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:07,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:07,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:08,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:08,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:08,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:08,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:08,029 INFO L628 ElimStorePlain]: treesize reduction 12, result has 69.2 percent of original size [2021-06-05 04:43:08,030 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 12 treesize of output 8 [2021-06-05 04:43:08,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:08,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:08,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:08,040 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:43:08,087 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 04:43:08,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993861859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:08,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:08,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:08,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998153397] [2021-06-05 04:43:08,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:08,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:08,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:08,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:08,088 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 04:43:08,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:08,347 INFO L93 Difference]: Finished difference Result 550 states and 1569 transitions. [2021-06-05 04:43:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:08,347 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 04:43:08,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:08,348 INFO L225 Difference]: With dead ends: 550 [2021-06-05 04:43:08,348 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 04:43:08,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 207.4ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:08,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 04:43:08,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 308. [2021-06-05 04:43:08,351 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 04:43:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 923 transitions. [2021-06-05 04:43:08,352 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 923 transitions. Word has length 20 [2021-06-05 04:43:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:08,352 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 923 transitions. [2021-06-05 04:43:08,352 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 04:43:08,352 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 923 transitions. [2021-06-05 04:43:08,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:08,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:08,352 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:08,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3132 [2021-06-05 04:43:08,553 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:08,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:08,553 INFO L82 PathProgramCache]: Analyzing trace with hash -836761151, now seen corresponding path program 331 times [2021-06-05 04:43:08,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:08,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103009857] [2021-06-05 04:43:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:08,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:08,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:08,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103009857] [2021-06-05 04:43:08,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103009857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:08,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422606229] [2021-06-05 04:43:08,606 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 04:43:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:08,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:08,721 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 5 treesize of output 3 [2021-06-05 04:43:08,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:08,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:08,742 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 04:43:08,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:08,771 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 04:43:08,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:08,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:08,775 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 13 treesize of output 9 [2021-06-05 04:43:08,776 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:08,792 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:43:08,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:08,793 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 04:43:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:08,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422606229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:08,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:08,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:08,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55333497] [2021-06-05 04:43:08,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:08,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:08,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:08,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:08,838 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 04:43:09,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:09,038 INFO L93 Difference]: Finished difference Result 517 states and 1487 transitions. [2021-06-05 04:43:09,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:09,038 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 04:43:09,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:09,039 INFO L225 Difference]: With dead ends: 517 [2021-06-05 04:43:09,039 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 04:43:09,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 04:43:09,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-06-05 04:43:09,042 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 04:43:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 938 transitions. [2021-06-05 04:43:09,042 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 938 transitions. Word has length 20 [2021-06-05 04:43:09,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:09,042 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 938 transitions. [2021-06-05 04:43:09,042 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 04:43:09,042 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 938 transitions. [2021-06-05 04:43:09,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:09,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:09,043 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:09,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3142,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:09,243 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:09,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:09,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1501069189, now seen corresponding path program 332 times [2021-06-05 04:43:09,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:09,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241899537] [2021-06-05 04:43:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:09,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:09,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241899537] [2021-06-05 04:43:09,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241899537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:09,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371985530] [2021-06-05 04:43:09,297 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 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 04:43:09,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:09,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:09,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:09,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:09,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:09,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:09,450 INFO L628 ElimStorePlain]: treesize reduction 13, result has 80.0 percent of original size [2021-06-05 04:43:09,450 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:43:09,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:09,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:09,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:09,471 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 13 treesize of output 9 [2021-06-05 04:43:09,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:09,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:43:09,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:09,491 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 04:43:09,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:09,491 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:71, output treesize:20 [2021-06-05 04:43:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:09,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371985530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:09,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:09,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:09,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332148732] [2021-06-05 04:43:09,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:09,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:09,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:09,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:09,534 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 04:43:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:09,728 INFO L93 Difference]: Finished difference Result 484 states and 1410 transitions. [2021-06-05 04:43:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:09,728 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 04:43:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:09,729 INFO L225 Difference]: With dead ends: 484 [2021-06-05 04:43:09,729 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 04:43:09,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 04:43:09,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 302. [2021-06-05 04:43:09,732 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 04:43:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-06-05 04:43:09,732 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-06-05 04:43:09,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:09,732 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-06-05 04:43:09,732 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 04:43:09,732 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-06-05 04:43:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:09,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:09,733 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:09,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3153 [2021-06-05 04:43:09,933 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:09,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1504948017, now seen corresponding path program 333 times [2021-06-05 04:43:09,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:09,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705796468] [2021-06-05 04:43:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:09,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:09,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705796468] [2021-06-05 04:43:09,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705796468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:09,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955165106] [2021-06-05 04:43:09,990 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 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 04:43:10,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:43:10,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:10,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:10,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:10,115 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 04:43:10,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:10,145 INFO L628 ElimStorePlain]: treesize reduction 11, result has 78.4 percent of original size [2021-06-05 04:43:10,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:10,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:10,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:10,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:10,169 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:43:10,169 INFO L518 ElimStorePlain]: Eliminatee v_prenex_128 vanished before elimination [2021-06-05 04:43:10,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:10,169 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:57, output treesize:20 [2021-06-05 04:43:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:10,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955165106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:10,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:10,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:10,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892601149] [2021-06-05 04:43:10,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:10,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:10,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:10,242 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 04:43:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:10,620 INFO L93 Difference]: Finished difference Result 615 states and 1694 transitions. [2021-06-05 04:43:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:10,621 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 04:43:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:10,621 INFO L225 Difference]: With dead ends: 615 [2021-06-05 04:43:10,621 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 04:43:10,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:10,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 04:43:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 310. [2021-06-05 04:43:10,625 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 04:43:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 935 transitions. [2021-06-05 04:43:10,625 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 935 transitions. Word has length 20 [2021-06-05 04:43:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:10,625 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 935 transitions. [2021-06-05 04:43:10,625 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 04:43:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 935 transitions. [2021-06-05 04:43:10,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:10,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:10,626 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:10,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3162,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:10,826 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:10,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:10,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1296111557, now seen corresponding path program 334 times [2021-06-05 04:43:10,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:10,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585308724] [2021-06-05 04:43:10,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:10,886 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 04:43:10,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:10,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585308724] [2021-06-05 04:43:10,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585308724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:10,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55224522] [2021-06-05 04:43:10,886 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 04:43:10,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:10,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:10,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:10,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:11,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:11,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:11,041 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 04:43:11,043 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 6 treesize of output 4 [2021-06-05 04:43:11,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:11,073 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 04:43:11,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:11,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:11,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:11,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:11,094 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:43:11,094 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:43:11,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:11,095 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 04:43:11,163 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 04:43:11,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55224522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:11,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:11,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:11,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104848016] [2021-06-05 04:43:11,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:11,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:11,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:11,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:11,164 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 04:43:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:11,394 INFO L93 Difference]: Finished difference Result 549 states and 1540 transitions. [2021-06-05 04:43:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:11,395 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 04:43:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:11,395 INFO L225 Difference]: With dead ends: 549 [2021-06-05 04:43:11,395 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 04:43:11,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 04:43:11,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 304. [2021-06-05 04:43:11,399 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 04:43:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-06-05 04:43:11,399 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-06-05 04:43:11,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:11,399 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-06-05 04:43:11,399 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 04:43:11,399 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-06-05 04:43:11,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:11,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:11,400 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 04:43:11,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3173 [2021-06-05 04:43:11,600 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:11,600 INFO L82 PathProgramCache]: Analyzing trace with hash -753547579, now seen corresponding path program 335 times [2021-06-05 04:43:11,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:11,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265480535] [2021-06-05 04:43:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:11,656 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 04:43:11,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:11,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265480535] [2021-06-05 04:43:11,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265480535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:11,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581372594] [2021-06-05 04:43:11,657 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 04:43:11,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:43:11,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:11,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:11,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:11,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:11,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:11,810 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 04:43:11,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:11,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:11,840 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 04:43:11,841 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 04:43:11,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:11,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:11,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:11,860 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:43:11,860 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:43:11,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:11,861 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 04:43:11,933 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 04:43:11,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581372594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:11,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:11,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:11,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256268079] [2021-06-05 04:43:11,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:11,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:11,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:11,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:11,934 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 04:43:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:12,175 INFO L93 Difference]: Finished difference Result 574 states and 1629 transitions. [2021-06-05 04:43:12,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:12,175 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 04:43:12,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:12,176 INFO L225 Difference]: With dead ends: 574 [2021-06-05 04:43:12,176 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 04:43:12,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 04:43:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 307. [2021-06-05 04:43:12,180 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 04:43:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 925 transitions. [2021-06-05 04:43:12,180 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 925 transitions. Word has length 20 [2021-06-05 04:43:12,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:12,180 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 925 transitions. [2021-06-05 04:43:12,180 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 04:43:12,180 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 925 transitions. [2021-06-05 04:43:12,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:12,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:12,181 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:12,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3184 [2021-06-05 04:43:12,381 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:12,381 INFO L82 PathProgramCache]: Analyzing trace with hash 538794821, now seen corresponding path program 336 times [2021-06-05 04:43:12,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:12,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057434506] [2021-06-05 04:43:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:12,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:12,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057434506] [2021-06-05 04:43:12,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057434506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:12,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993287719] [2021-06-05 04:43:12,443 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 04:43:12,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:43:12,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:12,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:12,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:12,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:12,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:12,600 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 04:43:12,602 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 12 treesize of output 8 [2021-06-05 04:43:12,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:12,604 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 04:43:12,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:12,624 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 04:43:12,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-05 04:43:12,624 INFO L518 ElimStorePlain]: Eliminatee v_prenex_138 vanished before elimination [2021-06-05 04:43:12,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:12,624 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 04:43:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:12,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993287719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:12,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:12,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:12,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487831239] [2021-06-05 04:43:12,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:12,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:12,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:12,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:12,702 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 04:43:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:12,913 INFO L93 Difference]: Finished difference Result 543 states and 1562 transitions. [2021-06-05 04:43:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:12,914 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 04:43:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:12,914 INFO L225 Difference]: With dead ends: 543 [2021-06-05 04:43:12,914 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 04:43:12,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 04:43:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 304. [2021-06-05 04:43:12,918 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 04:43:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 910 transitions. [2021-06-05 04:43:12,918 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 910 transitions. Word has length 20 [2021-06-05 04:43:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:12,918 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 910 transitions. [2021-06-05 04:43:12,918 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 04:43:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 910 transitions. [2021-06-05 04:43:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:12,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:12,919 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 04:43:13,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3196 [2021-06-05 04:43:13,119 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:13,119 INFO L82 PathProgramCache]: Analyzing trace with hash -732811051, now seen corresponding path program 337 times [2021-06-05 04:43:13,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:13,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959286343] [2021-06-05 04:43:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:13,171 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 04:43:13,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:13,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959286343] [2021-06-05 04:43:13,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959286343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:13,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634754022] [2021-06-05 04:43:13,172 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 04:43:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:13,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:13,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:13,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:13,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:13,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:13,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:13,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:43:13,302 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 13 treesize of output 9 [2021-06-05 04:43:13,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:13,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:43:13,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:13,322 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 04:43:13,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:13,323 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 04:43:13,393 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 04:43:13,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634754022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:13,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:13,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:13,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549599243] [2021-06-05 04:43:13,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:13,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:13,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:13,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:13,393 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 04:43:13,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:13,599 INFO L93 Difference]: Finished difference Result 497 states and 1409 transitions. [2021-06-05 04:43:13,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:13,600 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 04:43:13,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:13,600 INFO L225 Difference]: With dead ends: 497 [2021-06-05 04:43:13,600 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 04:43:13,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 04:43:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 308. [2021-06-05 04:43:13,603 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 04:43:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2021-06-05 04:43:13,604 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2021-06-05 04:43:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:13,604 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2021-06-05 04:43:13,604 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 04:43:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2021-06-05 04:43:13,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:13,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:13,604 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:13,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3206 [2021-06-05 04:43:13,805 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:13,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1646732319, now seen corresponding path program 338 times [2021-06-05 04:43:13,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:13,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574454815] [2021-06-05 04:43:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:13,859 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 04:43:13,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:13,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574454815] [2021-06-05 04:43:13,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574454815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:13,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909500059] [2021-06-05 04:43:13,859 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 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 04:43:13,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:13,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:13,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:13,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:14,009 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 6 treesize of output 4 [2021-06-05 04:43:14,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:14,063 INFO L628 ElimStorePlain]: treesize reduction 11, result has 82.5 percent of original size [2021-06-05 04:43:14,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:14,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:14,094 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-05 04:43:14,094 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-06-05 04:43:14,096 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 12 treesize of output 8 [2021-06-05 04:43:14,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:14,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:14,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:14,115 INFO L628 ElimStorePlain]: treesize reduction 1, result has 95.2 percent of original size [2021-06-05 04:43:14,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:43:14,116 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:69, output treesize:20 [2021-06-05 04:43:14,184 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 04:43:14,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909500059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:14,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:14,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:14,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447722978] [2021-06-05 04:43:14,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:14,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:14,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:14,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:14,185 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 04:43:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:14,458 INFO L93 Difference]: Finished difference Result 503 states and 1430 transitions. [2021-06-05 04:43:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:43:14,458 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 04:43:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:14,459 INFO L225 Difference]: With dead ends: 503 [2021-06-05 04:43:14,459 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 04:43:14,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 04:43:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 303. [2021-06-05 04:43:14,462 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 04:43:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 906 transitions. [2021-06-05 04:43:14,463 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 906 transitions. Word has length 20 [2021-06-05 04:43:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:14,463 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 906 transitions. [2021-06-05 04:43:14,463 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 04:43:14,463 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 906 transitions. [2021-06-05 04:43:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:14,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:14,463 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:14,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3216,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:14,663 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:14,664 INFO L82 PathProgramCache]: Analyzing trace with hash 764376663, now seen corresponding path program 339 times [2021-06-05 04:43:14,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:14,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777369543] [2021-06-05 04:43:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:14,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:14,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777369543] [2021-06-05 04:43:14,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777369543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:14,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699552295] [2021-06-05 04:43:14,714 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 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 04:43:14,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:43:14,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:14,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:14,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:14,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:14,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:14,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:14,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:14,849 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:43:14,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:14,849 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:43:14,881 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 04:43:14,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699552295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:14,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:14,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:14,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244971226] [2021-06-05 04:43:14,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:14,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:14,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:14,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:14,882 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 04:43:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:15,053 INFO L93 Difference]: Finished difference Result 467 states and 1384 transitions. [2021-06-05 04:43:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:15,053 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 04:43:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:15,053 INFO L225 Difference]: With dead ends: 467 [2021-06-05 04:43:15,054 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 04:43:15,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 04:43:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 315. [2021-06-05 04:43:15,057 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 04:43:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 948 transitions. [2021-06-05 04:43:15,057 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 948 transitions. Word has length 20 [2021-06-05 04:43:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:15,057 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 948 transitions. [2021-06-05 04:43:15,057 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 04:43:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 948 transitions. [2021-06-05 04:43:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:15,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:15,058 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 04:43:15,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3226,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:15,258 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:15,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1897539241, now seen corresponding path program 340 times [2021-06-05 04:43:15,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:15,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252875237] [2021-06-05 04:43:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:15,314 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 04:43:15,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:15,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252875237] [2021-06-05 04:43:15,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252875237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:15,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400947931] [2021-06-05 04:43:15,314 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 04:43:15,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:15,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:15,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:15,431 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 12 treesize of output 8 [2021-06-05 04:43:15,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:15,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:15,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:15,446 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:43:15,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:15,446 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:43:15,495 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 04:43:15,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400947931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:15,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:15,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:15,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114198744] [2021-06-05 04:43:15,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:15,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:15,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:15,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:15,496 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 04:43:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:15,715 INFO L93 Difference]: Finished difference Result 471 states and 1376 transitions. [2021-06-05 04:43:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:15,715 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 04:43:15,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:15,716 INFO L225 Difference]: With dead ends: 471 [2021-06-05 04:43:15,716 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 04:43:15,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 04:43:15,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 318. [2021-06-05 04:43:15,719 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 04:43:15,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 963 transitions. [2021-06-05 04:43:15,720 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 963 transitions. Word has length 20 [2021-06-05 04:43:15,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:15,720 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 963 transitions. [2021-06-05 04:43:15,720 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 04:43:15,720 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 963 transitions. [2021-06-05 04:43:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:15,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:15,720 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:15,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:15,921 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:15,921 INFO L82 PathProgramCache]: Analyzing trace with hash 440291099, now seen corresponding path program 341 times [2021-06-05 04:43:15,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:15,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613293935] [2021-06-05 04:43:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:15,970 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 04:43:15,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:15,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613293935] [2021-06-05 04:43:15,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613293935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:15,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895798143] [2021-06-05 04:43:15,971 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 04:43:16,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:16,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:16,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:16,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:16,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:16,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:16,103 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:43:16,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:16,104 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:43:16,151 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 04:43:16,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895798143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:16,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:16,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:16,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651719882] [2021-06-05 04:43:16,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:16,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:16,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:16,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:16,152 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 04:43:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:16,357 INFO L93 Difference]: Finished difference Result 428 states and 1279 transitions. [2021-06-05 04:43:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:16,358 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 04:43:16,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:16,358 INFO L225 Difference]: With dead ends: 428 [2021-06-05 04:43:16,358 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 04:43:16,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:16,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 04:43:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 309. [2021-06-05 04:43:16,361 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 04:43:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-06-05 04:43:16,362 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-06-05 04:43:16,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:16,362 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-06-05 04:43:16,362 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 04:43:16,362 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-06-05 04:43:16,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:16,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:16,362 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:16,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3241,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:16,562 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:16,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:16,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1060624641, now seen corresponding path program 342 times [2021-06-05 04:43:16,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:16,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26636846] [2021-06-05 04:43:16,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:16,617 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 04:43:16,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:16,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26636846] [2021-06-05 04:43:16,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26636846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:16,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065211643] [2021-06-05 04:43:16,617 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 04:43:16,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:43:16,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:16,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:16,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:16,772 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 04:43:16,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065211643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:16,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:16,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:16,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799374437] [2021-06-05 04:43:16,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:16,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:16,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:16,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:16,773 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 04:43:16,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:16,962 INFO L93 Difference]: Finished difference Result 381 states and 1121 transitions. [2021-06-05 04:43:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:16,963 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 04:43:16,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:16,963 INFO L225 Difference]: With dead ends: 381 [2021-06-05 04:43:16,963 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 04:43:16,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 04:43:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 315. [2021-06-05 04:43:16,966 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 04:43:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 951 transitions. [2021-06-05 04:43:16,966 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 951 transitions. Word has length 20 [2021-06-05 04:43:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:16,967 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 951 transitions. [2021-06-05 04:43:16,967 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 04:43:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 951 transitions. [2021-06-05 04:43:16,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:16,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:16,967 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 04:43:17,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3247 [2021-06-05 04:43:17,167 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:17,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:17,168 INFO L82 PathProgramCache]: Analyzing trace with hash -896512315, now seen corresponding path program 343 times [2021-06-05 04:43:17,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:17,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609933255] [2021-06-05 04:43:17,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:17,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:17,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609933255] [2021-06-05 04:43:17,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609933255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:17,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280524637] [2021-06-05 04:43:17,224 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 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 04:43:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:17,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:17,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280524637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:17,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:17,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:17,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281422089] [2021-06-05 04:43:17,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:17,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:17,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:17,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:17,375 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 04:43:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:17,591 INFO L93 Difference]: Finished difference Result 387 states and 1136 transitions. [2021-06-05 04:43:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:43:17,591 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 04:43:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:17,592 INFO L225 Difference]: With dead ends: 387 [2021-06-05 04:43:17,592 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 04:43:17,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 04:43:17,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 312. [2021-06-05 04:43:17,595 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 04:43:17,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 936 transitions. [2021-06-05 04:43:17,595 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 936 transitions. Word has length 20 [2021-06-05 04:43:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:17,595 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 936 transitions. [2021-06-05 04:43:17,595 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 04:43:17,595 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 936 transitions. [2021-06-05 04:43:17,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:17,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:17,596 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:17,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3252 [2021-06-05 04:43:17,796 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:17,796 INFO L82 PathProgramCache]: Analyzing trace with hash -893886539, now seen corresponding path program 344 times [2021-06-05 04:43:17,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:17,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729582250] [2021-06-05 04:43:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:17,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:17,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729582250] [2021-06-05 04:43:17,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729582250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:17,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645575827] [2021-06-05 04:43:17,849 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 04:43:17,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:17,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:17,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:17,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645575827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:17,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:17,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:17,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631155960] [2021-06-05 04:43:17,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:17,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:17,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:17,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:17,996 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 04:43:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:18,178 INFO L93 Difference]: Finished difference Result 345 states and 1029 transitions. [2021-06-05 04:43:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:18,178 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 04:43:18,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:18,179 INFO L225 Difference]: With dead ends: 345 [2021-06-05 04:43:18,179 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 04:43:18,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 04:43:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 303. [2021-06-05 04:43:18,181 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 04:43:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 906 transitions. [2021-06-05 04:43:18,182 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 906 transitions. Word has length 20 [2021-06-05 04:43:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:18,182 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 906 transitions. [2021-06-05 04:43:18,182 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 04:43:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 906 transitions. [2021-06-05 04:43:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:18,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:18,182 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 04:43:18,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3258,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:18,383 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:18,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1304929953, now seen corresponding path program 345 times [2021-06-05 04:43:18,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:18,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281216457] [2021-06-05 04:43:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:18,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:18,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281216457] [2021-06-05 04:43:18,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281216457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:18,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141930040] [2021-06-05 04:43:18,451 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 04:43:18,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:43:18,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:18,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:18,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:18,617 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 04:43:18,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141930040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:18,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:18,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:18,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197556653] [2021-06-05 04:43:18,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:18,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:18,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:18,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:18,618 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 04:43:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:18,908 INFO L93 Difference]: Finished difference Result 510 states and 1432 transitions. [2021-06-05 04:43:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:18,908 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 04:43:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:18,909 INFO L225 Difference]: With dead ends: 510 [2021-06-05 04:43:18,909 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 04:43:18,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:18,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 04:43:18,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 313. [2021-06-05 04:43:18,912 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 04:43:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 951 transitions. [2021-06-05 04:43:18,913 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 951 transitions. Word has length 20 [2021-06-05 04:43:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:18,913 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 951 transitions. [2021-06-05 04:43:18,913 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 04:43:18,913 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 951 transitions. [2021-06-05 04:43:18,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:18,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:18,913 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:19,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:19,114 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:19,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:19,114 INFO L82 PathProgramCache]: Analyzing trace with hash -188977769, now seen corresponding path program 346 times [2021-06-05 04:43:19,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:19,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637398300] [2021-06-05 04:43:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:19,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:19,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637398300] [2021-06-05 04:43:19,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637398300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:19,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795961471] [2021-06-05 04:43:19,170 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 04:43:19,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:19,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:19,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:19,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795961471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:19,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:19,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:19,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129768441] [2021-06-05 04:43:19,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:19,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:19,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:19,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:19,329 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 04:43:19,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:19,514 INFO L93 Difference]: Finished difference Result 444 states and 1278 transitions. [2021-06-05 04:43:19,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:19,514 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 04:43:19,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:19,515 INFO L225 Difference]: With dead ends: 444 [2021-06-05 04:43:19,515 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 04:43:19,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:19,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 04:43:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 307. [2021-06-05 04:43:19,518 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 04:43:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-06-05 04:43:19,518 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-06-05 04:43:19,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:19,519 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-06-05 04:43:19,519 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 04:43:19,519 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-06-05 04:43:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:19,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:19,519 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 04:43:19,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3270,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:19,719 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:19,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:19,720 INFO L82 PathProgramCache]: Analyzing trace with hash 2056330391, now seen corresponding path program 347 times [2021-06-05 04:43:19,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:19,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268372677] [2021-06-05 04:43:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:19,775 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 04:43:19,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:19,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268372677] [2021-06-05 04:43:19,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268372677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:19,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62478776] [2021-06-05 04:43:19,775 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 04:43:19,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:43:19,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:19,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:19,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:19,945 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 04:43:19,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62478776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:19,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:19,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:19,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088052615] [2021-06-05 04:43:19,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:19,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:19,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:19,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:19,945 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 04:43:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:20,134 INFO L93 Difference]: Finished difference Result 515 states and 1476 transitions. [2021-06-05 04:43:20,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:20,135 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 04:43:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:20,135 INFO L225 Difference]: With dead ends: 515 [2021-06-05 04:43:20,135 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 04:43:20,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:20,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 04:43:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 310. [2021-06-05 04:43:20,140 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 04:43:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 941 transitions. [2021-06-05 04:43:20,141 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 941 transitions. Word has length 20 [2021-06-05 04:43:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:20,141 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 941 transitions. [2021-06-05 04:43:20,141 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 04:43:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 941 transitions. [2021-06-05 04:43:20,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:20,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:20,141 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 04:43:20,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3279 [2021-06-05 04:43:20,342 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:20,342 INFO L82 PathProgramCache]: Analyzing trace with hash -946294505, now seen corresponding path program 348 times [2021-06-05 04:43:20,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:20,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272644322] [2021-06-05 04:43:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:20,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:20,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272644322] [2021-06-05 04:43:20,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272644322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:20,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42488396] [2021-06-05 04:43:20,402 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 04:43:20,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:43:20,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:20,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:20,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:20,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42488396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:20,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:20,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:20,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764349298] [2021-06-05 04:43:20,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:20,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:20,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:20,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:20,569 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 04:43:20,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:20,761 INFO L93 Difference]: Finished difference Result 484 states and 1409 transitions. [2021-06-05 04:43:20,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:20,761 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 04:43:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:20,762 INFO L225 Difference]: With dead ends: 484 [2021-06-05 04:43:20,762 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 04:43:20,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 04:43:20,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 307. [2021-06-05 04:43:20,765 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 04:43:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-06-05 04:43:20,765 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-06-05 04:43:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:20,766 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-06-05 04:43:20,766 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 04:43:20,766 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-06-05 04:43:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:20,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:20,766 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 04:43:20,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-06-05 04:43:20,966 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:20,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:20,967 INFO L82 PathProgramCache]: Analyzing trace with hash 2077066919, now seen corresponding path program 349 times [2021-06-05 04:43:20,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:20,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577261983] [2021-06-05 04:43:20,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:21,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:21,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577261983] [2021-06-05 04:43:21,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577261983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:21,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922054108] [2021-06-05 04:43:21,023 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 04:43:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:21,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:21,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:21,180 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 04:43:21,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922054108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:21,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:21,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:21,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291710321] [2021-06-05 04:43:21,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:21,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:21,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:21,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:21,181 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 04:43:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:21,344 INFO L93 Difference]: Finished difference Result 481 states and 1357 transitions. [2021-06-05 04:43:21,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:21,345 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 04:43:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:21,345 INFO L225 Difference]: With dead ends: 481 [2021-06-05 04:43:21,345 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 04:43:21,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 04:43:21,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 311. [2021-06-05 04:43:21,349 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 04:43:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 940 transitions. [2021-06-05 04:43:21,349 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 940 transitions. Word has length 20 [2021-06-05 04:43:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:21,349 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 940 transitions. [2021-06-05 04:43:21,349 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 04:43:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 940 transitions. [2021-06-05 04:43:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:21,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:21,350 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:21,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3294,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:21,550 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:21,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:21,550 INFO L82 PathProgramCache]: Analyzing trace with hash 161642993, now seen corresponding path program 350 times [2021-06-05 04:43:21,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:21,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064682481] [2021-06-05 04:43:21,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:21,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:21,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064682481] [2021-06-05 04:43:21,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064682481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:21,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016003659] [2021-06-05 04:43:21,614 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 04:43:21,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:21,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:21,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:21,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:21,781 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 04:43:21,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016003659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:21,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:21,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:21,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836636913] [2021-06-05 04:43:21,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:21,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:21,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:21,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:21,782 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 04:43:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:22,026 INFO L93 Difference]: Finished difference Result 487 states and 1378 transitions. [2021-06-05 04:43:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:43:22,026 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 04:43:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:22,026 INFO L225 Difference]: With dead ends: 487 [2021-06-05 04:43:22,027 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 04:43:22,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 238.0ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:22,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 04:43:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 305. [2021-06-05 04:43:22,030 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 04:43:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 915 transitions. [2021-06-05 04:43:22,030 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 915 transitions. Word has length 20 [2021-06-05 04:43:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:22,030 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 915 transitions. [2021-06-05 04:43:22,030 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 04:43:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 915 transitions. [2021-06-05 04:43:22,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:22,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:22,031 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 04:43:22,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:22,231 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:22,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:22,231 INFO L82 PathProgramCache]: Analyzing trace with hash -56098239, now seen corresponding path program 351 times [2021-06-05 04:43:22,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:22,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687760640] [2021-06-05 04:43:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:22,300 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 04:43:22,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:22,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687760640] [2021-06-05 04:43:22,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687760640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:22,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086937575] [2021-06-05 04:43:22,300 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 04:43:22,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:43:22,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:22,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:22,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:22,466 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 04:43:22,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086937575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:22,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:22,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:22,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485562585] [2021-06-05 04:43:22,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:22,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:22,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:22,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:22,467 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 04:43:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:22,670 INFO L93 Difference]: Finished difference Result 429 states and 1262 transitions. [2021-06-05 04:43:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:22,670 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 04:43:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:22,671 INFO L225 Difference]: With dead ends: 429 [2021-06-05 04:43:22,671 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 04:43:22,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:22,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 04:43:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 311. [2021-06-05 04:43:22,674 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 04:43:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 942 transitions. [2021-06-05 04:43:22,674 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 942 transitions. Word has length 20 [2021-06-05 04:43:22,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:22,674 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 942 transitions. [2021-06-05 04:43:22,674 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 04:43:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 942 transitions. [2021-06-05 04:43:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:22,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:22,675 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:22,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:22,875 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:22,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1236244161, now seen corresponding path program 352 times [2021-06-05 04:43:22,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:22,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344055923] [2021-06-05 04:43:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:22,934 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 04:43:22,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:22,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344055923] [2021-06-05 04:43:22,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344055923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:22,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028153795] [2021-06-05 04:43:22,935 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 04:43:23,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:23,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:23,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:23,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:23,099 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 04:43:23,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028153795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:23,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:23,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:23,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157582980] [2021-06-05 04:43:23,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:23,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:23,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:23,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:23,099 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 04:43:23,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:23,278 INFO L93 Difference]: Finished difference Result 423 states and 1244 transitions. [2021-06-05 04:43:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:23,278 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 04:43:23,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:23,279 INFO L225 Difference]: With dead ends: 423 [2021-06-05 04:43:23,279 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 04:43:23,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:23,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 04:43:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 308. [2021-06-05 04:43:23,285 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 04:43:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 927 transitions. [2021-06-05 04:43:23,285 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 927 transitions. Word has length 20 [2021-06-05 04:43:23,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:23,285 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 927 transitions. [2021-06-05 04:43:23,286 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 04:43:23,286 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 927 transitions. [2021-06-05 04:43:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:23,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:23,286 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 04:43:23,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-06-05 04:43:23,486 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:23,487 INFO L82 PathProgramCache]: Analyzing trace with hash -659620875, now seen corresponding path program 353 times [2021-06-05 04:43:23,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:23,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958131665] [2021-06-05 04:43:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:23,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:23,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958131665] [2021-06-05 04:43:23,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958131665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:23,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874609949] [2021-06-05 04:43:23,544 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 04:43:23,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:23,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:23,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:23,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:23,700 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 04:43:23,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874609949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:23,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:23,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:23,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605014651] [2021-06-05 04:43:23,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:23,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:23,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:23,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:23,701 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 04:43:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:23,868 INFO L93 Difference]: Finished difference Result 384 states and 1137 transitions. [2021-06-05 04:43:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:23,869 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 04:43:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:23,869 INFO L225 Difference]: With dead ends: 384 [2021-06-05 04:43:23,869 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 04:43:23,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:23,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 04:43:23,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 305. [2021-06-05 04:43:23,872 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 04:43:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 915 transitions. [2021-06-05 04:43:23,872 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 915 transitions. Word has length 20 [2021-06-05 04:43:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:23,873 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 915 transitions. [2021-06-05 04:43:23,873 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 04:43:23,873 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 915 transitions. [2021-06-05 04:43:23,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:23,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:23,873 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:24,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:24,073 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:24,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:24,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1302818889, now seen corresponding path program 354 times [2021-06-05 04:43:24,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:24,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318353183] [2021-06-05 04:43:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:24,136 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 04:43:24,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:24,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318353183] [2021-06-05 04:43:24,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318353183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:24,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205644951] [2021-06-05 04:43:24,136 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 04:43:24,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:43:24,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:24,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:24,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:24,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205644951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:24,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:24,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:24,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143543875] [2021-06-05 04:43:24,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:24,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:24,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:24,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:24,293 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 04:43:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:24,440 INFO L93 Difference]: Finished difference Result 385 states and 1112 transitions. [2021-06-05 04:43:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:24,440 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 04:43:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:24,440 INFO L225 Difference]: With dead ends: 385 [2021-06-05 04:43:24,440 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 04:43:24,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 04:43:24,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 313. [2021-06-05 04:43:24,443 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 04:43:24,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 941 transitions. [2021-06-05 04:43:24,444 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 941 transitions. Word has length 20 [2021-06-05 04:43:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:24,444 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 941 transitions. [2021-06-05 04:43:24,444 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 04:43:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 941 transitions. [2021-06-05 04:43:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:24,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:24,444 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 04:43:24,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3328 [2021-06-05 04:43:24,645 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:24,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1076724481, now seen corresponding path program 355 times [2021-06-05 04:43:24,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:24,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778342673] [2021-06-05 04:43:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:24,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:24,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778342673] [2021-06-05 04:43:24,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778342673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:24,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227582022] [2021-06-05 04:43:24,701 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 04:43:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:24,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:24,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:24,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227582022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:24,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:24,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:24,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881847741] [2021-06-05 04:43:24,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:24,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:24,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:24,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:24,866 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 04:43:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:25,085 INFO L93 Difference]: Finished difference Result 391 states and 1133 transitions. [2021-06-05 04:43:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:43:25,085 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 04:43:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:25,085 INFO L225 Difference]: With dead ends: 391 [2021-06-05 04:43:25,085 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 04:43:25,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 04:43:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 309. [2021-06-05 04:43:25,088 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 04:43:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 927 transitions. [2021-06-05 04:43:25,089 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 927 transitions. Word has length 20 [2021-06-05 04:43:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:25,089 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 927 transitions. [2021-06-05 04:43:25,089 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 04:43:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 927 transitions. [2021-06-05 04:43:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:25,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:25,089 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:25,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3335,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:25,290 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:25,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:25,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2116960279, now seen corresponding path program 356 times [2021-06-05 04:43:25,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:25,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52501801] [2021-06-05 04:43:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:25,345 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 04:43:25,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:25,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52501801] [2021-06-05 04:43:25,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52501801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:25,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973992007] [2021-06-05 04:43:25,346 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 04:43:25,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:25,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:25,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:25,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973992007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:25,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:25,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:25,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661471856] [2021-06-05 04:43:25,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:25,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:25,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:25,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:25,501 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 04:43:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:25,671 INFO L93 Difference]: Finished difference Result 366 states and 1083 transitions. [2021-06-05 04:43:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:25,671 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 04:43:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:25,672 INFO L225 Difference]: With dead ends: 366 [2021-06-05 04:43:25,672 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 04:43:25,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:25,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 04:43:25,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 304. [2021-06-05 04:43:25,675 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 04:43:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 912 transitions. [2021-06-05 04:43:25,675 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 912 transitions. Word has length 20 [2021-06-05 04:43:25,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:25,675 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 912 transitions. [2021-06-05 04:43:25,675 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 04:43:25,675 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 912 transitions. [2021-06-05 04:43:25,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:25,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:25,676 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:25,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:25,876 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:25,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:25,876 INFO L82 PathProgramCache]: Analyzing trace with hash -41862621, now seen corresponding path program 357 times [2021-06-05 04:43:25,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:25,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227427530] [2021-06-05 04:43:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:25,923 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 04:43:25,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:25,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227427530] [2021-06-05 04:43:25,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227427530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:25,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77317341] [2021-06-05 04:43:25,923 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 04:43:25,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:43:25,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:25,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:26,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:26,030 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 12 treesize of output 8 [2021-06-05 04:43:26,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:26,033 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 13 treesize of output 9 [2021-06-05 04:43:26,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:26,045 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:43:26,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:26,046 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:43:26,077 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 04:43:26,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77317341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:26,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:26,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:26,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762224573] [2021-06-05 04:43:26,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:26,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:26,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:26,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:26,078 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 04:43:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:26,232 INFO L93 Difference]: Finished difference Result 446 states and 1311 transitions. [2021-06-05 04:43:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:26,233 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 04:43:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:26,233 INFO L225 Difference]: With dead ends: 446 [2021-06-05 04:43:26,233 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 04:43:26,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:43:26,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 04:43:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 303. [2021-06-05 04:43:26,236 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 04:43:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 908 transitions. [2021-06-05 04:43:26,237 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 908 transitions. Word has length 20 [2021-06-05 04:43:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:26,237 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 908 transitions. [2021-06-05 04:43:26,237 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 04:43:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 908 transitions. [2021-06-05 04:43:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:26,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:26,237 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:26,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3348,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:26,438 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:26,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1591188771, now seen corresponding path program 358 times [2021-06-05 04:43:26,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:26,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386604419] [2021-06-05 04:43:26,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:26,515 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 04:43:26,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:26,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386604419] [2021-06-05 04:43:26,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386604419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:26,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842660506] [2021-06-05 04:43:26,515 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 04:43:26,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:26,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:26,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:26,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:26,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:26,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:26,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:26,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:26,654 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:43:26,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:26,654 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:43:26,683 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 04:43:26,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842660506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:26,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:26,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:43:26,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055374927] [2021-06-05 04:43:26,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:43:26,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:26,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:43:26,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:43:26,684 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 04:43:26,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:26,859 INFO L93 Difference]: Finished difference Result 481 states and 1401 transitions. [2021-06-05 04:43:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:26,859 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 04:43:26,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:26,860 INFO L225 Difference]: With dead ends: 481 [2021-06-05 04:43:26,860 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 04:43:26,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:26,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 04:43:26,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 306. [2021-06-05 04:43:26,863 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 04:43:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 923 transitions. [2021-06-05 04:43:26,864 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 923 transitions. Word has length 20 [2021-06-05 04:43:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:26,864 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 923 transitions. [2021-06-05 04:43:26,864 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 04:43:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 923 transitions. [2021-06-05 04:43:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:26,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:26,864 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:27,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:27,065 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash -365948185, now seen corresponding path program 359 times [2021-06-05 04:43:27,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:27,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566425289] [2021-06-05 04:43:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:27,113 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 04:43:27,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:27,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566425289] [2021-06-05 04:43:27,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566425289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:27,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138807612] [2021-06-05 04:43:27,113 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 04:43:27,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:27,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:27,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:27,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:27,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:27,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:27,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:43:27,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:43:27,239 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:43:27,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:43:27,239 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:43:27,267 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 04:43:27,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138807612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:27,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:27,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:43:27,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994980965] [2021-06-05 04:43:27,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:43:27,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:27,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:43:27,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:43:27,267 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 04:43:27,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:27,432 INFO L93 Difference]: Finished difference Result 438 states and 1304 transitions. [2021-06-05 04:43:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:27,432 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 04:43:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:27,433 INFO L225 Difference]: With dead ends: 438 [2021-06-05 04:43:27,433 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 04:43:27,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:27,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 04:43:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-06-05 04:43:27,436 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 04:43:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 884 transitions. [2021-06-05 04:43:27,436 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 884 transitions. Word has length 20 [2021-06-05 04:43:27,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:27,436 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 884 transitions. [2021-06-05 04:43:27,436 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 04:43:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 884 transitions. [2021-06-05 04:43:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:27,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:27,437 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:27,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3360,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:27,652 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:27,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:27,653 INFO L82 PathProgramCache]: Analyzing trace with hash 254385357, now seen corresponding path program 360 times [2021-06-05 04:43:27,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:27,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641237926] [2021-06-05 04:43:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:27,703 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 04:43:27,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:27,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641237926] [2021-06-05 04:43:27,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641237926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:27,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609589986] [2021-06-05 04:43:27,703 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 04:43:27,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:43:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:27,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:27,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:27,859 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 04:43:27,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609589986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:27,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:27,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:27,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858287388] [2021-06-05 04:43:27,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:27,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:27,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:27,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:27,860 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 04:43:28,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:28,030 INFO L93 Difference]: Finished difference Result 376 states and 1086 transitions. [2021-06-05 04:43:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:28,030 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 04:43:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:28,031 INFO L225 Difference]: With dead ends: 376 [2021-06-05 04:43:28,031 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 04:43:28,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:43:28,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 04:43:28,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 298. [2021-06-05 04:43:28,033 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 04:43:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2021-06-05 04:43:28,034 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2021-06-05 04:43:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:28,034 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2021-06-05 04:43:28,034 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 04:43:28,034 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2021-06-05 04:43:28,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:28,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:28,034 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 04:43:28,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:28,235 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:28,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:28,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1702751599, now seen corresponding path program 361 times [2021-06-05 04:43:28,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:28,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666594614] [2021-06-05 04:43:28,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:28,286 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 04:43:28,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:28,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666594614] [2021-06-05 04:43:28,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666594614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:28,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25303890] [2021-06-05 04:43:28,286 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 04:43:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:28,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:28,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:28,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25303890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:28,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:28,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:28,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566658510] [2021-06-05 04:43:28,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:28,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:28,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:28,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:28,429 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 04:43:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:28,610 INFO L93 Difference]: Finished difference Result 378 states and 1090 transitions. [2021-06-05 04:43:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:43:28,610 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 04:43:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:28,610 INFO L225 Difference]: With dead ends: 378 [2021-06-05 04:43:28,610 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 04:43:28,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:28,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 04:43:28,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 295. [2021-06-05 04:43:28,613 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 04:43:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 871 transitions. [2021-06-05 04:43:28,613 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 871 transitions. Word has length 20 [2021-06-05 04:43:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:28,614 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 871 transitions. [2021-06-05 04:43:28,614 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 04:43:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 871 transitions. [2021-06-05 04:43:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:28,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:28,614 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:28,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3373 [2021-06-05 04:43:28,814 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:28,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:28,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1700125823, now seen corresponding path program 362 times [2021-06-05 04:43:28,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:28,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832519260] [2021-06-05 04:43:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:28,887 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 04:43:28,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:28,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832519260] [2021-06-05 04:43:28,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832519260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:28,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147246246] [2021-06-05 04:43:28,887 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 04:43:28,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:28,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:28,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:28,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:29,022 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 04:43:29,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147246246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:29,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:29,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:29,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154142872] [2021-06-05 04:43:29,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:29,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:29,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:29,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:29,023 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 04:43:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:29,181 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2021-06-05 04:43:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:29,181 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 04:43:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:29,182 INFO L225 Difference]: With dead ends: 327 [2021-06-05 04:43:29,182 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 04:43:29,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:43:29,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 04:43:29,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 276. [2021-06-05 04:43:29,184 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 04:43:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 812 transitions. [2021-06-05 04:43:29,185 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 812 transitions. Word has length 20 [2021-06-05 04:43:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:29,185 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 812 transitions. [2021-06-05 04:43:29,185 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 04:43:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 812 transitions. [2021-06-05 04:43:29,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:29,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:29,185 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:29,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3378,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:29,386 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1240422079, now seen corresponding path program 363 times [2021-06-05 04:43:29,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:29,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856193326] [2021-06-05 04:43:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:29,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:29,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856193326] [2021-06-05 04:43:29,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856193326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:29,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684771491] [2021-06-05 04:43:29,439 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 04:43:29,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:43:29,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:29,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:29,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:29,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684771491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:29,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:29,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:29,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254572433] [2021-06-05 04:43:29,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:29,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:29,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:29,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:29,594 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 04:43:29,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:29,759 INFO L93 Difference]: Finished difference Result 406 states and 1173 transitions. [2021-06-05 04:43:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:29,759 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 04:43:29,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:29,759 INFO L225 Difference]: With dead ends: 406 [2021-06-05 04:43:29,759 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 04:43:29,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 04:43:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 285. [2021-06-05 04:43:29,762 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 04:43:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 851 transitions. [2021-06-05 04:43:29,763 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 851 transitions. Word has length 20 [2021-06-05 04:43:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:29,763 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 851 transitions. [2021-06-05 04:43:29,763 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 04:43:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 851 transitions. [2021-06-05 04:43:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:29,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:29,763 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 04:43:29,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-06-05 04:43:29,964 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:29,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1097408261, now seen corresponding path program 364 times [2021-06-05 04:43:29,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:29,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548438864] [2021-06-05 04:43:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:30,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:30,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548438864] [2021-06-05 04:43:30,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548438864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:30,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426407959] [2021-06-05 04:43:30,021 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 04:43:30,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:30,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:30,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:30,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426407959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:30,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:30,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:30,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208906082] [2021-06-05 04:43:30,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:30,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:30,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:30,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:30,163 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 04:43:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:30,384 INFO L93 Difference]: Finished difference Result 412 states and 1188 transitions. [2021-06-05 04:43:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:43:30,385 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 04:43:30,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:30,385 INFO L225 Difference]: With dead ends: 412 [2021-06-05 04:43:30,385 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 04:43:30,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 04:43:30,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 282. [2021-06-05 04:43:30,388 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 04:43:30,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 836 transitions. [2021-06-05 04:43:30,388 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 836 transitions. Word has length 20 [2021-06-05 04:43:30,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:30,389 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 836 transitions. [2021-06-05 04:43:30,389 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 04:43:30,389 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 836 transitions. [2021-06-05 04:43:30,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:30,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:30,389 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 04:43:30,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:30,589 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:30,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:30,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1100034037, now seen corresponding path program 365 times [2021-06-05 04:43:30,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:30,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329242895] [2021-06-05 04:43:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:30,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:30,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329242895] [2021-06-05 04:43:30,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329242895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:30,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394724917] [2021-06-05 04:43:30,641 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 04:43:30,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:30,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:30,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:30,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:30,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394724917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:30,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:30,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:30,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883349958] [2021-06-05 04:43:30,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:30,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:30,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:30,782 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 04:43:30,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:30,950 INFO L93 Difference]: Finished difference Result 376 states and 1096 transitions. [2021-06-05 04:43:30,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:30,950 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 04:43:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:30,950 INFO L225 Difference]: With dead ends: 376 [2021-06-05 04:43:30,950 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 04:43:30,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 04:43:30,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-06-05 04:43:30,953 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 04:43:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 824 transitions. [2021-06-05 04:43:30,953 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 824 transitions. Word has length 20 [2021-06-05 04:43:30,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:30,953 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 824 transitions. [2021-06-05 04:43:30,954 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 04:43:30,954 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 824 transitions. [2021-06-05 04:43:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:30,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:30,954 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 04:43:31,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3393 [2021-06-05 04:43:31,154 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:31,154 INFO L82 PathProgramCache]: Analyzing trace with hash -419004761, now seen corresponding path program 366 times [2021-06-05 04:43:31,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:31,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590542862] [2021-06-05 04:43:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:31,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:31,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590542862] [2021-06-05 04:43:31,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590542862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:31,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642579717] [2021-06-05 04:43:31,202 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 04:43:31,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:43:31,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:31,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:31,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:31,331 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 04:43:31,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642579717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:31,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:31,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:43:31,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931536890] [2021-06-05 04:43:31,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:43:31,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:43:31,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:43:31,332 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 04:43:31,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:31,504 INFO L93 Difference]: Finished difference Result 367 states and 1069 transitions. [2021-06-05 04:43:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:31,504 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 04:43:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:31,505 INFO L225 Difference]: With dead ends: 367 [2021-06-05 04:43:31,505 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 04:43:31,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:43:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 04:43:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 285. [2021-06-05 04:43:31,507 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 04:43:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 839 transitions. [2021-06-05 04:43:31,508 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 839 transitions. Word has length 20 [2021-06-05 04:43:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:31,508 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 839 transitions. [2021-06-05 04:43:31,508 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 04:43:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 839 transitions. [2021-06-05 04:43:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:31,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:31,508 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 04:43:31,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-06-05 04:43:31,709 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:31,709 INFO L82 PathProgramCache]: Analyzing trace with hash 229944241, now seen corresponding path program 367 times [2021-06-05 04:43:31,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:31,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028830843] [2021-06-05 04:43:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:31,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:31,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028830843] [2021-06-05 04:43:31,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028830843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:31,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199220474] [2021-06-05 04:43:31,769 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 04:43:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:31,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:31,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:31,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199220474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:31,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:31,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:31,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039394535] [2021-06-05 04:43:31,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:31,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:31,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:31,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:31,931 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 04:43:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:32,148 INFO L93 Difference]: Finished difference Result 525 states and 1507 transitions. [2021-06-05 04:43:32,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:32,148 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 04:43:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:32,149 INFO L225 Difference]: With dead ends: 525 [2021-06-05 04:43:32,149 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 04:43:32,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 04:43:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 297. [2021-06-05 04:43:32,152 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 04:43:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 893 transitions. [2021-06-05 04:43:32,153 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 893 transitions. Word has length 20 [2021-06-05 04:43:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:32,153 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 893 transitions. [2021-06-05 04:43:32,153 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 04:43:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 893 transitions. [2021-06-05 04:43:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:32,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:32,153 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:32,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:32,354 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:32,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:32,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1263963481, now seen corresponding path program 368 times [2021-06-05 04:43:32,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:32,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639098631] [2021-06-05 04:43:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:32,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:32,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639098631] [2021-06-05 04:43:32,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639098631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:32,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822274602] [2021-06-05 04:43:32,416 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 04:43:32,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:32,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:32,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:32,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:32,579 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 04:43:32,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822274602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:32,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:32,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:32,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926086239] [2021-06-05 04:43:32,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:32,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:32,580 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 04:43:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:32,788 INFO L93 Difference]: Finished difference Result 511 states and 1456 transitions. [2021-06-05 04:43:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:32,788 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 04:43:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:32,789 INFO L225 Difference]: With dead ends: 511 [2021-06-05 04:43:32,789 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 04:43:32,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:32,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 04:43:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 300. [2021-06-05 04:43:32,792 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 04:43:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2021-06-05 04:43:32,792 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2021-06-05 04:43:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:32,793 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2021-06-05 04:43:32,793 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 04:43:32,793 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2021-06-05 04:43:32,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:32,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:32,793 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:32,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3409 [2021-06-05 04:43:32,993 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:32,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:32,994 INFO L82 PathProgramCache]: Analyzing trace with hash 981344679, now seen corresponding path program 369 times [2021-06-05 04:43:32,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:32,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651230645] [2021-06-05 04:43:32,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:33,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:33,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651230645] [2021-06-05 04:43:33,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651230645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:33,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579475972] [2021-06-05 04:43:33,056 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 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 04:43:33,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:43:33,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:33,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:33,219 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 04:43:33,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579475972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:33,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:33,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:33,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752035473] [2021-06-05 04:43:33,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:33,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:33,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:33,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:33,220 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 04:43:33,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:33,617 INFO L93 Difference]: Finished difference Result 582 states and 1654 transitions. [2021-06-05 04:43:33,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:33,617 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 04:43:33,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:33,618 INFO L225 Difference]: With dead ends: 582 [2021-06-05 04:43:33,618 INFO L226 Difference]: Without dead ends: 582 [2021-06-05 04:43:33,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:43:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-05 04:43:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 303. [2021-06-05 04:43:33,621 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 04:43:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-06-05 04:43:33,622 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-06-05 04:43:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:33,622 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-06-05 04:43:33,622 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 04:43:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-06-05 04:43:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:33,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:33,622 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 04:43:33,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3417,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:33,823 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:33,823 INFO L82 PathProgramCache]: Analyzing trace with hash -2021280217, now seen corresponding path program 370 times [2021-06-05 04:43:33,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:33,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819792167] [2021-06-05 04:43:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:33,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:33,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819792167] [2021-06-05 04:43:33,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819792167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:33,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985686929] [2021-06-05 04:43:33,890 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 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 04:43:33,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:33,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:33,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:33,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:34,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985686929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:34,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:34,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:34,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47514498] [2021-06-05 04:43:34,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:34,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:34,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:34,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:34,056 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 04:43:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:34,438 INFO L93 Difference]: Finished difference Result 551 states and 1587 transitions. [2021-06-05 04:43:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:34,438 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 04:43:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:34,439 INFO L225 Difference]: With dead ends: 551 [2021-06-05 04:43:34,439 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 04:43:34,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:43:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 04:43:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 300. [2021-06-05 04:43:34,443 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 04:43:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 895 transitions. [2021-06-05 04:43:34,443 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 895 transitions. Word has length 20 [2021-06-05 04:43:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:34,443 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 895 transitions. [2021-06-05 04:43:34,443 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 04:43:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 895 transitions. [2021-06-05 04:43:34,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:34,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:34,444 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 04:43:34,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3425 [2021-06-05 04:43:34,644 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:34,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1002081207, now seen corresponding path program 371 times [2021-06-05 04:43:34,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:34,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443750884] [2021-06-05 04:43:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:34,702 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 04:43:34,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:34,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443750884] [2021-06-05 04:43:34,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443750884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:34,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995621932] [2021-06-05 04:43:34,703 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 04:43:34,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:43:34,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:34,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:34,866 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 04:43:34,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995621932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:34,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:34,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:34,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701076233] [2021-06-05 04:43:34,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:34,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:34,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:34,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:34,866 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 04:43:35,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:35,226 INFO L93 Difference]: Finished difference Result 548 states and 1535 transitions. [2021-06-05 04:43:35,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:35,226 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 04:43:35,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:35,227 INFO L225 Difference]: With dead ends: 548 [2021-06-05 04:43:35,227 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 04:43:35,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:43:35,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 04:43:35,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 304. [2021-06-05 04:43:35,231 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 04:43:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 909 transitions. [2021-06-05 04:43:35,231 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 909 transitions. Word has length 20 [2021-06-05 04:43:35,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:35,231 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 909 transitions. [2021-06-05 04:43:35,231 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 04:43:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 909 transitions. [2021-06-05 04:43:35,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:35,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:35,231 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 04:43:35,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3433,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:35,432 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:35,432 INFO L82 PathProgramCache]: Analyzing trace with hash -913342719, now seen corresponding path program 372 times [2021-06-05 04:43:35,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:35,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837232288] [2021-06-05 04:43:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:35,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:35,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837232288] [2021-06-05 04:43:35,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837232288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:35,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477038621] [2021-06-05 04:43:35,500 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 04:43:35,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:43:35,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:35,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:35,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:35,665 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 04:43:35,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477038621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:35,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:35,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:35,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497381902] [2021-06-05 04:43:35,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:35,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:35,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:35,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:35,666 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 04:43:36,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:36,048 INFO L93 Difference]: Finished difference Result 531 states and 1517 transitions. [2021-06-05 04:43:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:36,049 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 04:43:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:36,049 INFO L225 Difference]: With dead ends: 531 [2021-06-05 04:43:36,049 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 04:43:36,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:43:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 04:43:36,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2021-06-05 04:43:36,053 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 04:43:36,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2021-06-05 04:43:36,053 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2021-06-05 04:43:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:36,053 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2021-06-05 04:43:36,053 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 04:43:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2021-06-05 04:43:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:36,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:36,054 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 04:43:36,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3442,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:36,254 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:36,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1131083951, now seen corresponding path program 373 times [2021-06-05 04:43:36,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:36,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782061968] [2021-06-05 04:43:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:36,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:36,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782061968] [2021-06-05 04:43:36,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782061968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:36,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453448066] [2021-06-05 04:43:36,348 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 04:43:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:36,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:36,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:36,510 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 04:43:36,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453448066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:36,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:36,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:36,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721567587] [2021-06-05 04:43:36,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:36,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:36,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:36,511 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 04:43:36,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:36,735 INFO L93 Difference]: Finished difference Result 508 states and 1482 transitions. [2021-06-05 04:43:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:36,735 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 04:43:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:36,736 INFO L225 Difference]: With dead ends: 508 [2021-06-05 04:43:36,736 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 04:43:36,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:36,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 04:43:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 307. [2021-06-05 04:43:36,739 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 04:43:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 926 transitions. [2021-06-05 04:43:36,740 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 926 transitions. Word has length 20 [2021-06-05 04:43:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:36,740 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 926 transitions. [2021-06-05 04:43:36,740 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 04:43:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 926 transitions. [2021-06-05 04:43:36,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:36,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:36,740 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:36,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3450 [2021-06-05 04:43:36,941 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash 161258449, now seen corresponding path program 374 times [2021-06-05 04:43:36,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:36,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154796166] [2021-06-05 04:43:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:37,004 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 04:43:37,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:37,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154796166] [2021-06-05 04:43:37,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154796166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:37,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338591202] [2021-06-05 04:43:37,004 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 04:43:37,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:37,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:37,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:37,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:37,174 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 04:43:37,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338591202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:37,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:37,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:37,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067989418] [2021-06-05 04:43:37,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:37,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:37,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:37,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:37,175 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 04:43:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:37,527 INFO L93 Difference]: Finished difference Result 502 states and 1464 transitions. [2021-06-05 04:43:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:43:37,528 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 04:43:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:37,528 INFO L225 Difference]: With dead ends: 502 [2021-06-05 04:43:37,528 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 04:43:37,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:37,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 04:43:37,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 304. [2021-06-05 04:43:37,532 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 04:43:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 911 transitions. [2021-06-05 04:43:37,532 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 911 transitions. Word has length 20 [2021-06-05 04:43:37,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:37,532 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 911 transitions. [2021-06-05 04:43:37,532 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 04:43:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 911 transitions. [2021-06-05 04:43:37,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:37,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:37,533 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:37,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3457,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:37,745 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:37,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1734606587, now seen corresponding path program 375 times [2021-06-05 04:43:37,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:37,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580113572] [2021-06-05 04:43:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:37,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:37,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580113572] [2021-06-05 04:43:37,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580113572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:37,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784010673] [2021-06-05 04:43:37,804 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 04:43:37,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:43:37,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:37,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:37,978 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 04:43:37,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784010673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:37,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:37,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:37,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351141313] [2021-06-05 04:43:37,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:37,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:37,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:37,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:37,978 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 04:43:38,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:38,234 INFO L93 Difference]: Finished difference Result 463 states and 1357 transitions. [2021-06-05 04:43:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:38,234 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 04:43:38,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:38,235 INFO L225 Difference]: With dead ends: 463 [2021-06-05 04:43:38,235 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 04:43:38,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 04:43:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 301. [2021-06-05 04:43:38,238 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 04:43:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 899 transitions. [2021-06-05 04:43:38,238 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 899 transitions. Word has length 20 [2021-06-05 04:43:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:38,238 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 899 transitions. [2021-06-05 04:43:38,238 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 04:43:38,238 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 899 transitions. [2021-06-05 04:43:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:38,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:38,239 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:38,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3464,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:38,439 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:38,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:38,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1917162695, now seen corresponding path program 376 times [2021-06-05 04:43:38,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:38,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739692288] [2021-06-05 04:43:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:38,501 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 04:43:38,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:38,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739692288] [2021-06-05 04:43:38,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739692288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:38,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777601685] [2021-06-05 04:43:38,501 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 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 04:43:38,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:38,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:38,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:38,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:38,696 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 04:43:38,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777601685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:38,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:38,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:38,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738421165] [2021-06-05 04:43:38,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:38,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:38,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:38,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:38,697 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 04:43:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:38,914 INFO L93 Difference]: Finished difference Result 478 states and 1367 transitions. [2021-06-05 04:43:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:38,914 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 04:43:38,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:38,914 INFO L225 Difference]: With dead ends: 478 [2021-06-05 04:43:38,914 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 04:43:38,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 04:43:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 309. [2021-06-05 04:43:38,918 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 04:43:38,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-06-05 04:43:38,918 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-06-05 04:43:38,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:38,918 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-06-05 04:43:38,918 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 04:43:38,918 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-06-05 04:43:38,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:38,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:38,919 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 04:43:39,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3469,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:39,119 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:39,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1738769, now seen corresponding path program 377 times [2021-06-05 04:43:39,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:39,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813678154] [2021-06-05 04:43:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:39,178 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 04:43:39,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:39,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813678154] [2021-06-05 04:43:39,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813678154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:39,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170689591] [2021-06-05 04:43:39,178 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 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 04:43:39,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:43:39,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:39,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:39,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:39,340 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 04:43:39,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170689591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:39,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:39,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:39,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47345307] [2021-06-05 04:43:39,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:39,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:39,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:39,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:39,341 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 04:43:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:39,646 INFO L93 Difference]: Finished difference Result 484 states and 1388 transitions. [2021-06-05 04:43:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:43:39,647 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 04:43:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:39,647 INFO L225 Difference]: With dead ends: 484 [2021-06-05 04:43:39,647 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 04:43:39,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 04:43:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 305. [2021-06-05 04:43:39,651 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 04:43:39,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2021-06-05 04:43:39,651 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2021-06-05 04:43:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:39,651 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2021-06-05 04:43:39,651 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 04:43:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2021-06-05 04:43:39,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:39,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:39,652 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 04:43:39,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:39,852 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:39,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:39,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1041974567, now seen corresponding path program 378 times [2021-06-05 04:43:39,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:39,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988141902] [2021-06-05 04:43:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:39,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:39,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988141902] [2021-06-05 04:43:39,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988141902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:39,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112253732] [2021-06-05 04:43:39,912 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 04:43:39,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:43:39,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:39,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:39,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:40,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112253732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:40,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:40,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:40,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869261790] [2021-06-05 04:43:40,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:40,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:40,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:40,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:40,075 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 04:43:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:40,305 INFO L93 Difference]: Finished difference Result 459 states and 1338 transitions. [2021-06-05 04:43:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:40,306 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 04:43:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:40,306 INFO L225 Difference]: With dead ends: 459 [2021-06-05 04:43:40,306 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 04:43:40,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 04:43:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 302. [2021-06-05 04:43:40,309 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 04:43:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 902 transitions. [2021-06-05 04:43:40,310 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 902 transitions. Word has length 20 [2021-06-05 04:43:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:40,310 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 902 transitions. [2021-06-05 04:43:40,310 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 04:43:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 902 transitions. [2021-06-05 04:43:40,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:40,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:40,310 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 04:43:40,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3485 [2021-06-05 04:43:40,511 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:40,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:40,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1890949637, now seen corresponding path program 379 times [2021-06-05 04:43:40,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:40,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064988538] [2021-06-05 04:43:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:40,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:40,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064988538] [2021-06-05 04:43:40,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064988538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:40,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204290991] [2021-06-05 04:43:40,576 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 04:43:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:40,734 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 04:43:40,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204290991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:40,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:40,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:40,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719054977] [2021-06-05 04:43:40,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:40,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:40,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:40,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:40,735 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 04:43:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:40,980 INFO L93 Difference]: Finished difference Result 556 states and 1611 transitions. [2021-06-05 04:43:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:40,981 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 04:43:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:40,981 INFO L225 Difference]: With dead ends: 556 [2021-06-05 04:43:40,981 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 04:43:40,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:40,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 04:43:40,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 305. [2021-06-05 04:43:40,985 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 04:43:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 911 transitions. [2021-06-05 04:43:40,985 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 911 transitions. Word has length 20 [2021-06-05 04:43:40,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:40,985 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 911 transitions. [2021-06-05 04:43:40,985 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 04:43:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 911 transitions. [2021-06-05 04:43:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:40,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:40,986 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:41,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3490,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:41,186 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:41,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1111675259, now seen corresponding path program 380 times [2021-06-05 04:43:41,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:41,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509473672] [2021-06-05 04:43:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:41,245 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 04:43:41,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:41,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509473672] [2021-06-05 04:43:41,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509473672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:41,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917986221] [2021-06-05 04:43:41,245 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 04:43:41,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:41,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:41,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:41,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:41,408 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 04:43:41,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917986221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:41,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:41,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:41,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992371847] [2021-06-05 04:43:41,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:41,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:41,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:41,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:41,412 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 04:43:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:41,701 INFO L93 Difference]: Finished difference Result 558 states and 1615 transitions. [2021-06-05 04:43:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:43:41,702 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 04:43:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:41,702 INFO L225 Difference]: With dead ends: 558 [2021-06-05 04:43:41,702 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 04:43:41,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 04:43:41,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 302. [2021-06-05 04:43:41,706 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 04:43:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 896 transitions. [2021-06-05 04:43:41,706 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 896 transitions. Word has length 20 [2021-06-05 04:43:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:41,706 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 896 transitions. [2021-06-05 04:43:41,706 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 04:43:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 896 transitions. [2021-06-05 04:43:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:41,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:41,707 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 04:43:41,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3496 [2021-06-05 04:43:41,908 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:41,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:41,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1287427001, now seen corresponding path program 381 times [2021-06-05 04:43:41,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:41,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169029786] [2021-06-05 04:43:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:41,968 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 04:43:41,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:41,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169029786] [2021-06-05 04:43:41,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169029786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:41,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717472983] [2021-06-05 04:43:41,969 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 04:43:42,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:43:42,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:42,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:42,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:42,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717472983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:42,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:42,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:43:42,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152117320] [2021-06-05 04:43:42,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:43:42,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:42,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:43:42,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:43:42,139 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 04:43:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:42,361 INFO L93 Difference]: Finished difference Result 509 states and 1479 transitions. [2021-06-05 04:43:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:42,362 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 04:43:42,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:42,362 INFO L225 Difference]: With dead ends: 509 [2021-06-05 04:43:42,362 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 04:43:42,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 04:43:42,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 289. [2021-06-05 04:43:42,366 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 04:43:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 855 transitions. [2021-06-05 04:43:42,366 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 855 transitions. Word has length 20 [2021-06-05 04:43:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:42,366 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 855 transitions. [2021-06-05 04:43:42,366 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 04:43:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 855 transitions. [2021-06-05 04:43:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:42,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:42,367 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:42,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3502,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:42,569 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:42,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1746703769, now seen corresponding path program 382 times [2021-06-05 04:43:42,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:42,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419935435] [2021-06-05 04:43:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:42,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:42,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419935435] [2021-06-05 04:43:42,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419935435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:42,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226890724] [2021-06-05 04:43:42,622 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 04:43:42,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:42,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:42,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:42,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:42,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226890724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:42,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:42,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:42,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939712068] [2021-06-05 04:43:42,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:42,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:42,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:42,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:42,768 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 04:43:42,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:42,971 INFO L93 Difference]: Finished difference Result 544 states and 1551 transitions. [2021-06-05 04:43:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:42,971 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 04:43:42,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:42,972 INFO L225 Difference]: With dead ends: 544 [2021-06-05 04:43:42,972 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 04:43:42,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 04:43:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 286. [2021-06-05 04:43:42,975 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 04:43:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 843 transitions. [2021-06-05 04:43:42,976 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 843 transitions. Word has length 20 [2021-06-05 04:43:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:42,976 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 843 transitions. [2021-06-05 04:43:42,976 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 04:43:42,976 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 843 transitions. [2021-06-05 04:43:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:42,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:42,976 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 04:43:43,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3506,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:43,177 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash 7762133, now seen corresponding path program 383 times [2021-06-05 04:43:43,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:43,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260571247] [2021-06-05 04:43:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:43,229 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 04:43:43,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:43,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260571247] [2021-06-05 04:43:43,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260571247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:43,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288462606] [2021-06-05 04:43:43,229 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 04:43:43,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:43:43,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:43,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:43,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:43,376 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 04:43:43,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288462606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:43,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:43,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:43,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457776114] [2021-06-05 04:43:43,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:43,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:43,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:43,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:43,377 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 04:43:43,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:43,589 INFO L93 Difference]: Finished difference Result 442 states and 1250 transitions. [2021-06-05 04:43:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:43,589 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 04:43:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:43,590 INFO L225 Difference]: With dead ends: 442 [2021-06-05 04:43:43,590 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 04:43:43,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 04:43:43,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 304. [2021-06-05 04:43:43,593 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 04:43:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 894 transitions. [2021-06-05 04:43:43,593 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 894 transitions. Word has length 20 [2021-06-05 04:43:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:43,594 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 894 transitions. [2021-06-05 04:43:43,594 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 04:43:43,594 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 894 transitions. [2021-06-05 04:43:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:43,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:43,594 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 04:43:43,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3511,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:43,794 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:43,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:43,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1907661793, now seen corresponding path program 384 times [2021-06-05 04:43:43,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:43,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025816618] [2021-06-05 04:43:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:43,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:43,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025816618] [2021-06-05 04:43:43,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025816618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:43,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031536514] [2021-06-05 04:43:43,849 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 04:43:43,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:43:43,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:43,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:43,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:43,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031536514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:43,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:43,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:43,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974480995] [2021-06-05 04:43:43,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:43,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:43,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:43,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:43,996 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 04:43:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:44,265 INFO L93 Difference]: Finished difference Result 448 states and 1271 transitions. [2021-06-05 04:43:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:43:44,265 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 04:43:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:44,266 INFO L225 Difference]: With dead ends: 448 [2021-06-05 04:43:44,266 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 04:43:44,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 04:43:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 302. [2021-06-05 04:43:44,269 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 04:43:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 889 transitions. [2021-06-05 04:43:44,269 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 889 transitions. Word has length 20 [2021-06-05 04:43:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:44,269 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 889 transitions. [2021-06-05 04:43:44,269 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 04:43:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 889 transitions. [2021-06-05 04:43:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:44,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:44,270 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:44,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3518,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:44,470 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash -867425995, now seen corresponding path program 385 times [2021-06-05 04:43:44,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:44,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327697819] [2021-06-05 04:43:44,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:44,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:44,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327697819] [2021-06-05 04:43:44,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327697819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:44,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403588757] [2021-06-05 04:43:44,523 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 04:43:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:44,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:44,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:44,797 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 04:43:44,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403588757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:44,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:44,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:43:44,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441511414] [2021-06-05 04:43:44,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:43:44,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:44,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:43:44,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:43:44,798 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 04:43:45,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:45,012 INFO L93 Difference]: Finished difference Result 431 states and 1243 transitions. [2021-06-05 04:43:45,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:45,012 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 04:43:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:45,013 INFO L225 Difference]: With dead ends: 431 [2021-06-05 04:43:45,013 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 04:43:45,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:43:45,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 04:43:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 300. [2021-06-05 04:43:45,016 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 04:43:45,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 884 transitions. [2021-06-05 04:43:45,016 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 884 transitions. Word has length 20 [2021-06-05 04:43:45,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:45,016 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 884 transitions. [2021-06-05 04:43:45,016 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 04:43:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 884 transitions. [2021-06-05 04:43:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:45,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:45,017 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 04:43:45,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3526 [2021-06-05 04:43:45,217 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:45,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:45,217 INFO L82 PathProgramCache]: Analyzing trace with hash 892626945, now seen corresponding path program 386 times [2021-06-05 04:43:45,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:45,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316052504] [2021-06-05 04:43:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:45,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:45,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316052504] [2021-06-05 04:43:45,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316052504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:45,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782632177] [2021-06-05 04:43:45,268 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 04:43:45,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:45,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:45,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:45,404 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 04:43:45,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782632177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:45,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:45,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:43:45,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074621900] [2021-06-05 04:43:45,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:43:45,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:45,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:43:45,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:43:45,405 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 04:43:45,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:45,617 INFO L93 Difference]: Finished difference Result 456 states and 1297 transitions. [2021-06-05 04:43:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:45,617 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 04:43:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:45,618 INFO L225 Difference]: With dead ends: 456 [2021-06-05 04:43:45,618 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 04:43:45,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:43:45,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 04:43:45,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 288. [2021-06-05 04:43:45,621 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 04:43:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 848 transitions. [2021-06-05 04:43:45,621 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 848 transitions. Word has length 20 [2021-06-05 04:43:45,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:45,622 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 848 transitions. [2021-06-05 04:43:45,622 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 04:43:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 848 transitions. [2021-06-05 04:43:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:45,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:45,622 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 04:43:45,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:45,828 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:45,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:45,828 INFO L82 PathProgramCache]: Analyzing trace with hash 537179841, now seen corresponding path program 387 times [2021-06-05 04:43:45,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:45,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771077988] [2021-06-05 04:43:45,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:45,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:45,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771077988] [2021-06-05 04:43:45,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771077988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:45,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042120639] [2021-06-05 04:43:45,889 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 04:43:45,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:43:45,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:45,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:45,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:46,106 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 04:43:46,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042120639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:46,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:46,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:46,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163147147] [2021-06-05 04:43:46,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:46,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:46,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:46,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:46,107 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 04:43:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:46,413 INFO L93 Difference]: Finished difference Result 369 states and 1060 transitions. [2021-06-05 04:43:46,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:46,413 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 04:43:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:46,414 INFO L225 Difference]: With dead ends: 369 [2021-06-05 04:43:46,414 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 04:43:46,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 04:43:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 297. [2021-06-05 04:43:46,416 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 04:43:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 883 transitions. [2021-06-05 04:43:46,417 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 883 transitions. Word has length 20 [2021-06-05 04:43:46,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:46,417 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 883 transitions. [2021-06-05 04:43:46,417 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 04:43:46,417 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 883 transitions. [2021-06-05 04:43:46,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:46,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:46,417 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:46,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3535 [2021-06-05 04:43:46,618 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:46,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:46,618 INFO L82 PathProgramCache]: Analyzing trace with hash -956727881, now seen corresponding path program 388 times [2021-06-05 04:43:46,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:46,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122207930] [2021-06-05 04:43:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:46,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:46,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122207930] [2021-06-05 04:43:46,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122207930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:46,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74664906] [2021-06-05 04:43:46,680 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 04:43:46,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:46,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:46,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:46,884 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 04:43:46,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74664906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:46,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:46,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:46,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260741431] [2021-06-05 04:43:46,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:46,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:46,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:46,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:46,885 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 04:43:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:47,172 INFO L93 Difference]: Finished difference Result 375 states and 1067 transitions. [2021-06-05 04:43:47,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:47,172 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 04:43:47,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:47,173 INFO L225 Difference]: With dead ends: 375 [2021-06-05 04:43:47,173 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 04:43:47,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 04:43:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 294. [2021-06-05 04:43:47,176 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 04:43:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2021-06-05 04:43:47,176 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2021-06-05 04:43:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:47,176 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2021-06-05 04:43:47,176 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 04:43:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2021-06-05 04:43:47,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:47,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:47,176 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:47,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:47,377 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:47,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:47,377 INFO L82 PathProgramCache]: Analyzing trace with hash -418872303, now seen corresponding path program 389 times [2021-06-05 04:43:47,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:47,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983047023] [2021-06-05 04:43:47,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:47,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:47,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983047023] [2021-06-05 04:43:47,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983047023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:47,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915726430] [2021-06-05 04:43:47,428 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 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 04:43:47,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:47,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:47,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:47,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:47,639 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 04:43:47,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915726430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:47,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:47,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:47,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207197486] [2021-06-05 04:43:47,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:47,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:47,640 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 04:43:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:47,989 INFO L93 Difference]: Finished difference Result 339 states and 985 transitions. [2021-06-05 04:43:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:47,989 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 04:43:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:47,989 INFO L225 Difference]: With dead ends: 339 [2021-06-05 04:43:47,989 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 04:43:47,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:47,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 04:43:47,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 291. [2021-06-05 04:43:47,992 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 04:43:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-06-05 04:43:47,992 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2021-06-05 04:43:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:47,992 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-06-05 04:43:47,992 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 04:43:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-06-05 04:43:47,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:47,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:47,993 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 04:43:48,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3550 [2021-06-05 04:43:48,193 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:48,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:48,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1939210357, now seen corresponding path program 390 times [2021-06-05 04:43:48,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:48,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966408356] [2021-06-05 04:43:48,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:48,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:48,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966408356] [2021-06-05 04:43:48,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966408356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:48,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648104930] [2021-06-05 04:43:48,257 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 04:43:48,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:43:48,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:48,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:48,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:48,484 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 04:43:48,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648104930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:48,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:48,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:48,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064113179] [2021-06-05 04:43:48,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:48,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:48,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:48,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:48,485 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 04:43:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:48,753 INFO L93 Difference]: Finished difference Result 456 states and 1278 transitions. [2021-06-05 04:43:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:48,753 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 04:43:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:48,753 INFO L225 Difference]: With dead ends: 456 [2021-06-05 04:43:48,753 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 04:43:48,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:48,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 04:43:48,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 299. [2021-06-05 04:43:48,756 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 04:43:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 897 transitions. [2021-06-05 04:43:48,757 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 897 transitions. Word has length 20 [2021-06-05 04:43:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:48,757 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 897 transitions. [2021-06-05 04:43:48,757 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 04:43:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 897 transitions. [2021-06-05 04:43:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:48,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:48,757 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:48,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-06-05 04:43:48,958 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:48,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:48,958 INFO L82 PathProgramCache]: Analyzing trace with hash 861849217, now seen corresponding path program 391 times [2021-06-05 04:43:48,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:48,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087184109] [2021-06-05 04:43:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:49,021 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 04:43:49,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:49,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087184109] [2021-06-05 04:43:49,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087184109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:49,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114098498] [2021-06-05 04:43:49,021 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 04:43:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:49,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:49,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:49,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114098498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:49,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:49,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:49,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157640323] [2021-06-05 04:43:49,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:49,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:49,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:49,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:49,218 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 04:43:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:49,480 INFO L93 Difference]: Finished difference Result 462 states and 1279 transitions. [2021-06-05 04:43:49,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:49,481 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 04:43:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:49,481 INFO L225 Difference]: With dead ends: 462 [2021-06-05 04:43:49,481 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 04:43:49,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 04:43:49,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 302. [2021-06-05 04:43:49,484 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 04:43:49,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 899 transitions. [2021-06-05 04:43:49,485 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 899 transitions. Word has length 20 [2021-06-05 04:43:49,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:49,485 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 899 transitions. [2021-06-05 04:43:49,485 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 04:43:49,485 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 899 transitions. [2021-06-05 04:43:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:49,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:49,485 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:49,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3568,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:49,686 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:49,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:49,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1187809919, now seen corresponding path program 392 times [2021-06-05 04:43:49,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:49,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730537631] [2021-06-05 04:43:49,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:49,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:49,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730537631] [2021-06-05 04:43:49,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730537631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:49,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111805999] [2021-06-05 04:43:49,755 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 04:43:49,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:49,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:49,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:49,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:49,973 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 04:43:49,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111805999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:49,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:49,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:49,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400796165] [2021-06-05 04:43:49,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:49,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:49,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:49,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:49,974 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 04:43:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:50,193 INFO L93 Difference]: Finished difference Result 424 states and 1199 transitions. [2021-06-05 04:43:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:50,193 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 04:43:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:50,194 INFO L225 Difference]: With dead ends: 424 [2021-06-05 04:43:50,194 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 04:43:50,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 04:43:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 295. [2021-06-05 04:43:50,196 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 04:43:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 881 transitions. [2021-06-05 04:43:50,197 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 881 transitions. Word has length 20 [2021-06-05 04:43:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:50,197 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 881 transitions. [2021-06-05 04:43:50,197 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 04:43:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 881 transitions. [2021-06-05 04:43:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:50,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:50,197 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 04:43:50,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:50,398 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:50,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:50,398 INFO L82 PathProgramCache]: Analyzing trace with hash 104532481, now seen corresponding path program 393 times [2021-06-05 04:43:50,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:50,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595124334] [2021-06-05 04:43:50,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:50,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:50,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595124334] [2021-06-05 04:43:50,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595124334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:50,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428216463] [2021-06-05 04:43:50,467 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 04:43:50,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:43:50,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:50,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:50,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428216463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:50,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:50,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:50,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33898100] [2021-06-05 04:43:50,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:50,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:50,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:50,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:50,671 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 04:43:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:50,953 INFO L93 Difference]: Finished difference Result 387 states and 1117 transitions. [2021-06-05 04:43:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:50,954 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 04:43:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:50,954 INFO L225 Difference]: With dead ends: 387 [2021-06-05 04:43:50,954 INFO L226 Difference]: Without dead ends: 387 [2021-06-05 04:43:50,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:50,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-05 04:43:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 292. [2021-06-05 04:43:50,957 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 04:43:50,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 866 transitions. [2021-06-05 04:43:50,957 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 866 transitions. Word has length 20 [2021-06-05 04:43:50,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:50,957 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 866 transitions. [2021-06-05 04:43:50,958 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 04:43:50,958 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 866 transitions. [2021-06-05 04:43:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:50,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:50,958 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:51,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:51,158 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:51,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1167073391, now seen corresponding path program 394 times [2021-06-05 04:43:51,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:51,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487853604] [2021-06-05 04:43:51,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:51,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:51,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487853604] [2021-06-05 04:43:51,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487853604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:51,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452185113] [2021-06-05 04:43:51,224 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 04:43:51,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:51,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:51,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:51,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:51,421 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 04:43:51,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452185113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:51,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:51,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:51,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357807170] [2021-06-05 04:43:51,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:51,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:51,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:51,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:51,422 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 04:43:51,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:51,654 INFO L93 Difference]: Finished difference Result 424 states and 1191 transitions. [2021-06-05 04:43:51,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:51,654 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 04:43:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:51,655 INFO L225 Difference]: With dead ends: 424 [2021-06-05 04:43:51,655 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 04:43:51,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:51,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 04:43:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 302. [2021-06-05 04:43:51,658 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 04:43:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 893 transitions. [2021-06-05 04:43:51,658 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 893 transitions. Word has length 20 [2021-06-05 04:43:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:51,658 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 893 transitions. [2021-06-05 04:43:51,658 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 04:43:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 893 transitions. [2021-06-05 04:43:51,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:51,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:51,659 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:51,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-05 04:43:51,859 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:51,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:51,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1212469979, now seen corresponding path program 395 times [2021-06-05 04:43:51,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:51,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553445585] [2021-06-05 04:43:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:51,921 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 04:43:51,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:51,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553445585] [2021-06-05 04:43:51,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553445585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:51,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131887982] [2021-06-05 04:43:51,922 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 04:43:52,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:43:52,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:52,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:52,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:52,158 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 04:43:52,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131887982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:52,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:52,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:52,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986502163] [2021-06-05 04:43:52,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:52,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:52,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:52,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:52,159 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 04:43:52,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:52,475 INFO L93 Difference]: Finished difference Result 401 states and 1152 transitions. [2021-06-05 04:43:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:52,475 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 04:43:52,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:52,475 INFO L225 Difference]: With dead ends: 401 [2021-06-05 04:43:52,475 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 04:43:52,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 04:43:52,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 291. [2021-06-05 04:43:52,478 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 04:43:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 861 transitions. [2021-06-05 04:43:52,479 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 861 transitions. Word has length 20 [2021-06-05 04:43:52,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:52,479 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 861 transitions. [2021-06-05 04:43:52,479 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 04:43:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 861 transitions. [2021-06-05 04:43:52,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:52,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:52,479 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:52,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3606,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:52,695 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:52,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:52,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1109036289, now seen corresponding path program 396 times [2021-06-05 04:43:52,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:52,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810140804] [2021-06-05 04:43:52,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:52,763 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 04:43:52,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:52,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810140804] [2021-06-05 04:43:52,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810140804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:52,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931448710] [2021-06-05 04:43:52,763 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 04:43:52,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:43:52,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:52,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:52,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:52,986 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 04:43:52,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931448710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:52,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:52,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:52,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451087953] [2021-06-05 04:43:52,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:52,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:52,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:52,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:52,986 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 04:43:53,291 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 04:43:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:53,495 INFO L93 Difference]: Finished difference Result 341 states and 989 transitions. [2021-06-05 04:43:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:53,495 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 04:43:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:53,496 INFO L225 Difference]: With dead ends: 341 [2021-06-05 04:43:53,496 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 04:43:53,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 552.5ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 04:43:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 293. [2021-06-05 04:43:53,498 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 04:43:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 866 transitions. [2021-06-05 04:43:53,499 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 866 transitions. Word has length 20 [2021-06-05 04:43:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:53,499 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 866 transitions. [2021-06-05 04:43:53,499 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 04:43:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 866 transitions. [2021-06-05 04:43:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:53,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:53,499 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:53,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3617 [2021-06-05 04:43:53,709 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:53,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:53,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1860436727, now seen corresponding path program 397 times [2021-06-05 04:43:53,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:53,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624338678] [2021-06-05 04:43:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:53,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:53,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624338678] [2021-06-05 04:43:53,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624338678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:53,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261995515] [2021-06-05 04:43:53,804 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 04:43:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:53,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:53,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:54,066 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 04:43:54,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261995515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:54,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:54,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:54,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521726425] [2021-06-05 04:43:54,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:54,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:54,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:54,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:54,067 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 04:43:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:54,423 INFO L93 Difference]: Finished difference Result 366 states and 1041 transitions. [2021-06-05 04:43:54,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:54,424 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 04:43:54,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:54,424 INFO L225 Difference]: With dead ends: 366 [2021-06-05 04:43:54,424 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 04:43:54,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:43:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 04:43:54,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 303. [2021-06-05 04:43:54,427 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 04:43:54,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 893 transitions. [2021-06-05 04:43:54,428 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 893 transitions. Word has length 20 [2021-06-05 04:43:54,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:54,428 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 893 transitions. [2021-06-05 04:43:54,428 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 04:43:54,428 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 893 transitions. [2021-06-05 04:43:54,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:54,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:54,428 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 04:43:54,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3624,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:54,628 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:54,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:54,629 INFO L82 PathProgramCache]: Analyzing trace with hash -54987199, now seen corresponding path program 398 times [2021-06-05 04:43:54,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:54,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400604574] [2021-06-05 04:43:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:54,682 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 04:43:54,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:54,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400604574] [2021-06-05 04:43:54,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400604574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:54,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723797109] [2021-06-05 04:43:54,683 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 04:43:54,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:54,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:54,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:54,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:54,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723797109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:54,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:54,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:54,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085533923] [2021-06-05 04:43:54,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:54,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:54,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:54,900 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 04:43:55,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:55,185 INFO L93 Difference]: Finished difference Result 337 states and 987 transitions. [2021-06-05 04:43:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:55,186 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 04:43:55,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:55,186 INFO L225 Difference]: With dead ends: 337 [2021-06-05 04:43:55,186 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 04:43:55,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 04:43:55,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 290. [2021-06-05 04:43:55,189 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 04:43:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-06-05 04:43:55,189 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-06-05 04:43:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:55,189 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-06-05 04:43:55,189 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 04:43:55,189 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-06-05 04:43:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:55,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:55,190 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:55,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:55,390 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:55,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:55,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1294978849, now seen corresponding path program 399 times [2021-06-05 04:43:55,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:55,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577910805] [2021-06-05 04:43:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:55,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:55,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577910805] [2021-06-05 04:43:55,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577910805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:55,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031155469] [2021-06-05 04:43:55,447 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 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 04:43:55,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:43:55,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:55,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:55,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:55,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031155469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:55,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:55,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:55,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177633325] [2021-06-05 04:43:55,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:55,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:55,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:55,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:55,650 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 04:43:55,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:55,872 INFO L93 Difference]: Finished difference Result 414 states and 1189 transitions. [2021-06-05 04:43:55,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:55,873 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 04:43:55,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:55,873 INFO L225 Difference]: With dead ends: 414 [2021-06-05 04:43:55,873 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:43:55,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:43:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 300. [2021-06-05 04:43:55,876 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 04:43:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 901 transitions. [2021-06-05 04:43:55,877 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 901 transitions. Word has length 20 [2021-06-05 04:43:55,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:55,877 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 901 transitions. [2021-06-05 04:43:55,877 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 04:43:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 901 transitions. [2021-06-05 04:43:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:55,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:55,877 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 04:43:56,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3643,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:56,078 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:56,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:56,078 INFO L82 PathProgramCache]: Analyzing trace with hash -198928873, now seen corresponding path program 400 times [2021-06-05 04:43:56,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:56,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113917515] [2021-06-05 04:43:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:56,133 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 04:43:56,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:56,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113917515] [2021-06-05 04:43:56,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113917515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:56,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32042688] [2021-06-05 04:43:56,133 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 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 04:43:56,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:43:56,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:56,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:56,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:56,334 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 04:43:56,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32042688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:56,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:56,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:56,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163730832] [2021-06-05 04:43:56,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:56,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:56,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:56,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:56,335 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 04:43:56,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:56,537 INFO L93 Difference]: Finished difference Result 420 states and 1190 transitions. [2021-06-05 04:43:56,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:43:56,537 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 04:43:56,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:56,538 INFO L225 Difference]: With dead ends: 420 [2021-06-05 04:43:56,538 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 04:43:56,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:43:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 04:43:56,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 303. [2021-06-05 04:43:56,541 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 04:43:56,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-06-05 04:43:56,541 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-06-05 04:43:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:56,541 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-06-05 04:43:56,541 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 04:43:56,541 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-06-05 04:43:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:56,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:56,542 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:56,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3652,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:43:56,742 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2046379287, now seen corresponding path program 401 times [2021-06-05 04:43:56,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:56,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607245800] [2021-06-05 04:43:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:56,801 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 04:43:56,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:56,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607245800] [2021-06-05 04:43:56,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607245800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:56,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281992301] [2021-06-05 04:43:56,801 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 04:43:56,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:43:56,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:56,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:56,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:56,987 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 04:43:56,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281992301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:56,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:56,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:56,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653619496] [2021-06-05 04:43:56,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:56,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:56,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:56,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:56,988 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 04:43:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:57,261 INFO L93 Difference]: Finished difference Result 472 states and 1332 transitions. [2021-06-05 04:43:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:57,262 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 04:43:57,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:57,262 INFO L225 Difference]: With dead ends: 472 [2021-06-05 04:43:57,262 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 04:43:57,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 04:43:57,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 306. [2021-06-05 04:43:57,265 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 04:43:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 918 transitions. [2021-06-05 04:43:57,266 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 918 transitions. Word has length 20 [2021-06-05 04:43:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:57,266 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 918 transitions. [2021-06-05 04:43:57,266 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 04:43:57,266 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 918 transitions. [2021-06-05 04:43:57,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:57,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:57,266 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:57,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3661 [2021-06-05 04:43:57,467 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:57,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:57,467 INFO L82 PathProgramCache]: Analyzing trace with hash -956245609, now seen corresponding path program 402 times [2021-06-05 04:43:57,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:57,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369569170] [2021-06-05 04:43:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:57,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:57,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369569170] [2021-06-05 04:43:57,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369569170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:57,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185675159] [2021-06-05 04:43:57,526 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 04:43:57,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:43:57,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:57,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:57,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185675159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:57,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:57,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:57,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236938135] [2021-06-05 04:43:57,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:57,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:57,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:57,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:57,715 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 04:43:57,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:57,998 INFO L93 Difference]: Finished difference Result 435 states and 1250 transitions. [2021-06-05 04:43:57,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:57,998 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 04:43:57,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:57,999 INFO L225 Difference]: With dead ends: 435 [2021-06-05 04:43:57,999 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 04:43:57,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:43:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 04:43:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 303. [2021-06-05 04:43:58,002 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 04:43:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-06-05 04:43:58,002 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-06-05 04:43:58,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:58,002 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-06-05 04:43:58,002 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 04:43:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-06-05 04:43:58,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:58,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:58,003 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:43:58,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3671 [2021-06-05 04:43:58,203 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:58,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:58,203 INFO L82 PathProgramCache]: Analyzing trace with hash 2067115815, now seen corresponding path program 403 times [2021-06-05 04:43:58,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:58,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831307485] [2021-06-05 04:43:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:58,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:58,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831307485] [2021-06-05 04:43:58,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831307485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:58,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057217196] [2021-06-05 04:43:58,259 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 04:43:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:58,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:58,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:58,473 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 04:43:58,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057217196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:58,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:58,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:58,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705917404] [2021-06-05 04:43:58,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:58,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:58,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:58,474 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 04:43:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:58,768 INFO L93 Difference]: Finished difference Result 460 states and 1284 transitions. [2021-06-05 04:43:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:58,768 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 04:43:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:58,768 INFO L225 Difference]: With dead ends: 460 [2021-06-05 04:43:58,768 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 04:43:58,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 256.8ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:43:58,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 04:43:58,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 307. [2021-06-05 04:43:58,771 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 04:43:58,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 917 transitions. [2021-06-05 04:43:58,772 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 917 transitions. Word has length 20 [2021-06-05 04:43:58,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:58,772 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 917 transitions. [2021-06-05 04:43:58,772 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 04:43:58,772 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 917 transitions. [2021-06-05 04:43:58,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:58,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:58,772 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 04:43:58,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3681 [2021-06-05 04:43:58,973 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:58,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:58,973 INFO L82 PathProgramCache]: Analyzing trace with hash 151691889, now seen corresponding path program 404 times [2021-06-05 04:43:58,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:58,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549383164] [2021-06-05 04:43:58,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:59,030 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 04:43:59,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:59,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549383164] [2021-06-05 04:43:59,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549383164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:59,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802391518] [2021-06-05 04:43:59,031 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 04:43:59,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:43:59,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:59,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:59,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:59,237 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 04:43:59,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802391518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:59,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:59,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:59,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853655881] [2021-06-05 04:43:59,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:59,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:59,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:59,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:59,238 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 04:43:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:43:59,484 INFO L93 Difference]: Finished difference Result 443 states and 1266 transitions. [2021-06-05 04:43:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:43:59,485 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 04:43:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:43:59,485 INFO L225 Difference]: With dead ends: 443 [2021-06-05 04:43:59,485 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 04:43:59,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 258.7ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:43:59,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 04:43:59,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 304. [2021-06-05 04:43:59,488 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 04:43:59,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 907 transitions. [2021-06-05 04:43:59,489 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 907 transitions. Word has length 20 [2021-06-05 04:43:59,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:43:59,489 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 907 transitions. [2021-06-05 04:43:59,489 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 04:43:59,489 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 907 transitions. [2021-06-05 04:43:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:43:59,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:43:59,489 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 04:43:59,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3692 [2021-06-05 04:43:59,690 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:43:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:43:59,690 INFO L82 PathProgramCache]: Analyzing trace with hash -66049343, now seen corresponding path program 405 times [2021-06-05 04:43:59,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:43:59,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036293489] [2021-06-05 04:43:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:43:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:43:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:43:59,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:43:59,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036293489] [2021-06-05 04:43:59,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036293489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:59,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075679727] [2021-06-05 04:43:59,749 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 04:43:59,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:43:59,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:43:59,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:43:59,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:43:59,934 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 04:43:59,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075679727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:43:59,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:43:59,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:43:59,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135492320] [2021-06-05 04:43:59,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:43:59,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:43:59,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:43:59,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:43:59,935 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 04:44:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:00,124 INFO L93 Difference]: Finished difference Result 396 states and 1150 transitions. [2021-06-05 04:44:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:00,124 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 04:44:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:00,125 INFO L225 Difference]: With dead ends: 396 [2021-06-05 04:44:00,125 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 04:44:00,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 172.5ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 04:44:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 305. [2021-06-05 04:44:00,127 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 04:44:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 909 transitions. [2021-06-05 04:44:00,128 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 909 transitions. Word has length 20 [2021-06-05 04:44:00,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:00,128 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 909 transitions. [2021-06-05 04:44:00,128 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 04:44:00,128 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 909 transitions. [2021-06-05 04:44:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:00,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:00,128 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:00,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3701,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:00,329 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:00,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1226293057, now seen corresponding path program 406 times [2021-06-05 04:44:00,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:00,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091139150] [2021-06-05 04:44:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:00,397 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 04:44:00,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:00,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091139150] [2021-06-05 04:44:00,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091139150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:00,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919875045] [2021-06-05 04:44:00,397 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 04:44:00,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:00,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:00,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:00,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:00,588 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 04:44:00,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919875045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:00,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:00,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:00,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861916536] [2021-06-05 04:44:00,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:00,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:00,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:00,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:00,589 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 04:44:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:00,815 INFO L93 Difference]: Finished difference Result 384 states and 1117 transitions. [2021-06-05 04:44:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:00,815 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 04:44:00,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:00,816 INFO L225 Difference]: With dead ends: 384 [2021-06-05 04:44:00,816 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 04:44:00,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 04:44:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 294. [2021-06-05 04:44:00,819 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 04:44:00,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 872 transitions. [2021-06-05 04:44:00,819 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 872 transitions. Word has length 20 [2021-06-05 04:44:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:00,819 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 872 transitions. [2021-06-05 04:44:00,819 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 04:44:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 872 transitions. [2021-06-05 04:44:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:00,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:00,819 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:01,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3708 [2021-06-05 04:44:01,020 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:01,020 INFO L82 PathProgramCache]: Analyzing trace with hash -669571979, now seen corresponding path program 407 times [2021-06-05 04:44:01,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:01,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14089340] [2021-06-05 04:44:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:01,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:01,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14089340] [2021-06-05 04:44:01,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14089340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:01,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626702064] [2021-06-05 04:44:01,077 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 04:44:01,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:01,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:01,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:01,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:01,258 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 04:44:01,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626702064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:01,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:01,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:01,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787292232] [2021-06-05 04:44:01,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:01,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:01,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:01,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:01,259 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 04:44:01,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:01,437 INFO L93 Difference]: Finished difference Result 339 states and 995 transitions. [2021-06-05 04:44:01,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:01,438 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 04:44:01,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:01,438 INFO L225 Difference]: With dead ends: 339 [2021-06-05 04:44:01,438 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 04:44:01,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 04:44:01,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 291. [2021-06-05 04:44:01,442 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 04:44:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 860 transitions. [2021-06-05 04:44:01,442 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 860 transitions. Word has length 20 [2021-06-05 04:44:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:01,442 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 860 transitions. [2021-06-05 04:44:01,442 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 04:44:01,442 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 860 transitions. [2021-06-05 04:44:01,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:01,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:01,443 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:01,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3719 [2021-06-05 04:44:01,643 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:01,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:01,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1312769993, now seen corresponding path program 408 times [2021-06-05 04:44:01,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:01,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023212989] [2021-06-05 04:44:01,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:01,696 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 04:44:01,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:01,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023212989] [2021-06-05 04:44:01,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023212989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:01,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922071035] [2021-06-05 04:44:01,697 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 04:44:01,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:44:01,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:01,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:01,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:01,886 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 04:44:01,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922071035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:01,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:01,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:01,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220035040] [2021-06-05 04:44:01,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:01,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:01,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:01,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:01,887 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 04:44:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:02,081 INFO L93 Difference]: Finished difference Result 384 states and 1089 transitions. [2021-06-05 04:44:02,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:02,081 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 04:44:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:02,082 INFO L225 Difference]: With dead ends: 384 [2021-06-05 04:44:02,082 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 04:44:02,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 04:44:02,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 305. [2021-06-05 04:44:02,085 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 04:44:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 899 transitions. [2021-06-05 04:44:02,085 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 899 transitions. Word has length 20 [2021-06-05 04:44:02,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:02,085 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 899 transitions. [2021-06-05 04:44:02,085 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 04:44:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 899 transitions. [2021-06-05 04:44:02,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:02,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:02,086 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:02,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3724,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:02,286 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:02,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:02,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1066773377, now seen corresponding path program 409 times [2021-06-05 04:44:02,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:02,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351796376] [2021-06-05 04:44:02,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:02,341 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 04:44:02,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:02,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351796376] [2021-06-05 04:44:02,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351796376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:02,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839009480] [2021-06-05 04:44:02,341 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 04:44:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:02,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:02,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:02,529 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 04:44:02,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839009480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:02,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:02,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:02,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131040830] [2021-06-05 04:44:02,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:02,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:02,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:02,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:02,530 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 04:44:02,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:02,758 INFO L93 Difference]: Finished difference Result 390 states and 1110 transitions. [2021-06-05 04:44:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:02,758 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 04:44:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:02,758 INFO L225 Difference]: With dead ends: 390 [2021-06-05 04:44:02,758 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 04:44:02,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 206.8ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 04:44:02,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 303. [2021-06-05 04:44:02,761 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 04:44:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 894 transitions. [2021-06-05 04:44:02,762 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 894 transitions. Word has length 20 [2021-06-05 04:44:02,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:02,762 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 894 transitions. [2021-06-05 04:44:02,762 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 04:44:02,762 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 894 transitions. [2021-06-05 04:44:02,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:02,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:02,762 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:02,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3734 [2021-06-05 04:44:02,963 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:02,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:02,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2107009175, now seen corresponding path program 410 times [2021-06-05 04:44:02,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:02,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591103302] [2021-06-05 04:44:02,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:03,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:03,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591103302] [2021-06-05 04:44:03,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591103302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:03,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104685780] [2021-06-05 04:44:03,018 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 04:44:03,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:03,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:03,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:03,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:03,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104685780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:03,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:03,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:03,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58251827] [2021-06-05 04:44:03,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:03,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:03,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:03,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:03,218 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 04:44:03,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:03,437 INFO L93 Difference]: Finished difference Result 359 states and 1045 transitions. [2021-06-05 04:44:03,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:03,438 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 04:44:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:03,438 INFO L225 Difference]: With dead ends: 359 [2021-06-05 04:44:03,438 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 04:44:03,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 04:44:03,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 290. [2021-06-05 04:44:03,441 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 04:44:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-06-05 04:44:03,441 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-06-05 04:44:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:03,441 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-06-05 04:44:03,441 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 04:44:03,441 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-06-05 04:44:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:03,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:03,442 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:03,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3744,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:03,642 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash -588208655, now seen corresponding path program 411 times [2021-06-05 04:44:03,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:03,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556515669] [2021-06-05 04:44:03,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:03,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:03,689 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 04:44:03,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:03,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556515669] [2021-06-05 04:44:03,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556515669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:03,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715809781] [2021-06-05 04:44:03,690 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 04:44:03,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:44:03,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:03,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:03,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:03,875 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 04:44:03,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715809781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:03,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:03,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:44:03,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753569291] [2021-06-05 04:44:03,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:44:03,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:03,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:44:03,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:03,876 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 04:44:04,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:04,128 INFO L93 Difference]: Finished difference Result 331 states and 961 transitions. [2021-06-05 04:44:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:04,128 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 04:44:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:04,129 INFO L225 Difference]: With dead ends: 331 [2021-06-05 04:44:04,129 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 04:44:04,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:04,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 04:44:04,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 294. [2021-06-05 04:44:04,131 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 04:44:04,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-06-05 04:44:04,132 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-06-05 04:44:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:04,132 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-06-05 04:44:04,132 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 04:44:04,132 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-06-05 04:44:04,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:04,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:04,132 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:04,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3753 [2021-06-05 04:44:04,333 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:04,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:04,333 INFO L82 PathProgramCache]: Analyzing trace with hash 163191783, now seen corresponding path program 412 times [2021-06-05 04:44:04,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:04,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379372607] [2021-06-05 04:44:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:04,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:04,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379372607] [2021-06-05 04:44:04,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379372607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:04,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441814919] [2021-06-05 04:44:04,381 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 04:44:04,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:04,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:04,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:04,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:04,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441814919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:04,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:04,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:44:04,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242978436] [2021-06-05 04:44:04,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:44:04,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:04,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:44:04,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:04,570 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 04:44:04,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:04,826 INFO L93 Difference]: Finished difference Result 356 states and 1013 transitions. [2021-06-05 04:44:04,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:04,826 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 04:44:04,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:04,826 INFO L225 Difference]: With dead ends: 356 [2021-06-05 04:44:04,826 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 04:44:04,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 04:44:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 304. [2021-06-05 04:44:04,829 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 04:44:04,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 893 transitions. [2021-06-05 04:44:04,830 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 893 transitions. Word has length 20 [2021-06-05 04:44:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:04,830 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 893 transitions. [2021-06-05 04:44:04,830 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 04:44:04,830 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 893 transitions. [2021-06-05 04:44:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:04,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:04,830 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 04:44:05,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3760 [2021-06-05 04:44:05,031 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:05,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:05,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1752232143, now seen corresponding path program 413 times [2021-06-05 04:44:05,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:05,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363483637] [2021-06-05 04:44:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:05,087 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 04:44:05,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:05,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363483637] [2021-06-05 04:44:05,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363483637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:05,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953722702] [2021-06-05 04:44:05,087 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 04:44:05,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:44:05,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:05,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:05,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:05,272 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 04:44:05,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953722702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:05,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:05,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:44:05,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151787986] [2021-06-05 04:44:05,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:44:05,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:44:05,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:05,273 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 04:44:05,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:05,521 INFO L93 Difference]: Finished difference Result 327 states and 959 transitions. [2021-06-05 04:44:05,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:05,522 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 04:44:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:05,522 INFO L225 Difference]: With dead ends: 327 [2021-06-05 04:44:05,522 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 04:44:05,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:05,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 04:44:05,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2021-06-05 04:44:05,525 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 04:44:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-06-05 04:44:05,525 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-06-05 04:44:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:05,525 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-06-05 04:44:05,525 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 04:44:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-06-05 04:44:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:05,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:05,526 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:05,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3767,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:05,742 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:05,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:05,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1949236847, now seen corresponding path program 414 times [2021-06-05 04:44:05,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:05,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071177655] [2021-06-05 04:44:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:05,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:05,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:05,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071177655] [2021-06-05 04:44:05,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071177655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:05,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220929718] [2021-06-05 04:44:05,791 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 04:44:05,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:44:05,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:05,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:05,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:05,966 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 04:44:05,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220929718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:05,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:05,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:44:05,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511920791] [2021-06-05 04:44:05,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:44:05,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:05,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:44:05,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:05,967 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 04:44:06,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:06,136 INFO L93 Difference]: Finished difference Result 362 states and 1028 transitions. [2021-06-05 04:44:06,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:06,137 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 04:44:06,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:06,137 INFO L225 Difference]: With dead ends: 362 [2021-06-05 04:44:06,137 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 04:44:06,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 04:44:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 306. [2021-06-05 04:44:06,140 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 04:44:06,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 900 transitions. [2021-06-05 04:44:06,141 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 900 transitions. Word has length 20 [2021-06-05 04:44:06,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:06,141 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 900 transitions. [2021-06-05 04:44:06,141 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 04:44:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 900 transitions. [2021-06-05 04:44:06,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:06,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:06,141 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 04:44:06,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3772,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:06,357 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:06,357 INFO L82 PathProgramCache]: Analyzing trace with hash 430306523, now seen corresponding path program 415 times [2021-06-05 04:44:06,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:06,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955284619] [2021-06-05 04:44:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:06,417 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 04:44:06,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:06,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955284619] [2021-06-05 04:44:06,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955284619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:06,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792190649] [2021-06-05 04:44:06,418 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 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 04:44:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:06,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:06,603 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 04:44:06,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792190649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:06,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:06,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:44:06,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115527173] [2021-06-05 04:44:06,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:44:06,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:06,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:44:06,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:06,604 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 04:44:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:06,788 INFO L93 Difference]: Finished difference Result 362 states and 1034 transitions. [2021-06-05 04:44:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:06,788 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 04:44:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:06,788 INFO L225 Difference]: With dead ends: 362 [2021-06-05 04:44:06,789 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 04:44:06,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:06,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 04:44:06,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 304. [2021-06-05 04:44:06,791 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 04:44:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 895 transitions. [2021-06-05 04:44:06,792 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 895 transitions. Word has length 20 [2021-06-05 04:44:06,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:06,792 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 895 transitions. [2021-06-05 04:44:06,792 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 04:44:06,792 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 895 transitions. [2021-06-05 04:44:06,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:06,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:06,792 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 04:44:07,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3776,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:07,001 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:07,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:07,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1470542321, now seen corresponding path program 416 times [2021-06-05 04:44:07,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:07,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89845495] [2021-06-05 04:44:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:07,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:07,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89845495] [2021-06-05 04:44:07,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89845495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:07,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631997021] [2021-06-05 04:44:07,063 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 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 04:44:07,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:07,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:07,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:07,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:07,239 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 04:44:07,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631997021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:07,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:07,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:44:07,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471689697] [2021-06-05 04:44:07,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:44:07,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:07,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:44:07,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:07,239 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 04:44:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:07,429 INFO L93 Difference]: Finished difference Result 337 states and 984 transitions. [2021-06-05 04:44:07,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:07,430 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 04:44:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:07,430 INFO L225 Difference]: With dead ends: 337 [2021-06-05 04:44:07,430 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 04:44:07,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:44:07,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 04:44:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 289. [2021-06-05 04:44:07,433 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 04:44:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2021-06-05 04:44:07,433 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2021-06-05 04:44:07,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:07,433 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2021-06-05 04:44:07,433 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 04:44:07,433 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2021-06-05 04:44:07,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:07,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:07,434 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 04:44:07,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3781 [2021-06-05 04:44:07,650 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:07,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:07,650 INFO L82 PathProgramCache]: Analyzing trace with hash 488739565, now seen corresponding path program 417 times [2021-06-05 04:44:07,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:07,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807557077] [2021-06-05 04:44:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:07,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:07,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807557077] [2021-06-05 04:44:07,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807557077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:07,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787021174] [2021-06-05 04:44:07,709 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 04:44:07,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:44:07,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:07,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:07,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:07,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787021174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:07,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:07,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:07,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568310885] [2021-06-05 04:44:07,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:07,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:07,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:07,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:07,897 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 04:44:08,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:08,132 INFO L93 Difference]: Finished difference Result 514 states and 1479 transitions. [2021-06-05 04:44:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:08,132 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 04:44:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:08,133 INFO L225 Difference]: With dead ends: 514 [2021-06-05 04:44:08,133 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 04:44:08,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 04:44:08,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 301. [2021-06-05 04:44:08,136 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 04:44:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 906 transitions. [2021-06-05 04:44:08,136 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 906 transitions. Word has length 20 [2021-06-05 04:44:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:08,136 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 906 transitions. [2021-06-05 04:44:08,136 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 04:44:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 906 transitions. [2021-06-05 04:44:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:08,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:08,137 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 04:44:08,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:08,337 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:08,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1005168157, now seen corresponding path program 418 times [2021-06-05 04:44:08,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:08,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454211086] [2021-06-05 04:44:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:08,395 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 04:44:08,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:08,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454211086] [2021-06-05 04:44:08,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454211086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:08,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092993148] [2021-06-05 04:44:08,396 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 04:44:08,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:08,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:08,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:08,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:08,583 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 04:44:08,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092993148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:08,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:08,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:08,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808572839] [2021-06-05 04:44:08,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:08,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:08,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:08,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:08,584 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 04:44:08,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:08,758 INFO L93 Difference]: Finished difference Result 520 states and 1480 transitions. [2021-06-05 04:44:08,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:08,758 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 04:44:08,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:08,759 INFO L225 Difference]: With dead ends: 520 [2021-06-05 04:44:08,759 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 04:44:08,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:08,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 04:44:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 304. [2021-06-05 04:44:08,762 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 04:44:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2021-06-05 04:44:08,763 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2021-06-05 04:44:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:08,763 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2021-06-05 04:44:08,763 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 04:44:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2021-06-05 04:44:08,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:08,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:08,763 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 04:44:08,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3793 [2021-06-05 04:44:08,963 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:08,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:08,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1240140003, now seen corresponding path program 419 times [2021-06-05 04:44:08,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:08,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834962888] [2021-06-05 04:44:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:09,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:09,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834962888] [2021-06-05 04:44:09,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834962888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:09,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268983594] [2021-06-05 04:44:09,027 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 04:44:09,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:44:09,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:09,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:09,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:09,234 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 04:44:09,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268983594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:09,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:09,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:09,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300728759] [2021-06-05 04:44:09,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:09,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:09,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:09,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:09,234 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 04:44:09,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:09,573 INFO L93 Difference]: Finished difference Result 572 states and 1622 transitions. [2021-06-05 04:44:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:09,573 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 04:44:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:09,574 INFO L225 Difference]: With dead ends: 572 [2021-06-05 04:44:09,574 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 04:44:09,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 04:44:09,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 307. [2021-06-05 04:44:09,577 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 04:44:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 923 transitions. [2021-06-05 04:44:09,578 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 923 transitions. Word has length 20 [2021-06-05 04:44:09,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:09,578 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 923 transitions. [2021-06-05 04:44:09,578 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 04:44:09,578 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 923 transitions. [2021-06-05 04:44:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:09,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:09,578 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 04:44:09,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3802,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:09,779 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1762484893, now seen corresponding path program 420 times [2021-06-05 04:44:09,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:09,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184484976] [2021-06-05 04:44:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:09,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:09,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184484976] [2021-06-05 04:44:09,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184484976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:09,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368562532] [2021-06-05 04:44:09,840 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 04:44:09,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:44:09,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:10,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368562532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:10,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:10,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:10,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753794680] [2021-06-05 04:44:10,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:10,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:10,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:10,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:10,044 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 04:44:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:10,362 INFO L93 Difference]: Finished difference Result 535 states and 1540 transitions. [2021-06-05 04:44:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:10,363 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 04:44:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:10,363 INFO L225 Difference]: With dead ends: 535 [2021-06-05 04:44:10,363 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 04:44:10,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 286.8ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 04:44:10,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 304. [2021-06-05 04:44:10,367 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 04:44:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 908 transitions. [2021-06-05 04:44:10,367 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 908 transitions. Word has length 20 [2021-06-05 04:44:10,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:10,367 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 908 transitions. [2021-06-05 04:44:10,367 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 04:44:10,367 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 908 transitions. [2021-06-05 04:44:10,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:10,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:10,368 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:10,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3813 [2021-06-05 04:44:10,568 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:10,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:10,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1260876531, now seen corresponding path program 421 times [2021-06-05 04:44:10,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:10,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29938990] [2021-06-05 04:44:10,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:10,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:10,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29938990] [2021-06-05 04:44:10,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29938990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:10,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077406508] [2021-06-05 04:44:10,626 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 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 04:44:10,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:10,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:10,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:10,811 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 04:44:10,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077406508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:10,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:10,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:10,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196254565] [2021-06-05 04:44:10,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:10,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:10,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:10,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:10,811 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 04:44:11,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:11,125 INFO L93 Difference]: Finished difference Result 560 states and 1574 transitions. [2021-06-05 04:44:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:11,125 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 04:44:11,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:11,126 INFO L225 Difference]: With dead ends: 560 [2021-06-05 04:44:11,126 INFO L226 Difference]: Without dead ends: 554 [2021-06-05 04:44:11,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 273.4ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-05 04:44:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 308. [2021-06-05 04:44:11,129 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 04:44:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 922 transitions. [2021-06-05 04:44:11,129 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 922 transitions. Word has length 20 [2021-06-05 04:44:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:11,129 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 922 transitions. [2021-06-05 04:44:11,129 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 04:44:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 922 transitions. [2021-06-05 04:44:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:11,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:11,130 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:11,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3822,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:11,330 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash -654547395, now seen corresponding path program 422 times [2021-06-05 04:44:11,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:11,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203877759] [2021-06-05 04:44:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:11,390 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 04:44:11,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:11,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203877759] [2021-06-05 04:44:11,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203877759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:11,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648857617] [2021-06-05 04:44:11,390 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 04:44:11,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:11,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:11,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:11,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:11,592 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 04:44:11,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648857617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:11,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:11,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:11,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174511288] [2021-06-05 04:44:11,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:11,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:11,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:11,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:11,593 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 04:44:11,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:11,929 INFO L93 Difference]: Finished difference Result 543 states and 1556 transitions. [2021-06-05 04:44:11,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:11,930 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 04:44:11,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:11,930 INFO L225 Difference]: With dead ends: 543 [2021-06-05 04:44:11,930 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 04:44:11,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 310.3ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:11,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 04:44:11,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 305. [2021-06-05 04:44:11,934 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 04:44:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2021-06-05 04:44:11,934 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2021-06-05 04:44:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:11,934 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2021-06-05 04:44:11,934 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 04:44:11,934 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2021-06-05 04:44:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:11,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:11,935 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:12,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3832,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:12,135 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:12,135 INFO L82 PathProgramCache]: Analyzing trace with hash -872288627, now seen corresponding path program 423 times [2021-06-05 04:44:12,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:12,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370940121] [2021-06-05 04:44:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:12,191 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 04:44:12,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:12,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370940121] [2021-06-05 04:44:12,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370940121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:12,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353377843] [2021-06-05 04:44:12,191 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 04:44:12,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:44:12,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:12,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:12,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:12,393 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 04:44:12,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353377843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:12,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:12,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:12,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388840770] [2021-06-05 04:44:12,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:12,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:12,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:12,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:12,394 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 04:44:12,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:12,608 INFO L93 Difference]: Finished difference Result 517 states and 1509 transitions. [2021-06-05 04:44:12,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:12,608 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 04:44:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:12,609 INFO L225 Difference]: With dead ends: 517 [2021-06-05 04:44:12,609 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 04:44:12,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 04:44:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 311. [2021-06-05 04:44:12,612 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 04:44:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 939 transitions. [2021-06-05 04:44:12,613 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 939 transitions. Word has length 20 [2021-06-05 04:44:12,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:12,613 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 939 transitions. [2021-06-05 04:44:12,613 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 04:44:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 939 transitions. [2021-06-05 04:44:12,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:12,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:12,613 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 04:44:12,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3842,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:12,814 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:12,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:12,814 INFO L82 PathProgramCache]: Analyzing trace with hash 420053773, now seen corresponding path program 424 times [2021-06-05 04:44:12,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:12,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946652736] [2021-06-05 04:44:12,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:12,874 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 04:44:12,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:12,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946652736] [2021-06-05 04:44:12,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946652736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:12,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957703291] [2021-06-05 04:44:12,875 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 04:44:12,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:12,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:12,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:12,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:13,060 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 04:44:13,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957703291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:13,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:13,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:13,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829496205] [2021-06-05 04:44:13,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:13,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:13,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:13,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:13,061 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 04:44:13,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:13,307 INFO L93 Difference]: Finished difference Result 505 states and 1476 transitions. [2021-06-05 04:44:13,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:13,307 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 04:44:13,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:13,308 INFO L225 Difference]: With dead ends: 505 [2021-06-05 04:44:13,308 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 04:44:13,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 04:44:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 308. [2021-06-05 04:44:13,311 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 04:44:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 924 transitions. [2021-06-05 04:44:13,312 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 924 transitions. Word has length 20 [2021-06-05 04:44:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:13,312 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 924 transitions. [2021-06-05 04:44:13,312 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 04:44:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 924 transitions. [2021-06-05 04:44:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:13,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:13,312 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:13,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3850,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:13,513 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1475811263, now seen corresponding path program 425 times [2021-06-05 04:44:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:13,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713861092] [2021-06-05 04:44:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:13,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:13,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713861092] [2021-06-05 04:44:13,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713861092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:13,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630357050] [2021-06-05 04:44:13,573 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 04:44:13,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:13,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:13,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:13,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:13,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630357050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:13,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:13,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:13,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661571369] [2021-06-05 04:44:13,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:13,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:13,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:13,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:13,775 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 04:44:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:13,972 INFO L93 Difference]: Finished difference Result 460 states and 1354 transitions. [2021-06-05 04:44:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:13,972 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 04:44:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:13,973 INFO L225 Difference]: With dead ends: 460 [2021-06-05 04:44:13,973 INFO L226 Difference]: Without dead ends: 460 [2021-06-05 04:44:13,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-05 04:44:13,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 305. [2021-06-05 04:44:13,979 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 04:44:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 912 transitions. [2021-06-05 04:44:13,980 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 912 transitions. Word has length 20 [2021-06-05 04:44:13,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:13,980 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 912 transitions. [2021-06-05 04:44:13,980 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 04:44:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 912 transitions. [2021-06-05 04:44:13,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:13,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:13,981 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 04:44:14,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3859,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:14,185 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:14,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2119009277, now seen corresponding path program 426 times [2021-06-05 04:44:14,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:14,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727476610] [2021-06-05 04:44:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:14,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:14,242 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 04:44:14,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:14,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727476610] [2021-06-05 04:44:14,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727476610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:14,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377370493] [2021-06-05 04:44:14,242 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 04:44:14,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:44:14,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:14,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:14,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:14,429 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 04:44:14,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377370493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:14,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:14,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:14,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214042980] [2021-06-05 04:44:14,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:14,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:14,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:14,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:14,429 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 04:44:14,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:14,607 INFO L93 Difference]: Finished difference Result 499 states and 1433 transitions. [2021-06-05 04:44:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:14,608 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 04:44:14,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:14,608 INFO L225 Difference]: With dead ends: 499 [2021-06-05 04:44:14,608 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 04:44:14,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:14,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 04:44:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 313. [2021-06-05 04:44:14,612 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 04:44:14,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 938 transitions. [2021-06-05 04:44:14,612 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 938 transitions. Word has length 20 [2021-06-05 04:44:14,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:14,612 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 938 transitions. [2021-06-05 04:44:14,612 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 04:44:14,612 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 938 transitions. [2021-06-05 04:44:14,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:14,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:14,613 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 04:44:14,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3864,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:14,813 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:14,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:14,813 INFO L82 PathProgramCache]: Analyzing trace with hash 260534093, now seen corresponding path program 427 times [2021-06-05 04:44:14,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:14,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313796807] [2021-06-05 04:44:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:14,871 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 04:44:14,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:14,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313796807] [2021-06-05 04:44:14,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313796807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:14,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473901499] [2021-06-05 04:44:14,871 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 04:44:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:14,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:14,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:15,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473901499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:15,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:15,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:15,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394590680] [2021-06-05 04:44:15,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:15,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:15,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:15,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:15,059 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 04:44:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:15,310 INFO L93 Difference]: Finished difference Result 505 states and 1454 transitions. [2021-06-05 04:44:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:15,311 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 04:44:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:15,311 INFO L225 Difference]: With dead ends: 505 [2021-06-05 04:44:15,311 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 04:44:15,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 04:44:15,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 309. [2021-06-05 04:44:15,315 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 04:44:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-06-05 04:44:15,315 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-06-05 04:44:15,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:15,315 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-06-05 04:44:15,315 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 04:44:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-06-05 04:44:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:15,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:15,316 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:15,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3873,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:15,516 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:15,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:15,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1300769891, now seen corresponding path program 428 times [2021-06-05 04:44:15,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:15,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173254527] [2021-06-05 04:44:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:15,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:15,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173254527] [2021-06-05 04:44:15,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173254527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:15,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801054070] [2021-06-05 04:44:15,574 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 04:44:15,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:15,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:15,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:15,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:15,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801054070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:15,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:15,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:15,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684673645] [2021-06-05 04:44:15,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:15,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:15,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:15,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:15,769 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 04:44:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:15,967 INFO L93 Difference]: Finished difference Result 480 states and 1404 transitions. [2021-06-05 04:44:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:15,968 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 04:44:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:15,968 INFO L225 Difference]: With dead ends: 480 [2021-06-05 04:44:15,968 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 04:44:15,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:15,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 04:44:15,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 306. [2021-06-05 04:44:15,971 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 04:44:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 915 transitions. [2021-06-05 04:44:15,972 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 915 transitions. Word has length 20 [2021-06-05 04:44:15,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:15,972 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 915 transitions. [2021-06-05 04:44:15,972 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 04:44:15,972 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 915 transitions. [2021-06-05 04:44:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:15,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:15,972 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:16,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3883,431 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:16,173 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:16,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:16,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2145222335, now seen corresponding path program 429 times [2021-06-05 04:44:16,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:16,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627528758] [2021-06-05 04:44:16,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:16,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627528758] [2021-06-05 04:44:16,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627528758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:16,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451197449] [2021-06-05 04:44:16,231 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 04:44:16,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:44:16,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:16,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:16,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:16,427 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 04:44:16,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451197449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:16,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:16,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:16,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180380893] [2021-06-05 04:44:16,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:16,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:16,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:16,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:16,428 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 04:44:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:16,622 INFO L93 Difference]: Finished difference Result 504 states and 1465 transitions. [2021-06-05 04:44:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:16,622 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 04:44:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:16,623 INFO L225 Difference]: With dead ends: 504 [2021-06-05 04:44:16,623 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 04:44:16,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 04:44:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 309. [2021-06-05 04:44:16,626 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 04:44:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 924 transitions. [2021-06-05 04:44:16,627 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 924 transitions. Word has length 20 [2021-06-05 04:44:16,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:16,627 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 924 transitions. [2021-06-05 04:44:16,627 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 04:44:16,627 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 924 transitions. [2021-06-05 04:44:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:16,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:16,627 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 04:44:16,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3889,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:16,828 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:16,828 INFO L82 PathProgramCache]: Analyzing trace with hash -852879935, now seen corresponding path program 430 times [2021-06-05 04:44:16,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:16,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528522485] [2021-06-05 04:44:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:16,885 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 04:44:16,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:16,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528522485] [2021-06-05 04:44:16,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528522485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:16,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852192946] [2021-06-05 04:44:16,886 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 04:44:16,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:16,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:16,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:17,070 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 04:44:17,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852192946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:17,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:17,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:17,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168519046] [2021-06-05 04:44:17,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:17,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:17,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:17,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:17,071 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 04:44:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:17,291 INFO L93 Difference]: Finished difference Result 506 states and 1469 transitions. [2021-06-05 04:44:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:17,291 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 04:44:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:17,292 INFO L225 Difference]: With dead ends: 506 [2021-06-05 04:44:17,292 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 04:44:17,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:17,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 04:44:17,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 306. [2021-06-05 04:44:17,295 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 04:44:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 909 transitions. [2021-06-05 04:44:17,295 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 909 transitions. Word has length 20 [2021-06-05 04:44:17,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:17,296 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 909 transitions. [2021-06-05 04:44:17,296 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 04:44:17,296 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 909 transitions. [2021-06-05 04:44:17,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:17,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:17,296 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:17,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:17,496 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:17,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1546222325, now seen corresponding path program 431 times [2021-06-05 04:44:17,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:17,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607328580] [2021-06-05 04:44:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:17,552 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 04:44:17,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:17,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607328580] [2021-06-05 04:44:17,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607328580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:17,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663118159] [2021-06-05 04:44:17,553 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 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 04:44:17,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:17,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:17,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:17,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:17,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663118159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:17,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:17,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:17,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758911435] [2021-06-05 04:44:17,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:17,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:17,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:17,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:17,769 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 04:44:17,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:17,954 INFO L93 Difference]: Finished difference Result 451 states and 1318 transitions. [2021-06-05 04:44:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:17,954 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 04:44:17,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:17,954 INFO L225 Difference]: With dead ends: 451 [2021-06-05 04:44:17,954 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 04:44:17,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 04:44:17,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 293. [2021-06-05 04:44:17,957 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 04:44:17,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 868 transitions. [2021-06-05 04:44:17,958 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 868 transitions. Word has length 20 [2021-06-05 04:44:17,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:17,958 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 868 transitions. [2021-06-05 04:44:17,958 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 04:44:17,958 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 868 transitions. [2021-06-05 04:44:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:17,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:17,958 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:18,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3904,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:18,159 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1487908445, now seen corresponding path program 432 times [2021-06-05 04:44:18,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:18,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151214073] [2021-06-05 04:44:18,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:18,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:18,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:18,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151214073] [2021-06-05 04:44:18,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151214073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:18,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791082925] [2021-06-05 04:44:18,210 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 04:44:18,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:44:18,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:18,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:18,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:18,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791082925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:18,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:18,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:44:18,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63579868] [2021-06-05 04:44:18,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:44:18,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:18,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:44:18,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:18,378 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 04:44:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:18,554 INFO L93 Difference]: Finished difference Result 474 states and 1360 transitions. [2021-06-05 04:44:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:18,555 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 04:44:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:18,555 INFO L225 Difference]: With dead ends: 474 [2021-06-05 04:44:18,555 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 04:44:18,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 04:44:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 290. [2021-06-05 04:44:18,558 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 04:44:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 856 transitions. [2021-06-05 04:44:18,559 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 856 transitions. Word has length 20 [2021-06-05 04:44:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:18,559 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 856 transitions. [2021-06-05 04:44:18,559 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 04:44:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 856 transitions. [2021-06-05 04:44:18,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:18,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:18,559 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 04:44:18,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3909,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:18,759 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:18,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:18,760 INFO L82 PathProgramCache]: Analyzing trace with hash 266557457, now seen corresponding path program 433 times [2021-06-05 04:44:18,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:18,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208511348] [2021-06-05 04:44:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:18,815 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 04:44:18,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:18,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208511348] [2021-06-05 04:44:18,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208511348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:18,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111542544] [2021-06-05 04:44:18,815 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 04:44:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:18,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:18,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:18,987 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 04:44:18,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111542544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:18,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:18,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:44:18,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16191619] [2021-06-05 04:44:18,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:44:18,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:18,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:44:18,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:18,988 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 04:44:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:19,171 INFO L93 Difference]: Finished difference Result 539 states and 1504 transitions. [2021-06-05 04:44:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:19,171 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 04:44:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:19,172 INFO L225 Difference]: With dead ends: 539 [2021-06-05 04:44:19,172 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 04:44:19,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:19,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 04:44:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 308. [2021-06-05 04:44:19,175 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 04:44:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2021-06-05 04:44:19,175 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2021-06-05 04:44:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:19,175 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2021-06-05 04:44:19,175 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 04:44:19,175 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2021-06-05 04:44:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:19,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:19,176 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:19,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3915,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:19,376 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:19,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1648866469, now seen corresponding path program 434 times [2021-06-05 04:44:19,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:19,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171446844] [2021-06-05 04:44:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:19,429 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 04:44:19,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:19,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171446844] [2021-06-05 04:44:19,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171446844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:19,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627483091] [2021-06-05 04:44:19,430 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 04:44:19,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:19,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:19,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:19,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:19,614 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 04:44:19,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627483091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:19,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:19,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:44:19,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873196912] [2021-06-05 04:44:19,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:44:19,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:44:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:19,615 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 04:44:19,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:19,848 INFO L93 Difference]: Finished difference Result 545 states and 1525 transitions. [2021-06-05 04:44:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:19,849 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 04:44:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:19,849 INFO L225 Difference]: With dead ends: 545 [2021-06-05 04:44:19,849 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 04:44:19,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 237.8ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 04:44:19,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 306. [2021-06-05 04:44:19,853 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 04:44:19,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 902 transitions. [2021-06-05 04:44:19,853 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 902 transitions. Word has length 20 [2021-06-05 04:44:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:19,853 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 902 transitions. [2021-06-05 04:44:19,853 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 04:44:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 902 transitions. [2021-06-05 04:44:19,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:19,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:19,854 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 04:44:20,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3925,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:20,054 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:20,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:20,054 INFO L82 PathProgramCache]: Analyzing trace with hash -608630671, now seen corresponding path program 435 times [2021-06-05 04:44:20,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:20,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202974318] [2021-06-05 04:44:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:20,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:20,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:20,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202974318] [2021-06-05 04:44:20,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202974318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:20,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584034796] [2021-06-05 04:44:20,107 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 04:44:20,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:44:20,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:20,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:20,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:20,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:20,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584034796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:20,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:20,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:44:20,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433293829] [2021-06-05 04:44:20,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:44:20,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:20,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:44:20,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:44:20,314 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 04:44:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:20,514 INFO L93 Difference]: Finished difference Result 528 states and 1497 transitions. [2021-06-05 04:44:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:20,514 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 04:44:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:20,515 INFO L225 Difference]: With dead ends: 528 [2021-06-05 04:44:20,515 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 04:44:20,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:44:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 04:44:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 304. [2021-06-05 04:44:20,518 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 04:44:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 897 transitions. [2021-06-05 04:44:20,519 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 897 transitions. Word has length 20 [2021-06-05 04:44:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:20,519 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 897 transitions. [2021-06-05 04:44:20,519 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 04:44:20,519 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 897 transitions. [2021-06-05 04:44:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:20,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:20,519 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 04:44:20,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3933 [2021-06-05 04:44:20,720 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:20,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1151422269, now seen corresponding path program 436 times [2021-06-05 04:44:20,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:20,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868117963] [2021-06-05 04:44:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:20,774 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 04:44:20,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:20,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868117963] [2021-06-05 04:44:20,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868117963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:20,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915806187] [2021-06-05 04:44:20,775 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 04:44:20,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:20,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:20,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:20,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915806187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:20,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:20,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:44:20,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337314161] [2021-06-05 04:44:20,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:20,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:20,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:20,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:20,949 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 04:44:21,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:21,112 INFO L93 Difference]: Finished difference Result 553 states and 1551 transitions. [2021-06-05 04:44:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:21,112 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 04:44:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:21,113 INFO L225 Difference]: With dead ends: 553 [2021-06-05 04:44:21,113 INFO L226 Difference]: Without dead ends: 553 [2021-06-05 04:44:21,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:21,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-05 04:44:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2021-06-05 04:44:21,116 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 04:44:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 852 transitions. [2021-06-05 04:44:21,116 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 852 transitions. Word has length 20 [2021-06-05 04:44:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:21,117 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 852 transitions. [2021-06-05 04:44:21,117 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 04:44:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 852 transitions. [2021-06-05 04:44:21,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:21,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:21,117 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:21,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3942,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:21,317 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:21,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:21,318 INFO L82 PathProgramCache]: Analyzing trace with hash 349916067, now seen corresponding path program 437 times [2021-06-05 04:44:21,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:21,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726614626] [2021-06-05 04:44:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:21,360 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 04:44:21,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:21,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726614626] [2021-06-05 04:44:21,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726614626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:21,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013400004] [2021-06-05 04:44:21,360 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 04:44:21,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:21,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:21,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:21,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:21,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013400004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:21,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:21,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:44:21,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787182993] [2021-06-05 04:44:21,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:21,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:21,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:21,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:21,525 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 04:44:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:21,727 INFO L93 Difference]: Finished difference Result 328 states and 952 transitions. [2021-06-05 04:44:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:21,727 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 04:44:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:21,728 INFO L225 Difference]: With dead ends: 328 [2021-06-05 04:44:21,728 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 04:44:21,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 04:44:21,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 295. [2021-06-05 04:44:21,730 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 04:44:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 867 transitions. [2021-06-05 04:44:21,731 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 867 transitions. Word has length 20 [2021-06-05 04:44:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:21,731 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 867 transitions. [2021-06-05 04:44:21,731 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 04:44:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 867 transitions. [2021-06-05 04:44:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:21,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:21,731 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 04:44:21,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3951,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:21,932 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:21,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:21,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1101316505, now seen corresponding path program 438 times [2021-06-05 04:44:21,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:21,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626421679] [2021-06-05 04:44:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:21,975 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 04:44:21,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:21,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626421679] [2021-06-05 04:44:21,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626421679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:21,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193175862] [2021-06-05 04:44:21,976 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 04:44:22,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:44:22,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:22,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:22,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:22,158 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 04:44:22,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193175862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:22,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:22,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:44:22,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910563963] [2021-06-05 04:44:22,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:22,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:22,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:22,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:22,159 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 04:44:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:22,355 INFO L93 Difference]: Finished difference Result 353 states and 1004 transitions. [2021-06-05 04:44:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:22,356 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 04:44:22,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:22,356 INFO L225 Difference]: With dead ends: 353 [2021-06-05 04:44:22,356 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 04:44:22,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 04:44:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 305. [2021-06-05 04:44:22,359 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 04:44:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 894 transitions. [2021-06-05 04:44:22,359 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 894 transitions. Word has length 20 [2021-06-05 04:44:22,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:22,359 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 894 transitions. [2021-06-05 04:44:22,359 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 04:44:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 894 transitions. [2021-06-05 04:44:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:22,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:22,360 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:22,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3956 [2021-06-05 04:44:22,560 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:22,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:22,561 INFO L82 PathProgramCache]: Analyzing trace with hash -814107421, now seen corresponding path program 439 times [2021-06-05 04:44:22,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:22,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585564170] [2021-06-05 04:44:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:22,609 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 04:44:22,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:22,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585564170] [2021-06-05 04:44:22,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585564170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:22,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071398203] [2021-06-05 04:44:22,610 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 04:44:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:22,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:22,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071398203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:22,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:22,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:44:22,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889993787] [2021-06-05 04:44:22,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:22,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:22,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:22,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:22,773 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 04:44:22,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:22,928 INFO L93 Difference]: Finished difference Result 324 states and 950 transitions. [2021-06-05 04:44:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:22,928 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 04:44:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:22,929 INFO L225 Difference]: With dead ends: 324 [2021-06-05 04:44:22,929 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 04:44:22,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:44:22,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 04:44:22,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 293. [2021-06-05 04:44:22,931 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 04:44:22,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 862 transitions. [2021-06-05 04:44:22,932 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 862 transitions. Word has length 20 [2021-06-05 04:44:22,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:22,932 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 862 transitions. [2021-06-05 04:44:22,932 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 04:44:22,932 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 862 transitions. [2021-06-05 04:44:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:22,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:22,932 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:23,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:23,135 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:23,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:23,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1011112125, now seen corresponding path program 440 times [2021-06-05 04:44:23,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:23,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561771190] [2021-06-05 04:44:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:23,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:23,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561771190] [2021-06-05 04:44:23,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561771190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:23,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442490802] [2021-06-05 04:44:23,179 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 04:44:23,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:23,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:23,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:23,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442490802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:23,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:23,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:44:23,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768882584] [2021-06-05 04:44:23,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:23,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:23,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:23,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:23,338 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 04:44:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:23,467 INFO L93 Difference]: Finished difference Result 359 states and 1019 transitions. [2021-06-05 04:44:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:23,467 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 04:44:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:23,468 INFO L225 Difference]: With dead ends: 359 [2021-06-05 04:44:23,468 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 04:44:23,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:44:23,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 04:44:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 307. [2021-06-05 04:44:23,471 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 04:44:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 901 transitions. [2021-06-05 04:44:23,471 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 901 transitions. Word has length 20 [2021-06-05 04:44:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:23,471 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 901 transitions. [2021-06-05 04:44:23,471 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 04:44:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 901 transitions. [2021-06-05 04:44:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:23,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:23,472 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:23,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3969 [2021-06-05 04:44:23,672 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:23,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1368431245, now seen corresponding path program 441 times [2021-06-05 04:44:23,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:23,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141868585] [2021-06-05 04:44:23,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:23,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:23,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141868585] [2021-06-05 04:44:23,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141868585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:23,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114053793] [2021-06-05 04:44:23,718 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 04:44:23,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:44:23,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:23,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:23,871 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 04:44:23,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114053793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:23,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:23,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:44:23,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976599390] [2021-06-05 04:44:23,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:23,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:23,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:23,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:23,872 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 04:44:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:24,026 INFO L93 Difference]: Finished difference Result 359 states and 1025 transitions. [2021-06-05 04:44:24,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:24,026 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 04:44:24,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:24,027 INFO L225 Difference]: With dead ends: 359 [2021-06-05 04:44:24,027 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 04:44:24,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:44:24,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 04:44:24,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 305. [2021-06-05 04:44:24,030 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 04:44:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 896 transitions. [2021-06-05 04:44:24,030 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 896 transitions. Word has length 20 [2021-06-05 04:44:24,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:24,030 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 896 transitions. [2021-06-05 04:44:24,030 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 04:44:24,030 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 896 transitions. [2021-06-05 04:44:24,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:24,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:24,030 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:24,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3975,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:24,231 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:24,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:24,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1886300253, now seen corresponding path program 442 times [2021-06-05 04:44:24,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:24,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801689373] [2021-06-05 04:44:24,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:24,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:24,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801689373] [2021-06-05 04:44:24,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801689373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:24,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048288939] [2021-06-05 04:44:24,276 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 04:44:24,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:24,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:24,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:24,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:24,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048288939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:24,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:24,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:44:24,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072176012] [2021-06-05 04:44:24,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:24,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:24,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:24,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:24,430 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 04:44:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:24,552 INFO L93 Difference]: Finished difference Result 334 states and 975 transitions. [2021-06-05 04:44:24,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:24,552 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 04:44:24,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:24,553 INFO L225 Difference]: With dead ends: 334 [2021-06-05 04:44:24,553 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 04:44:24,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:24,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 04:44:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2021-06-05 04:44:24,555 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 04:44:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-06-05 04:44:24,556 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2021-06-05 04:44:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:24,556 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-06-05 04:44:24,556 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 04:44:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-06-05 04:44:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:24,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:24,556 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 04:44:24,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,445 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:24,757 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:24,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2010921463, now seen corresponding path program 443 times [2021-06-05 04:44:24,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:24,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139649697] [2021-06-05 04:44:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:24,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:24,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139649697] [2021-06-05 04:44:24,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139649697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:24,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432762964] [2021-06-05 04:44:24,802 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 04:44:24,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:44:24,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:24,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:24,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432762964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:24,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:24,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:44:24,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025838426] [2021-06-05 04:44:24,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:24,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:24,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:24,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:24,956 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 04:44:25,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:25,099 INFO L93 Difference]: Finished difference Result 418 states and 1160 transitions. [2021-06-05 04:44:25,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:25,100 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 04:44:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:25,100 INFO L225 Difference]: With dead ends: 418 [2021-06-05 04:44:25,100 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 04:44:25,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:44:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 04:44:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2021-06-05 04:44:25,103 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 04:44:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 908 transitions. [2021-06-05 04:44:25,104 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 908 transitions. Word has length 20 [2021-06-05 04:44:25,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:25,104 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 908 transitions. [2021-06-05 04:44:25,104 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 04:44:25,104 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 908 transitions. [2021-06-05 04:44:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:25,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:25,104 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:25,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:25,320 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 95497537, now seen corresponding path program 444 times [2021-06-05 04:44:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:25,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748340535] [2021-06-05 04:44:25,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:25,368 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 04:44:25,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:25,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748340535] [2021-06-05 04:44:25,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748340535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:25,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045569823] [2021-06-05 04:44:25,369 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 04:44:25,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:44:25,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:25,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:25,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:25,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045569823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:25,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:25,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:44:25,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309525615] [2021-06-05 04:44:25,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:25,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:25,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:25,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:25,523 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 04:44:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:25,690 INFO L93 Difference]: Finished difference Result 418 states and 1166 transitions. [2021-06-05 04:44:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:25,690 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 04:44:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:25,691 INFO L225 Difference]: With dead ends: 418 [2021-06-05 04:44:25,691 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 04:44:25,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:44:25,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 04:44:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 307. [2021-06-05 04:44:25,694 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 04:44:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 903 transitions. [2021-06-05 04:44:25,694 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 903 transitions. Word has length 20 [2021-06-05 04:44:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:25,694 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 903 transitions. [2021-06-05 04:44:25,694 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 04:44:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 903 transitions. [2021-06-05 04:44:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:25,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:25,695 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 04:44:25,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3989 [2021-06-05 04:44:25,895 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:25,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:25,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1135733335, now seen corresponding path program 445 times [2021-06-05 04:44:25,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:25,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33541399] [2021-06-05 04:44:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:25,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:25,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33541399] [2021-06-05 04:44:25,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33541399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:25,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436435001] [2021-06-05 04:44:25,950 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 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 04:44:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:26,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:26,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:26,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436435001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:26,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:26,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:44:26,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895909284] [2021-06-05 04:44:26,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:44:26,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:26,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:44:26,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:44:26,099 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 04:44:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:26,227 INFO L93 Difference]: Finished difference Result 407 states and 1153 transitions. [2021-06-05 04:44:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:26,227 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 04:44:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:26,227 INFO L225 Difference]: With dead ends: 407 [2021-06-05 04:44:26,227 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 04:44:26,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:26,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 04:44:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 305. [2021-06-05 04:44:26,230 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 04:44:26,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 898 transitions. [2021-06-05 04:44:26,231 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 898 transitions. Word has length 20 [2021-06-05 04:44:26,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:26,231 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 898 transitions. [2021-06-05 04:44:26,231 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 04:44:26,231 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 898 transitions. [2021-06-05 04:44:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:26,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:26,232 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:26,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3994,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:26,432 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:26,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1399181021, now seen corresponding path program 446 times [2021-06-05 04:44:26,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:26,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018889215] [2021-06-05 04:44:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:26,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:26,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018889215] [2021-06-05 04:44:26,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018889215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:26,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068779582] [2021-06-05 04:44:26,490 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 04:44:26,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:26,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:26,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:26,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068779582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:26,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:26,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:44:26,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230967132] [2021-06-05 04:44:26,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:44:26,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:26,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:44:26,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:44:26,629 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 04:44:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:26,755 INFO L93 Difference]: Finished difference Result 397 states and 1126 transitions. [2021-06-05 04:44:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:26,755 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 04:44:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:26,756 INFO L225 Difference]: With dead ends: 397 [2021-06-05 04:44:26,756 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 04:44:26,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 04:44:26,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 291. [2021-06-05 04:44:26,758 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 04:44:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 857 transitions. [2021-06-05 04:44:26,759 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 857 transitions. Word has length 20 [2021-06-05 04:44:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:26,759 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 857 transitions. [2021-06-05 04:44:26,759 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 04:44:26,759 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 857 transitions. [2021-06-05 04:44:26,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:26,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:26,759 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:26,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3997,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:26,960 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:26,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:26,960 INFO L82 PathProgramCache]: Analyzing trace with hash -817863631, now seen corresponding path program 447 times [2021-06-05 04:44:26,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:26,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494476767] [2021-06-05 04:44:26,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:27,020 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 04:44:27,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:27,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494476767] [2021-06-05 04:44:27,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494476767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:27,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464743826] [2021-06-05 04:44:27,020 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 04:44:27,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:44:27,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:27,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:27,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:27,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464743826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:27,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:27,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:27,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274016286] [2021-06-05 04:44:27,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:27,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:27,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:27,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:27,270 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 04:44:27,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:27,722 INFO L93 Difference]: Finished difference Result 592 states and 1701 transitions. [2021-06-05 04:44:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:27,722 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 04:44:27,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:27,723 INFO L225 Difference]: With dead ends: 592 [2021-06-05 04:44:27,723 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 04:44:27,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 499.4ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 04:44:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 303. [2021-06-05 04:44:27,726 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 04:44:27,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 903 transitions. [2021-06-05 04:44:27,727 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 903 transitions. Word has length 20 [2021-06-05 04:44:27,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:27,727 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 903 transitions. [2021-06-05 04:44:27,727 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 04:44:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 903 transitions. [2021-06-05 04:44:27,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:27,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:27,727 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 04:44:27,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4000,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:27,928 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:27,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:27,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1983195943, now seen corresponding path program 448 times [2021-06-05 04:44:27,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:27,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242978761] [2021-06-05 04:44:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:27,984 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 04:44:27,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:27,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242978761] [2021-06-05 04:44:27,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242978761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:27,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214582905] [2021-06-05 04:44:27,985 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 04:44:28,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:28,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:28,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:28,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:28,219 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 04:44:28,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214582905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:28,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:28,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:28,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333412988] [2021-06-05 04:44:28,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:28,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:28,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:28,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:28,219 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 04:44:28,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:28,641 INFO L93 Difference]: Finished difference Result 598 states and 1708 transitions. [2021-06-05 04:44:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:28,641 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 04:44:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:28,642 INFO L225 Difference]: With dead ends: 598 [2021-06-05 04:44:28,642 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 04:44:28,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:44:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 04:44:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 300. [2021-06-05 04:44:28,645 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 04:44:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 892 transitions. [2021-06-05 04:44:28,646 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 892 transitions. Word has length 20 [2021-06-05 04:44:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:28,646 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 892 transitions. [2021-06-05 04:44:28,646 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 04:44:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 892 transitions. [2021-06-05 04:44:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:28,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:28,646 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:28,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4013 [2021-06-05 04:44:28,847 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:28,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:28,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1773915775, now seen corresponding path program 449 times [2021-06-05 04:44:28,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:28,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008255895] [2021-06-05 04:44:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:28,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:28,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008255895] [2021-06-05 04:44:28,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008255895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:28,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310664850] [2021-06-05 04:44:28,903 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 04:44:28,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:28,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:28,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:28,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:29,140 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 04:44:29,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310664850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:29,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:29,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:29,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657734499] [2021-06-05 04:44:29,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:29,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:29,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:29,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:29,140 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 04:44:29,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:29,509 INFO L93 Difference]: Finished difference Result 562 states and 1626 transitions. [2021-06-05 04:44:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:29,510 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 04:44:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:29,510 INFO L225 Difference]: With dead ends: 562 [2021-06-05 04:44:29,510 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 04:44:29,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 04:44:29,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 297. [2021-06-05 04:44:29,514 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 04:44:29,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2021-06-05 04:44:29,514 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2021-06-05 04:44:29,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:29,514 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2021-06-05 04:44:29,514 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 04:44:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2021-06-05 04:44:29,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:29,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:29,515 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 04:44:29,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4021 [2021-06-05 04:44:29,715 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:29,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1186170453, now seen corresponding path program 450 times [2021-06-05 04:44:29,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:29,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041588314] [2021-06-05 04:44:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:29,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:29,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041588314] [2021-06-05 04:44:29,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041588314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:29,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702579738] [2021-06-05 04:44:29,768 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 04:44:29,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:44:29,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:29,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:29,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:29,973 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 04:44:29,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702579738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:29,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:29,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:29,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98536178] [2021-06-05 04:44:29,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:29,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:29,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:29,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:29,974 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 04:44:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:30,290 INFO L93 Difference]: Finished difference Result 594 states and 1686 transitions. [2021-06-05 04:44:30,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:30,290 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 04:44:30,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:30,291 INFO L225 Difference]: With dead ends: 594 [2021-06-05 04:44:30,291 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 04:44:30,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 04:44:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 294. [2021-06-05 04:44:30,294 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 04:44:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2021-06-05 04:44:30,294 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2021-06-05 04:44:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:30,295 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2021-06-05 04:44:30,295 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 04:44:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2021-06-05 04:44:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:30,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:30,295 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 04:44:30,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-06-05 04:44:30,495 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:30,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:30,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1435633387, now seen corresponding path program 451 times [2021-06-05 04:44:30,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:30,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938543528] [2021-06-05 04:44:30,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:30,557 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 04:44:30,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:30,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938543528] [2021-06-05 04:44:30,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938543528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:30,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609250365] [2021-06-05 04:44:30,557 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 04:44:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:30,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:30,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:30,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609250365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:30,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:30,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:30,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228007333] [2021-06-05 04:44:30,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:30,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:30,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:30,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:30,815 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 04:44:31,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:31,216 INFO L93 Difference]: Finished difference Result 604 states and 1731 transitions. [2021-06-05 04:44:31,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:31,217 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 04:44:31,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:31,217 INFO L225 Difference]: With dead ends: 604 [2021-06-05 04:44:31,217 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 04:44:31,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:31,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 04:44:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 301. [2021-06-05 04:44:31,221 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 04:44:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 897 transitions. [2021-06-05 04:44:31,221 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 897 transitions. Word has length 20 [2021-06-05 04:44:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:31,221 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 897 transitions. [2021-06-05 04:44:31,222 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 04:44:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 897 transitions. [2021-06-05 04:44:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:31,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:31,222 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:31,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:31,422 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash -58274335, now seen corresponding path program 452 times [2021-06-05 04:44:31,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:31,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341096894] [2021-06-05 04:44:31,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:31,481 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 04:44:31,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:31,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341096894] [2021-06-05 04:44:31,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341096894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:31,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357567361] [2021-06-05 04:44:31,482 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 04:44:31,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:31,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:31,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:31,718 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 04:44:31,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357567361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:31,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:31,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:31,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16071004] [2021-06-05 04:44:31,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:31,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:31,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:31,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:31,719 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 04:44:32,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:32,132 INFO L93 Difference]: Finished difference Result 610 states and 1738 transitions. [2021-06-05 04:44:32,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:32,133 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 04:44:32,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:32,133 INFO L225 Difference]: With dead ends: 610 [2021-06-05 04:44:32,134 INFO L226 Difference]: Without dead ends: 604 [2021-06-05 04:44:32,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:44:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-05 04:44:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 298. [2021-06-05 04:44:32,137 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 04:44:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 886 transitions. [2021-06-05 04:44:32,137 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 886 transitions. Word has length 20 [2021-06-05 04:44:32,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:32,137 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 886 transitions. [2021-06-05 04:44:32,137 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 04:44:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 886 transitions. [2021-06-05 04:44:32,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:32,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:32,138 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 04:44:32,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4049,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:32,338 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:32,338 INFO L82 PathProgramCache]: Analyzing trace with hash 479581243, now seen corresponding path program 453 times [2021-06-05 04:44:32,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:32,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201118558] [2021-06-05 04:44:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:32,396 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 04:44:32,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201118558] [2021-06-05 04:44:32,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201118558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532577371] [2021-06-05 04:44:32,396 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 04:44:32,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:44:32,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:32,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:32,637 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 04:44:32,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532577371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:32,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:32,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:32,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118199913] [2021-06-05 04:44:32,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:32,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:32,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:32,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:32,638 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 04:44:32,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:32,915 INFO L93 Difference]: Finished difference Result 574 states and 1656 transitions. [2021-06-05 04:44:32,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:32,915 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 04:44:32,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:32,916 INFO L225 Difference]: With dead ends: 574 [2021-06-05 04:44:32,916 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 04:44:32,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:32,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 04:44:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 295. [2021-06-05 04:44:32,919 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 04:44:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2021-06-05 04:44:32,920 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2021-06-05 04:44:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:32,920 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2021-06-05 04:44:32,920 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 04:44:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2021-06-05 04:44:32,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:32,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:32,920 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 04:44:33,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-06-05 04:44:33,121 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:33,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1040756811, now seen corresponding path program 454 times [2021-06-05 04:44:33,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:33,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905306379] [2021-06-05 04:44:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:33,184 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 04:44:33,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:33,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905306379] [2021-06-05 04:44:33,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905306379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:33,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003262319] [2021-06-05 04:44:33,184 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 04:44:33,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:33,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:33,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:33,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003262319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:33,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:33,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:33,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106536115] [2021-06-05 04:44:33,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:33,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:33,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:33,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:33,453 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 04:44:33,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:33,981 INFO L93 Difference]: Finished difference Result 682 states and 1928 transitions. [2021-06-05 04:44:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:33,981 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 04:44:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:33,982 INFO L225 Difference]: With dead ends: 682 [2021-06-05 04:44:33,982 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 04:44:33,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 532.8ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:44:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 04:44:33,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 303. [2021-06-05 04:44:33,986 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 04:44:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 911 transitions. [2021-06-05 04:44:33,986 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 911 transitions. Word has length 20 [2021-06-05 04:44:33,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:33,986 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 911 transitions. [2021-06-05 04:44:33,986 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 04:44:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 911 transitions. [2021-06-05 04:44:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:33,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:33,987 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:34,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4065 [2021-06-05 04:44:34,187 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:34,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1760302763, now seen corresponding path program 455 times [2021-06-05 04:44:34,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:34,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511550730] [2021-06-05 04:44:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:34,251 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 04:44:34,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:34,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511550730] [2021-06-05 04:44:34,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511550730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:34,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374310283] [2021-06-05 04:44:34,251 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 04:44:34,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:34,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:34,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:34,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:34,489 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 04:44:34,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374310283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:34,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:34,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:34,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761520616] [2021-06-05 04:44:34,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:34,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:34,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:34,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:34,490 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 04:44:35,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:35,070 INFO L93 Difference]: Finished difference Result 688 states and 1929 transitions. [2021-06-05 04:44:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:44:35,070 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 04:44:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:35,071 INFO L225 Difference]: With dead ends: 688 [2021-06-05 04:44:35,071 INFO L226 Difference]: Without dead ends: 682 [2021-06-05 04:44:35,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 606.3ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-05 04:44:35,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 306. [2021-06-05 04:44:35,075 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 04:44:35,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 913 transitions. [2021-06-05 04:44:35,075 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 913 transitions. Word has length 20 [2021-06-05 04:44:35,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:35,075 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 913 transitions. [2021-06-05 04:44:35,075 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 04:44:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 913 transitions. [2021-06-05 04:44:35,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:35,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:35,076 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:35,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4073 [2021-06-05 04:44:35,276 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:35,276 INFO L82 PathProgramCache]: Analyzing trace with hash -289356373, now seen corresponding path program 456 times [2021-06-05 04:44:35,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:35,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447604981] [2021-06-05 04:44:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:35,350 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 04:44:35,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:35,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447604981] [2021-06-05 04:44:35,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447604981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:35,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042380291] [2021-06-05 04:44:35,351 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 04:44:35,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:44:35,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:35,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:35,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:35,598 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 04:44:35,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042380291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:35,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:35,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:35,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116609758] [2021-06-05 04:44:35,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:35,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:35,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:35,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:35,599 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 04:44:35,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:35,968 INFO L93 Difference]: Finished difference Result 650 states and 1849 transitions. [2021-06-05 04:44:35,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:35,969 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 04:44:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:35,969 INFO L225 Difference]: With dead ends: 650 [2021-06-05 04:44:35,969 INFO L226 Difference]: Without dead ends: 650 [2021-06-05 04:44:35,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:35,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-05 04:44:35,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 299. [2021-06-05 04:44:35,973 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 04:44:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 895 transitions. [2021-06-05 04:44:35,975 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 895 transitions. Word has length 20 [2021-06-05 04:44:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:35,975 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 895 transitions. [2021-06-05 04:44:35,975 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 04:44:35,975 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 895 transitions. [2021-06-05 04:44:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:35,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:35,976 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 04:44:36,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:36,189 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:36,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1002986027, now seen corresponding path program 457 times [2021-06-05 04:44:36,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:36,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949083897] [2021-06-05 04:44:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:36,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:36,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949083897] [2021-06-05 04:44:36,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949083897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:36,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060056877] [2021-06-05 04:44:36,254 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 04:44:36,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:36,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:36,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060056877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:36,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:36,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:36,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064429549] [2021-06-05 04:44:36,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:36,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:36,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:36,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:36,494 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 04:44:36,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:36,813 INFO L93 Difference]: Finished difference Result 613 states and 1767 transitions. [2021-06-05 04:44:36,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:36,813 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 04:44:36,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:36,814 INFO L225 Difference]: With dead ends: 613 [2021-06-05 04:44:36,814 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 04:44:36,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 360.5ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:36,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 04:44:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 296. [2021-06-05 04:44:36,818 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 04:44:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 880 transitions. [2021-06-05 04:44:36,818 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 880 transitions. Word has length 20 [2021-06-05 04:44:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:36,818 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 880 transitions. [2021-06-05 04:44:36,818 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 04:44:36,818 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 880 transitions. [2021-06-05 04:44:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:36,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:36,819 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:37,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4088,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:37,019 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:37,019 INFO L82 PathProgramCache]: Analyzing trace with hash -268619845, now seen corresponding path program 458 times [2021-06-05 04:44:37,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:37,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128903211] [2021-06-05 04:44:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:37,081 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 04:44:37,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:37,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128903211] [2021-06-05 04:44:37,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128903211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:37,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714370335] [2021-06-05 04:44:37,081 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 04:44:37,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:37,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:37,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:37,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:37,329 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 04:44:37,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714370335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:37,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:37,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:37,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690919505] [2021-06-05 04:44:37,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:37,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:37,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:37,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:37,330 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 04:44:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:37,917 INFO L93 Difference]: Finished difference Result 650 states and 1841 transitions. [2021-06-05 04:44:37,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:44:37,917 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 04:44:37,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:37,918 INFO L225 Difference]: With dead ends: 650 [2021-06-05 04:44:37,918 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 04:44:37,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 602.7ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:44:37,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 04:44:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 306. [2021-06-05 04:44:37,922 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 04:44:37,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 907 transitions. [2021-06-05 04:44:37,922 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 907 transitions. Word has length 20 [2021-06-05 04:44:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:37,922 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 907 transitions. [2021-06-05 04:44:37,922 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 04:44:37,922 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 907 transitions. [2021-06-05 04:44:37,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:37,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:37,923 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:38,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4095 [2021-06-05 04:44:38,123 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:38,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2110923525, now seen corresponding path program 459 times [2021-06-05 04:44:38,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:38,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563725439] [2021-06-05 04:44:38,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:38,190 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 04:44:38,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:38,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563725439] [2021-06-05 04:44:38,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563725439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:38,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997955909] [2021-06-05 04:44:38,191 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 04:44:38,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:44:38,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:38,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:38,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997955909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:38,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:38,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:38,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806409290] [2021-06-05 04:44:38,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:38,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:38,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:38,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:38,468 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 04:44:39,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:39,002 INFO L93 Difference]: Finished difference Result 627 states and 1802 transitions. [2021-06-05 04:44:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:39,002 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 04:44:39,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:39,003 INFO L225 Difference]: With dead ends: 627 [2021-06-05 04:44:39,003 INFO L226 Difference]: Without dead ends: 627 [2021-06-05 04:44:39,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 590.0ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:44:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-06-05 04:44:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 295. [2021-06-05 04:44:39,006 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 04:44:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 875 transitions. [2021-06-05 04:44:39,007 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 875 transitions. Word has length 20 [2021-06-05 04:44:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:39,007 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 875 transitions. [2021-06-05 04:44:39,007 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 04:44:39,007 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 875 transitions. [2021-06-05 04:44:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:39,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:39,007 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:39,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4105,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:39,208 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:39,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:39,208 INFO L82 PathProgramCache]: Analyzing trace with hash 2007489835, now seen corresponding path program 460 times [2021-06-05 04:44:39,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:39,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94534925] [2021-06-05 04:44:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:39,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:39,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94534925] [2021-06-05 04:44:39,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94534925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:39,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809750765] [2021-06-05 04:44:39,269 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 04:44:39,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:39,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:39,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:39,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:39,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809750765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:39,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:39,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:39,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369384429] [2021-06-05 04:44:39,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:39,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:39,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:39,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:39,567 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 04:44:39,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:39,919 INFO L93 Difference]: Finished difference Result 567 states and 1639 transitions. [2021-06-05 04:44:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:39,919 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 04:44:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:39,920 INFO L225 Difference]: With dead ends: 567 [2021-06-05 04:44:39,920 INFO L226 Difference]: Without dead ends: 555 [2021-06-05 04:44:39,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 449.1ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:39,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-05 04:44:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 297. [2021-06-05 04:44:39,923 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 04:44:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 880 transitions. [2021-06-05 04:44:39,924 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 880 transitions. Word has length 20 [2021-06-05 04:44:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:39,924 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 880 transitions. [2021-06-05 04:44:39,924 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 04:44:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 880 transitions. [2021-06-05 04:44:39,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:39,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:39,924 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:40,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:40,125 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:40,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1536077023, now seen corresponding path program 461 times [2021-06-05 04:44:40,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:40,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415058810] [2021-06-05 04:44:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:40,183 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 04:44:40,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:40,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415058810] [2021-06-05 04:44:40,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415058810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:40,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054556803] [2021-06-05 04:44:40,183 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 04:44:40,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:40,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:40,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:40,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:40,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054556803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:40,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:40,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:40,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094481259] [2021-06-05 04:44:40,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:40,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:40,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:40,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:40,428 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 04:44:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:40,853 INFO L93 Difference]: Finished difference Result 592 states and 1691 transitions. [2021-06-05 04:44:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:40,854 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 04:44:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:40,854 INFO L225 Difference]: With dead ends: 592 [2021-06-05 04:44:40,854 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 04:44:40,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 488.8ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:44:40,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 04:44:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 307. [2021-06-05 04:44:40,858 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 04:44:40,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-06-05 04:44:40,858 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-06-05 04:44:40,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:40,858 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-06-05 04:44:40,858 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 04:44:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-06-05 04:44:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:40,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:40,859 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 04:44:41,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4127 [2021-06-05 04:44:41,059 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:41,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:41,059 INFO L82 PathProgramCache]: Analyzing trace with hash 843466347, now seen corresponding path program 462 times [2021-06-05 04:44:41,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:41,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739812178] [2021-06-05 04:44:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:41,120 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 04:44:41,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:41,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739812178] [2021-06-05 04:44:41,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739812178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:41,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240093046] [2021-06-05 04:44:41,120 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 04:44:41,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:44:41,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:41,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:41,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:41,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240093046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:41,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:41,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:41,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369001714] [2021-06-05 04:44:41,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:41,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:41,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:41,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:41,360 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 04:44:41,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:41,637 INFO L93 Difference]: Finished difference Result 563 states and 1637 transitions. [2021-06-05 04:44:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:41,637 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 04:44:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:41,638 INFO L225 Difference]: With dead ends: 563 [2021-06-05 04:44:41,638 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 04:44:41,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 338.5ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:41,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 04:44:41,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 294. [2021-06-05 04:44:41,641 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 04:44:41,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 870 transitions. [2021-06-05 04:44:41,642 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 870 transitions. Word has length 20 [2021-06-05 04:44:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:41,642 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 870 transitions. [2021-06-05 04:44:41,642 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 04:44:41,642 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 870 transitions. [2021-06-05 04:44:41,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:41,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:41,642 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:41,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-06-05 04:44:41,843 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:41,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:41,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1065644357, now seen corresponding path program 463 times [2021-06-05 04:44:41,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:41,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391785292] [2021-06-05 04:44:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:41,893 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 04:44:41,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:41,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391785292] [2021-06-05 04:44:41,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391785292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:41,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904083531] [2021-06-05 04:44:41,893 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 04:44:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:41,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:41,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:42,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904083531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:42,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:42,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:44:42,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928507797] [2021-06-05 04:44:42,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:44:42,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:42,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:44:42,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:44:42,102 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 04:44:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:42,438 INFO L93 Difference]: Finished difference Result 651 states and 1821 transitions. [2021-06-05 04:44:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:42,438 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 04:44:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:42,439 INFO L225 Difference]: With dead ends: 651 [2021-06-05 04:44:42,439 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 04:44:42,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 366.7ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 04:44:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 296. [2021-06-05 04:44:42,443 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 04:44:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 875 transitions. [2021-06-05 04:44:42,443 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 875 transitions. Word has length 20 [2021-06-05 04:44:42,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:42,443 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 875 transitions. [2021-06-05 04:44:42,443 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 04:44:42,443 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 875 transitions. [2021-06-05 04:44:42,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:42,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:42,444 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 04:44:42,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4143 [2021-06-05 04:44:42,644 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash 946711745, now seen corresponding path program 464 times [2021-06-05 04:44:42,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:42,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696419977] [2021-06-05 04:44:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:42,698 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 04:44:42,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:42,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696419977] [2021-06-05 04:44:42,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696419977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:42,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167061876] [2021-06-05 04:44:42,699 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 04:44:42,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:42,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:42,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:42,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:42,940 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 04:44:42,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167061876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:42,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:42,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:42,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275528049] [2021-06-05 04:44:42,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:42,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:42,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:42,940 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 04:44:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:43,283 INFO L93 Difference]: Finished difference Result 612 states and 1742 transitions. [2021-06-05 04:44:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:43,283 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 04:44:43,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:43,284 INFO L225 Difference]: With dead ends: 612 [2021-06-05 04:44:43,284 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 04:44:43,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 411.5ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 04:44:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 298. [2021-06-05 04:44:43,287 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 04:44:43,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 880 transitions. [2021-06-05 04:44:43,287 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 880 transitions. Word has length 20 [2021-06-05 04:44:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:43,288 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 880 transitions. [2021-06-05 04:44:43,288 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 04:44:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 880 transitions. [2021-06-05 04:44:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:43,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:43,288 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:43,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4153,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:43,488 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:43,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1698112183, now seen corresponding path program 465 times [2021-06-05 04:44:43,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:43,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055292122] [2021-06-05 04:44:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:43,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:43,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055292122] [2021-06-05 04:44:43,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055292122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:43,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257477266] [2021-06-05 04:44:43,543 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 04:44:43,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:44:43,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:43,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:43,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257477266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:43,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:43,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:43,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949113164] [2021-06-05 04:44:43,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:43,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:43,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:43,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:43,789 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 04:44:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:44,327 INFO L93 Difference]: Finished difference Result 637 states and 1794 transitions. [2021-06-05 04:44:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:44,327 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 04:44:44,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:44,328 INFO L225 Difference]: With dead ends: 637 [2021-06-05 04:44:44,328 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 04:44:44,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 570.7ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:44:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 04:44:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2021-06-05 04:44:44,331 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 04:44:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 907 transitions. [2021-06-05 04:44:44,332 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 907 transitions. Word has length 20 [2021-06-05 04:44:44,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:44,332 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 907 transitions. [2021-06-05 04:44:44,332 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 04:44:44,332 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 907 transitions. [2021-06-05 04:44:44,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:44,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:44,333 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:44,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4164 [2021-06-05 04:44:44,533 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:44,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:44,533 INFO L82 PathProgramCache]: Analyzing trace with hash -217311743, now seen corresponding path program 466 times [2021-06-05 04:44:44,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:44,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594932825] [2021-06-05 04:44:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:44,591 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 04:44:44,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:44,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594932825] [2021-06-05 04:44:44,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594932825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:44,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687221946] [2021-06-05 04:44:44,591 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 04:44:44,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:44,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:44,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:44,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:44,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687221946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:44,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:44,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:44,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280550886] [2021-06-05 04:44:44,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:44,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:44,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:44,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:44,830 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 04:44:45,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:45,175 INFO L93 Difference]: Finished difference Result 608 states and 1740 transitions. [2021-06-05 04:44:45,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:45,175 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 04:44:45,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:45,176 INFO L225 Difference]: With dead ends: 608 [2021-06-05 04:44:45,176 INFO L226 Difference]: Without dead ends: 608 [2021-06-05 04:44:45,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 399.9ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:45,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-06-05 04:44:45,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 293. [2021-06-05 04:44:45,180 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 04:44:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-06-05 04:44:45,180 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-06-05 04:44:45,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:45,180 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-06-05 04:44:45,180 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 04:44:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-06-05 04:44:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:45,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:45,181 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:45,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4171,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:45,381 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:45,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1114969903, now seen corresponding path program 467 times [2021-06-05 04:44:45,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:45,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745595143] [2021-06-05 04:44:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:45,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:45,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745595143] [2021-06-05 04:44:45,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745595143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:45,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865431470] [2021-06-05 04:44:45,441 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 04:44:45,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:45,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:45,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:45,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:45,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865431470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:45,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:45,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:45,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351240585] [2021-06-05 04:44:45,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:45,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:45,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:45,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:45,711 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 04:44:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:45,956 INFO L93 Difference]: Finished difference Result 489 states and 1405 transitions. [2021-06-05 04:44:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:45,956 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 04:44:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:45,957 INFO L225 Difference]: With dead ends: 489 [2021-06-05 04:44:45,957 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:44:45,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:44:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 301. [2021-06-05 04:44:45,960 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 04:44:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2021-06-05 04:44:45,960 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2021-06-05 04:44:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:45,960 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2021-06-05 04:44:45,960 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 04:44:45,960 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2021-06-05 04:44:45,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:45,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:45,961 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 04:44:46,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4180,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:46,161 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:46,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1686089671, now seen corresponding path program 468 times [2021-06-05 04:44:46,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:46,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347766005] [2021-06-05 04:44:46,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:46,219 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 04:44:46,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:46,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347766005] [2021-06-05 04:44:46,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347766005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:46,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882958198] [2021-06-05 04:44:46,219 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 04:44:46,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:44:46,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:46,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:46,475 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 04:44:46,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882958198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:46,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:46,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:46,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832018317] [2021-06-05 04:44:46,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:46,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:46,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:46,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:46,476 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 04:44:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:46,755 INFO L93 Difference]: Finished difference Result 495 states and 1412 transitions. [2021-06-05 04:44:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:46,756 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 04:44:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:46,756 INFO L225 Difference]: With dead ends: 495 [2021-06-05 04:44:46,756 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:44:46,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 316.2ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:44:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 298. [2021-06-05 04:44:46,759 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 04:44:46,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 04:44:46,760 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 04:44:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:46,760 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 04:44:46,760 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 04:44:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 04:44:46,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:46,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:46,760 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:46,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4191 [2021-06-05 04:44:46,961 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:46,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:46,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2071022047, now seen corresponding path program 469 times [2021-06-05 04:44:46,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:46,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811281798] [2021-06-05 04:44:46,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:47,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:47,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:47,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811281798] [2021-06-05 04:44:47,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811281798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:47,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891327139] [2021-06-05 04:44:47,016 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 04:44:47,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:47,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:47,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:47,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891327139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:47,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:47,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:47,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162651110] [2021-06-05 04:44:47,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:47,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:47,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:47,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:47,258 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 04:44:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:47,519 INFO L93 Difference]: Finished difference Result 459 states and 1330 transitions. [2021-06-05 04:44:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:47,519 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 04:44:47,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:47,520 INFO L225 Difference]: With dead ends: 459 [2021-06-05 04:44:47,520 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 04:44:47,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 04:44:47,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 295. [2021-06-05 04:44:47,523 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 04:44:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 04:44:47,523 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-06-05 04:44:47,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:47,523 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 04:44:47,523 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 04:44:47,523 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 04:44:47,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:47,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:47,523 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 04:44:47,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4199 [2021-06-05 04:44:47,724 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:47,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:47,724 INFO L82 PathProgramCache]: Analyzing trace with hash 703607195, now seen corresponding path program 470 times [2021-06-05 04:44:47,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:47,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920044070] [2021-06-05 04:44:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:47,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:47,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920044070] [2021-06-05 04:44:47,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920044070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:47,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824933032] [2021-06-05 04:44:47,785 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 04:44:47,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:47,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:47,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:47,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:48,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824933032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:48,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:48,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:48,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739346622] [2021-06-05 04:44:48,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:48,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:48,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:48,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:48,018 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 04:44:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:48,305 INFO L93 Difference]: Finished difference Result 576 states and 1623 transitions. [2021-06-05 04:44:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:48,305 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 04:44:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:48,306 INFO L225 Difference]: With dead ends: 576 [2021-06-05 04:44:48,306 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 04:44:48,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:44:48,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 04:44:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 303. [2021-06-05 04:44:48,309 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 04:44:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-06-05 04:44:48,310 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-06-05 04:44:48,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:48,310 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-06-05 04:44:48,310 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 04:44:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-06-05 04:44:48,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:48,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:48,310 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 04:44:48,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4206,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:48,511 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:48,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:48,511 INFO L82 PathProgramCache]: Analyzing trace with hash -790300527, now seen corresponding path program 471 times [2021-06-05 04:44:48,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:48,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487276121] [2021-06-05 04:44:48,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:48,570 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 04:44:48,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:48,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487276121] [2021-06-05 04:44:48,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487276121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:48,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741636991] [2021-06-05 04:44:48,570 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 04:44:48,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:44:48,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:48,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:48,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:48,797 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 04:44:48,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741636991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:48,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:48,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:48,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239655620] [2021-06-05 04:44:48,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:48,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:48,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:48,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:48,798 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 04:44:49,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:49,132 INFO L93 Difference]: Finished difference Result 582 states and 1624 transitions. [2021-06-05 04:44:49,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:44:49,132 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 04:44:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:49,133 INFO L225 Difference]: With dead ends: 582 [2021-06-05 04:44:49,133 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 04:44:49,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:44:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 04:44:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 306. [2021-06-05 04:44:49,137 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 04:44:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-06-05 04:44:49,137 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-06-05 04:44:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:49,137 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-06-05 04:44:49,137 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 04:44:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-06-05 04:44:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:49,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:49,138 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 04:44:49,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4218 [2021-06-05 04:44:49,338 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:49,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:49,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1455007633, now seen corresponding path program 472 times [2021-06-05 04:44:49,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:49,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660027514] [2021-06-05 04:44:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:49,405 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 04:44:49,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:49,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660027514] [2021-06-05 04:44:49,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660027514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:49,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695770690] [2021-06-05 04:44:49,405 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 04:44:49,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:49,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:49,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:49,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:49,672 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 04:44:49,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695770690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:49,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:49,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:49,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583679181] [2021-06-05 04:44:49,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:49,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:49,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:49,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:49,672 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 04:44:49,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:49,863 INFO L93 Difference]: Finished difference Result 544 states and 1544 transitions. [2021-06-05 04:44:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:49,863 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 04:44:49,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:49,864 INFO L225 Difference]: With dead ends: 544 [2021-06-05 04:44:49,864 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 04:44:49,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:49,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 04:44:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 299. [2021-06-05 04:44:49,867 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 04:44:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2021-06-05 04:44:49,868 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2021-06-05 04:44:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:49,868 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2021-06-05 04:44:49,868 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 04:44:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2021-06-05 04:44:49,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:49,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:49,868 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:50,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4225,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:50,068 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:50,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1547617263, now seen corresponding path program 473 times [2021-06-05 04:44:50,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:50,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488237576] [2021-06-05 04:44:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:50,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:50,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488237576] [2021-06-05 04:44:50,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488237576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:50,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73106163] [2021-06-05 04:44:50,132 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 04:44:50,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:44:50,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:50,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:50,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:50,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73106163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:50,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:50,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:50,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288428689] [2021-06-05 04:44:50,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:50,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:50,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:50,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:50,362 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 04:44:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:50,579 INFO L93 Difference]: Finished difference Result 507 states and 1462 transitions. [2021-06-05 04:44:50,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:50,580 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 04:44:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:50,580 INFO L225 Difference]: With dead ends: 507 [2021-06-05 04:44:50,580 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 04:44:50,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 231.7ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:50,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 04:44:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 296. [2021-06-05 04:44:50,583 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 04:44:50,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2021-06-05 04:44:50,584 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2021-06-05 04:44:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:50,584 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2021-06-05 04:44:50,584 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 04:44:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2021-06-05 04:44:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:50,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:50,584 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:50,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:50,785 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:50,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1475744161, now seen corresponding path program 474 times [2021-06-05 04:44:50,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:50,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901928218] [2021-06-05 04:44:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:50,850 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 04:44:50,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:50,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901928218] [2021-06-05 04:44:50,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901928218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:50,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840907789] [2021-06-05 04:44:50,850 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 04:44:50,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:44:50,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:50,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:50,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:51,119 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 04:44:51,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840907789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:51,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:51,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:51,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12663220] [2021-06-05 04:44:51,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:51,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:51,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:51,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:51,120 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 04:44:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:51,449 INFO L93 Difference]: Finished difference Result 544 states and 1536 transitions. [2021-06-05 04:44:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:44:51,450 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 04:44:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:51,450 INFO L225 Difference]: With dead ends: 544 [2021-06-05 04:44:51,450 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 04:44:51,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:44:51,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 04:44:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 306. [2021-06-05 04:44:51,454 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 04:44:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2021-06-05 04:44:51,454 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2021-06-05 04:44:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:51,454 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2021-06-05 04:44:51,454 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 04:44:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2021-06-05 04:44:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:51,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:51,455 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:51,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4242 [2021-06-05 04:44:51,655 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:51,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:51,655 INFO L82 PathProgramCache]: Analyzing trace with hash -439679765, now seen corresponding path program 475 times [2021-06-05 04:44:51,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:51,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953436073] [2021-06-05 04:44:51,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:51,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:51,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953436073] [2021-06-05 04:44:51,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953436073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:51,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211854879] [2021-06-05 04:44:51,720 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 04:44:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:51,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:51,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:51,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211854879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:51,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:51,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:51,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721794933] [2021-06-05 04:44:51,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:51,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:51,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:51,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:51,959 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 04:44:52,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:52,258 INFO L93 Difference]: Finished difference Result 521 states and 1497 transitions. [2021-06-05 04:44:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:52,258 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 04:44:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:52,259 INFO L225 Difference]: With dead ends: 521 [2021-06-05 04:44:52,259 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 04:44:52,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:44:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 04:44:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2021-06-05 04:44:52,262 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 04:44:52,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 04:44:52,262 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-06-05 04:44:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:52,263 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 04:44:52,263 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 04:44:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 04:44:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:52,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:52,263 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:52,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4254 [2021-06-05 04:44:52,463 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:52,464 INFO L82 PathProgramCache]: Analyzing trace with hash -543113455, now seen corresponding path program 476 times [2021-06-05 04:44:52,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:52,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565706146] [2021-06-05 04:44:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:52,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:52,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565706146] [2021-06-05 04:44:52,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565706146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:52,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689463983] [2021-06-05 04:44:52,526 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 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 04:44:52,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:52,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:52,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:52,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:52,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689463983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:52,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:52,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:52,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721565764] [2021-06-05 04:44:52,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:52,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:52,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:52,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:52,767 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 04:44:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:53,044 INFO L93 Difference]: Finished difference Result 461 states and 1334 transitions. [2021-06-05 04:44:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:53,044 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 04:44:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:53,045 INFO L225 Difference]: With dead ends: 461 [2021-06-05 04:44:53,045 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 04:44:53,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 04:44:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 297. [2021-06-05 04:44:53,047 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 04:44:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-06-05 04:44:53,048 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2021-06-05 04:44:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:53,048 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-06-05 04:44:53,048 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 04:44:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-06-05 04:44:53,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:53,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:53,048 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 04:44:53,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4266 [2021-06-05 04:44:53,249 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:53,249 INFO L82 PathProgramCache]: Analyzing trace with hash 208286983, now seen corresponding path program 477 times [2021-06-05 04:44:53,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:53,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817620745] [2021-06-05 04:44:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:53,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:53,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817620745] [2021-06-05 04:44:53,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817620745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:53,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456553050] [2021-06-05 04:44:53,321 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 04:44:53,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:44:53,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:53,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:53,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:53,597 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 04:44:53,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456553050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:53,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:53,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:53,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035388632] [2021-06-05 04:44:53,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:53,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:53,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:53,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:53,598 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 04:44:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:53,858 INFO L93 Difference]: Finished difference Result 486 states and 1386 transitions. [2021-06-05 04:44:53,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:53,858 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 04:44:53,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:53,859 INFO L225 Difference]: With dead ends: 486 [2021-06-05 04:44:53,859 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 04:44:53,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 374.9ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:44:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 04:44:53,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 307. [2021-06-05 04:44:53,862 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 04:44:53,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2021-06-05 04:44:53,862 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2021-06-05 04:44:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:53,862 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2021-06-05 04:44:53,862 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 04:44:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2021-06-05 04:44:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:53,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:53,863 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 04:44:54,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4273 [2021-06-05 04:44:54,063 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:54,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1707136943, now seen corresponding path program 478 times [2021-06-05 04:44:54,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:54,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066588773] [2021-06-05 04:44:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:54,121 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 04:44:54,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:54,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066588773] [2021-06-05 04:44:54,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066588773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:54,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684169854] [2021-06-05 04:44:54,122 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 04:44:54,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:54,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:54,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:54,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:54,376 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 04:44:54,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684169854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:54,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:54,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:54,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064609617] [2021-06-05 04:44:54,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:54,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:54,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:54,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:54,377 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 04:44:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:54,563 INFO L93 Difference]: Finished difference Result 457 states and 1332 transitions. [2021-06-05 04:44:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:54,563 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 04:44:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:54,563 INFO L225 Difference]: With dead ends: 457 [2021-06-05 04:44:54,563 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 04:44:54,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:54,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 04:44:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 294. [2021-06-05 04:44:54,566 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 04:44:54,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 04:44:54,567 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 04:44:54,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:54,567 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 04:44:54,567 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 04:44:54,567 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 04:44:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:54,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:54,567 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:54,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4283,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:54,768 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:54,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:54,768 INFO L82 PathProgramCache]: Analyzing trace with hash -357170895, now seen corresponding path program 479 times [2021-06-05 04:44:54,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:54,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128471705] [2021-06-05 04:44:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:54,829 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 04:44:54,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:54,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128471705] [2021-06-05 04:44:54,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128471705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:54,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782763808] [2021-06-05 04:44:54,830 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 04:44:54,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:44:54,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:54,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:54,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:55,049 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 04:44:55,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782763808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:55,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:55,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:55,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189104570] [2021-06-05 04:44:55,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:55,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:55,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:55,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:55,049 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 04:44:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:55,294 INFO L93 Difference]: Finished difference Result 586 states and 1637 transitions. [2021-06-05 04:44:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:44:55,295 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 04:44:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:55,295 INFO L225 Difference]: With dead ends: 586 [2021-06-05 04:44:55,295 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 04:44:55,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:44:55,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 04:44:55,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 304. [2021-06-05 04:44:55,300 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 04:44:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2021-06-05 04:44:55,300 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2021-06-05 04:44:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:55,300 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2021-06-05 04:44:55,300 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 04:44:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2021-06-05 04:44:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:55,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:55,301 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:55,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4293 [2021-06-05 04:44:55,501 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:55,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:55,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1851078617, now seen corresponding path program 480 times [2021-06-05 04:44:55,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:55,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672884810] [2021-06-05 04:44:55,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:55,560 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 04:44:55,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:55,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672884810] [2021-06-05 04:44:55,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672884810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:55,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610858929] [2021-06-05 04:44:55,560 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 04:44:55,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:44:55,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:55,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:55,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:55,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610858929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:55,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:55,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:55,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559681587] [2021-06-05 04:44:55,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:55,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:55,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:55,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:55,789 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 04:44:55,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:55,996 INFO L93 Difference]: Finished difference Result 540 states and 1535 transitions. [2021-06-05 04:44:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:55,996 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 04:44:55,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:55,997 INFO L225 Difference]: With dead ends: 540 [2021-06-05 04:44:55,997 INFO L226 Difference]: Without dead ends: 534 [2021-06-05 04:44:55,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:55,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-05 04:44:56,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 307. [2021-06-05 04:44:56,000 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 04:44:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-06-05 04:44:56,001 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-06-05 04:44:56,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:56,001 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-06-05 04:44:56,001 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 04:44:56,001 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-06-05 04:44:56,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:56,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:56,001 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 04:44:56,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4303,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:56,202 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:56,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:56,202 INFO L82 PathProgramCache]: Analyzing trace with hash 394229543, now seen corresponding path program 481 times [2021-06-05 04:44:56,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:56,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941643005] [2021-06-05 04:44:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:56,264 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 04:44:56,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:56,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941643005] [2021-06-05 04:44:56,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941643005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:56,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578557735] [2021-06-05 04:44:56,264 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 04:44:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:56,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:56,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:56,501 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 04:44:56,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578557735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:56,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:56,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:56,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650151088] [2021-06-05 04:44:56,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:56,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:56,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:56,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:56,502 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 04:44:56,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:56,688 INFO L93 Difference]: Finished difference Result 592 states and 1677 transitions. [2021-06-05 04:44:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:56,688 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 04:44:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:56,689 INFO L225 Difference]: With dead ends: 592 [2021-06-05 04:44:56,689 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 04:44:56,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 04:44:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 310. [2021-06-05 04:44:56,693 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 04:44:56,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2021-06-05 04:44:56,693 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2021-06-05 04:44:56,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:56,693 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2021-06-05 04:44:56,693 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 04:44:56,693 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2021-06-05 04:44:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:56,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:56,694 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 04:44:56,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4312,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:56,910 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:56,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1686571943, now seen corresponding path program 482 times [2021-06-05 04:44:56,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:56,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525064289] [2021-06-05 04:44:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:56,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:56,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525064289] [2021-06-05 04:44:56,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525064289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:56,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671870223] [2021-06-05 04:44:56,973 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 04:44:57,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:44:57,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:57,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:57,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:57,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671870223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:57,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:57,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:57,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001281127] [2021-06-05 04:44:57,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:57,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:57,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:57,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:57,188 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 04:44:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:57,348 INFO L93 Difference]: Finished difference Result 555 states and 1595 transitions. [2021-06-05 04:44:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:57,348 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 04:44:57,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:57,349 INFO L225 Difference]: With dead ends: 555 [2021-06-05 04:44:57,349 INFO L226 Difference]: Without dead ends: 555 [2021-06-05 04:44:57,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-06-05 04:44:57,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 307. [2021-06-05 04:44:57,352 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 04:44:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-06-05 04:44:57,353 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-06-05 04:44:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:57,353 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-06-05 04:44:57,353 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 04:44:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-06-05 04:44:57,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:57,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:57,353 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:44:57,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4323,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:44:57,553 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:57,554 INFO L82 PathProgramCache]: Analyzing trace with hash 414966071, now seen corresponding path program 483 times [2021-06-05 04:44:57,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:57,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256267262] [2021-06-05 04:44:57,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:57,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:57,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256267262] [2021-06-05 04:44:57,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256267262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:57,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522984618] [2021-06-05 04:44:57,613 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 04:44:57,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:44:57,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:57,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:57,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:57,826 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 04:44:57,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522984618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:57,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:57,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:57,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148525868] [2021-06-05 04:44:57,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:57,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:57,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:57,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:57,826 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 04:44:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:58,018 INFO L93 Difference]: Finished difference Result 580 states and 1629 transitions. [2021-06-05 04:44:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:58,019 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 04:44:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:58,019 INFO L225 Difference]: With dead ends: 580 [2021-06-05 04:44:58,019 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 04:44:58,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 04:44:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 311. [2021-06-05 04:44:58,023 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 04:44:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-05 04:44:58,023 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-05 04:44:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:58,023 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-05 04:44:58,023 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 04:44:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-05 04:44:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:58,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:58,024 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 04:44:58,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4332 [2021-06-05 04:44:58,224 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:58,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:58,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1500457855, now seen corresponding path program 484 times [2021-06-05 04:44:58,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:58,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647993463] [2021-06-05 04:44:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:58,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:58,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647993463] [2021-06-05 04:44:58,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647993463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:58,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031886475] [2021-06-05 04:44:58,285 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 04:44:58,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:44:58,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:58,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:44:58,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031886475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:58,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:58,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:58,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678964765] [2021-06-05 04:44:58,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:58,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:58,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:58,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:58,497 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 04:44:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:58,745 INFO L93 Difference]: Finished difference Result 586 states and 1650 transitions. [2021-06-05 04:44:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:44:58,745 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 04:44:58,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:58,746 INFO L225 Difference]: With dead ends: 586 [2021-06-05 04:44:58,746 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 04:44:58,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:44:58,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 04:44:58,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 308. [2021-06-05 04:44:58,749 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 04:44:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2021-06-05 04:44:58,750 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2021-06-05 04:44:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:58,750 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2021-06-05 04:44:58,750 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 04:44:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2021-06-05 04:44:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:58,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:58,750 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 04:44:58,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-06-05 04:44:58,951 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:58,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:58,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1718199087, now seen corresponding path program 485 times [2021-06-05 04:44:58,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:58,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543141505] [2021-06-05 04:44:58,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:59,014 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 04:44:59,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543141505] [2021-06-05 04:44:59,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543141505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658546452] [2021-06-05 04:44:59,014 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 04:44:59,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:44:59,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:59,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:59,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:59,247 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 04:44:59,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658546452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:59,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:59,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:59,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786218294] [2021-06-05 04:44:59,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:59,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:59,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:59,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:59,248 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 04:44:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:44:59,408 INFO L93 Difference]: Finished difference Result 516 states and 1495 transitions. [2021-06-05 04:44:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:44:59,408 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 04:44:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:44:59,409 INFO L225 Difference]: With dead ends: 516 [2021-06-05 04:44:59,409 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 04:44:59,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:44:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 04:44:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 309. [2021-06-05 04:44:59,412 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 04:44:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2021-06-05 04:44:59,413 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2021-06-05 04:44:59,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:44:59,413 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2021-06-05 04:44:59,413 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 04:44:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2021-06-05 04:44:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:44:59,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:44:59,413 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 04:44:59,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4352 [2021-06-05 04:44:59,614 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:44:59,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:44:59,614 INFO L82 PathProgramCache]: Analyzing trace with hash -425856687, now seen corresponding path program 486 times [2021-06-05 04:44:59,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:44:59,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191781189] [2021-06-05 04:44:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:44:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:44:59,676 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 04:44:59,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:44:59,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191781189] [2021-06-05 04:44:59,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191781189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:59,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861489365] [2021-06-05 04:44:59,676 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 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 04:44:59,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:44:59,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:44:59,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:44:59,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:44:59,888 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 04:44:59,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861489365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:44:59,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:44:59,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:44:59,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759853466] [2021-06-05 04:44:59,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:44:59,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:44:59,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:44:59,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:44:59,889 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 04:45:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:00,051 INFO L93 Difference]: Finished difference Result 504 states and 1462 transitions. [2021-06-05 04:45:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:00,051 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 04:45:00,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:00,052 INFO L225 Difference]: With dead ends: 504 [2021-06-05 04:45:00,052 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 04:45:00,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:00,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 04:45:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 298. [2021-06-05 04:45:00,055 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 04:45:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 04:45:00,055 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 04:45:00,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:00,055 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 04:45:00,055 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 04:45:00,055 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 04:45:00,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:00,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:00,056 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:00,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4362 [2021-06-05 04:45:00,256 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:00,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:00,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1973245573, now seen corresponding path program 487 times [2021-06-05 04:45:00,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:00,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145223258] [2021-06-05 04:45:00,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:00,316 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 04:45:00,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:00,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145223258] [2021-06-05 04:45:00,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145223258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:00,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723253990] [2021-06-05 04:45:00,316 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 04:45:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:00,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:00,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:00,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723253990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:00,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:00,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:00,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19026384] [2021-06-05 04:45:00,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:00,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:00,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:00,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:00,520 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 04:45:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:00,705 INFO L93 Difference]: Finished difference Result 459 states and 1340 transitions. [2021-06-05 04:45:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:00,705 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 04:45:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:00,705 INFO L225 Difference]: With dead ends: 459 [2021-06-05 04:45:00,706 INFO L226 Difference]: Without dead ends: 459 [2021-06-05 04:45:00,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-05 04:45:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 295. [2021-06-05 04:45:00,708 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 04:45:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2021-06-05 04:45:00,709 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2021-06-05 04:45:00,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:00,709 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2021-06-05 04:45:00,709 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 04:45:00,709 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2021-06-05 04:45:00,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:00,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:00,709 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 04:45:00,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4373 [2021-06-05 04:45:00,910 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:00,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:00,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1330047559, now seen corresponding path program 488 times [2021-06-05 04:45:00,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:00,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492551229] [2021-06-05 04:45:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:00,966 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 04:45:00,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:00,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492551229] [2021-06-05 04:45:00,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492551229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:00,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840429265] [2021-06-05 04:45:00,967 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 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 04:45:01,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:01,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:01,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:01,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840429265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:01,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:01,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:01,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669253197] [2021-06-05 04:45:01,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:01,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:01,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:01,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:01,203 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 04:45:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:01,390 INFO L93 Difference]: Finished difference Result 504 states and 1434 transitions. [2021-06-05 04:45:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:01,390 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 04:45:01,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:01,391 INFO L225 Difference]: With dead ends: 504 [2021-06-05 04:45:01,391 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 04:45:01,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 04:45:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 309. [2021-06-05 04:45:01,394 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 04:45:01,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2021-06-05 04:45:01,394 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2021-06-05 04:45:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:01,395 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2021-06-05 04:45:01,395 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 04:45:01,395 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2021-06-05 04:45:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:01,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:01,395 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 04:45:01,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4378,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:01,595 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:01,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:01,596 INFO L82 PathProgramCache]: Analyzing trace with hash -585376367, now seen corresponding path program 489 times [2021-06-05 04:45:01,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:01,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466125158] [2021-06-05 04:45:01,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:01,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:01,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466125158] [2021-06-05 04:45:01,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466125158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:01,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134848063] [2021-06-05 04:45:01,659 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 04:45:01,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:01,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:01,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:01,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:01,885 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 04:45:01,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134848063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:01,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:01,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:01,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77207777] [2021-06-05 04:45:01,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:01,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:01,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:01,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:01,886 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 04:45:02,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:02,101 INFO L93 Difference]: Finished difference Result 510 states and 1455 transitions. [2021-06-05 04:45:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:02,101 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 04:45:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:02,102 INFO L225 Difference]: With dead ends: 510 [2021-06-05 04:45:02,102 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 04:45:02,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 04:45:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 307. [2021-06-05 04:45:02,105 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 04:45:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-06-05 04:45:02,106 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-06-05 04:45:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:02,106 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-06-05 04:45:02,106 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 04:45:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-06-05 04:45:02,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:02,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:02,106 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:02,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4386 [2021-06-05 04:45:02,307 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:02,307 INFO L82 PathProgramCache]: Analyzing trace with hash 454859431, now seen corresponding path program 490 times [2021-06-05 04:45:02,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:02,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500113940] [2021-06-05 04:45:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:02,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:02,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500113940] [2021-06-05 04:45:02,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500113940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:02,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996000089] [2021-06-05 04:45:02,365 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 04:45:02,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:02,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:02,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:02,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:02,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996000089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:02,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:02,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:02,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710157994] [2021-06-05 04:45:02,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:02,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:02,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:02,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:02,594 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 04:45:02,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:02,792 INFO L93 Difference]: Finished difference Result 479 states and 1390 transitions. [2021-06-05 04:45:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:02,792 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 04:45:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:02,793 INFO L225 Difference]: With dead ends: 479 [2021-06-05 04:45:02,793 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 04:45:02,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 04:45:02,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 294. [2021-06-05 04:45:02,796 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 04:45:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 04:45:02,796 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 04:45:02,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:02,796 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 04:45:02,796 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 04:45:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 04:45:02,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:02,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:02,797 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:02,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4395,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:02,997 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2054608897, now seen corresponding path program 491 times [2021-06-05 04:45:02,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:02,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249819630] [2021-06-05 04:45:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:03,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:03,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249819630] [2021-06-05 04:45:03,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249819630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:03,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096524165] [2021-06-05 04:45:03,048 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 04:45:03,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:03,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:03,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:03,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096524165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:03,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:03,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:03,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824098733] [2021-06-05 04:45:03,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:03,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:03,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:03,255 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 04:45:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:03,434 INFO L93 Difference]: Finished difference Result 451 states and 1306 transitions. [2021-06-05 04:45:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:03,434 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 04:45:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:03,434 INFO L225 Difference]: With dead ends: 451 [2021-06-05 04:45:03,434 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 04:45:03,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 04:45:03,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 298. [2021-06-05 04:45:03,437 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 04:45:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2021-06-05 04:45:03,437 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2021-06-05 04:45:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:03,438 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2021-06-05 04:45:03,438 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 04:45:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2021-06-05 04:45:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:03,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:03,438 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 04:45:03,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4404,494 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:03,638 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:03,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:03,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1488957961, now seen corresponding path program 492 times [2021-06-05 04:45:03,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:03,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311594920] [2021-06-05 04:45:03,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:03,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:03,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311594920] [2021-06-05 04:45:03,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311594920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:03,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080741495] [2021-06-05 04:45:03,693 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 04:45:03,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:03,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:03,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:03,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:03,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:03,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080741495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:03,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:03,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:03,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707904702] [2021-06-05 04:45:03,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:03,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:03,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:03,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:03,950 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 04:45:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:04,214 INFO L93 Difference]: Finished difference Result 476 states and 1358 transitions. [2021-06-05 04:45:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:04,214 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 04:45:04,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:04,215 INFO L225 Difference]: With dead ends: 476 [2021-06-05 04:45:04,215 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 04:45:04,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:04,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 04:45:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 308. [2021-06-05 04:45:04,218 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 04:45:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2021-06-05 04:45:04,219 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2021-06-05 04:45:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:04,219 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2021-06-05 04:45:04,219 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 04:45:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2021-06-05 04:45:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:04,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:04,219 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:04,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4410,495 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:04,420 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:04,420 INFO L82 PathProgramCache]: Analyzing trace with hash 890585409, now seen corresponding path program 493 times [2021-06-05 04:45:04,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:04,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605227619] [2021-06-05 04:45:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:04,482 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 04:45:04,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:04,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605227619] [2021-06-05 04:45:04,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605227619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:04,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894574800] [2021-06-05 04:45:04,482 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 04:45:04,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:04,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:04,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:04,700 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 04:45:04,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894574800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:04,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:04,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:04,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145243490] [2021-06-05 04:45:04,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:04,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:04,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:04,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:04,701 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 04:45:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:04,862 INFO L93 Difference]: Finished difference Result 447 states and 1304 transitions. [2021-06-05 04:45:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:04,862 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 04:45:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:04,863 INFO L225 Difference]: With dead ends: 447 [2021-06-05 04:45:04,863 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 04:45:04,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 04:45:04,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 296. [2021-06-05 04:45:04,866 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 04:45:04,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2021-06-05 04:45:04,866 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2021-06-05 04:45:04,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:04,866 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2021-06-05 04:45:04,866 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 04:45:04,866 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2021-06-05 04:45:04,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:04,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:04,866 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:05,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4418,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:05,067 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:05,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:05,067 INFO L82 PathProgramCache]: Analyzing trace with hash 693580705, now seen corresponding path program 494 times [2021-06-05 04:45:05,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:05,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499442542] [2021-06-05 04:45:05,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:05,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:05,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499442542] [2021-06-05 04:45:05,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499442542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:05,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823178455] [2021-06-05 04:45:05,142 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 04:45:05,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:05,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:05,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:05,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:05,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823178455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:05,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:05,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:05,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859750643] [2021-06-05 04:45:05,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:05,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:05,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:05,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:05,347 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 04:45:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:05,546 INFO L93 Difference]: Finished difference Result 482 states and 1373 transitions. [2021-06-05 04:45:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:05,547 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 04:45:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:05,547 INFO L225 Difference]: With dead ends: 482 [2021-06-05 04:45:05,547 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 04:45:05,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 04:45:05,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 310. [2021-06-05 04:45:05,550 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 04:45:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2021-06-05 04:45:05,551 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2021-06-05 04:45:05,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:05,551 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2021-06-05 04:45:05,551 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 04:45:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2021-06-05 04:45:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:05,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:05,551 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:05,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4424,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:05,752 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1221843221, now seen corresponding path program 495 times [2021-06-05 04:45:05,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:05,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430206018] [2021-06-05 04:45:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:05,816 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 04:45:05,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:05,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430206018] [2021-06-05 04:45:05,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430206018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:05,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301564718] [2021-06-05 04:45:05,816 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 04:45:05,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:05,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:05,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:05,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:06,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301564718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:06,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:06,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:06,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90118472] [2021-06-05 04:45:06,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:06,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:06,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:06,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:06,029 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 04:45:06,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:06,225 INFO L93 Difference]: Finished difference Result 482 states and 1379 transitions. [2021-06-05 04:45:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:06,226 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 04:45:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:06,226 INFO L225 Difference]: With dead ends: 482 [2021-06-05 04:45:06,226 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 04:45:06,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:06,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 04:45:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 308. [2021-06-05 04:45:06,229 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 04:45:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2021-06-05 04:45:06,230 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2021-06-05 04:45:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:06,230 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2021-06-05 04:45:06,230 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 04:45:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2021-06-05 04:45:06,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:06,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:06,230 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 04:45:06,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4430 [2021-06-05 04:45:06,431 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:06,431 INFO L82 PathProgramCache]: Analyzing trace with hash -181607423, now seen corresponding path program 496 times [2021-06-05 04:45:06,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:06,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073949429] [2021-06-05 04:45:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:06,489 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 04:45:06,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:06,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073949429] [2021-06-05 04:45:06,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073949429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:06,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550947363] [2021-06-05 04:45:06,489 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 04:45:06,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:06,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:06,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:06,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550947363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:06,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:06,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:06,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863472961] [2021-06-05 04:45:06,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:06,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:06,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:06,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:06,670 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 04:45:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:06,855 INFO L93 Difference]: Finished difference Result 457 states and 1329 transitions. [2021-06-05 04:45:06,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:06,855 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 04:45:06,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:06,856 INFO L225 Difference]: With dead ends: 457 [2021-06-05 04:45:06,856 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 04:45:06,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:45:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 04:45:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 293. [2021-06-05 04:45:06,859 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 04:45:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-06-05 04:45:06,859 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-06-05 04:45:06,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:06,859 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-06-05 04:45:06,859 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 04:45:06,859 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-06-05 04:45:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:06,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:06,860 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:07,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4435,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:07,069 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:07,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:07,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2140630069, now seen corresponding path program 497 times [2021-06-05 04:45:07,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:07,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397781769] [2021-06-05 04:45:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:07,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:07,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397781769] [2021-06-05 04:45:07,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397781769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:07,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982950766] [2021-06-05 04:45:07,155 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 04:45:07,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:07,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:07,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:07,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:07,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982950766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:07,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:07,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:07,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616465030] [2021-06-05 04:45:07,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:07,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:07,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:07,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:07,536 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 04:45:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:07,779 INFO L93 Difference]: Finished difference Result 529 states and 1491 transitions. [2021-06-05 04:45:07,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:07,780 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 04:45:07,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:07,780 INFO L225 Difference]: With dead ends: 529 [2021-06-05 04:45:07,780 INFO L226 Difference]: Without dead ends: 511 [2021-06-05 04:45:07,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:07,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-06-05 04:45:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 297. [2021-06-05 04:45:07,783 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 04:45:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-06-05 04:45:07,784 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-06-05 04:45:07,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:07,784 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-06-05 04:45:07,784 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 04:45:07,784 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-06-05 04:45:07,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:07,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:07,784 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:07,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4438 [2021-06-05 04:45:07,985 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:07,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:07,985 INFO L82 PathProgramCache]: Analyzing trace with hash -128273967, now seen corresponding path program 498 times [2021-06-05 04:45:07,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:07,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772670933] [2021-06-05 04:45:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:08,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:08,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772670933] [2021-06-05 04:45:08,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772670933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:08,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670506921] [2021-06-05 04:45:08,034 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 04:45:08,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:08,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:08,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:08,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670506921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:08,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:08,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:08,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129713488] [2021-06-05 04:45:08,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:08,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:08,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:08,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:08,244 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 04:45:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:08,487 INFO L93 Difference]: Finished difference Result 525 states and 1483 transitions. [2021-06-05 04:45:08,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:08,488 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 04:45:08,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:08,488 INFO L225 Difference]: With dead ends: 525 [2021-06-05 04:45:08,488 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 04:45:08,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 04:45:08,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 299. [2021-06-05 04:45:08,492 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 04:45:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-06-05 04:45:08,492 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-06-05 04:45:08,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:08,492 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-06-05 04:45:08,492 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 04:45:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-06-05 04:45:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:08,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:08,493 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 04:45:08,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4443,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:08,693 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:08,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:08,693 INFO L82 PathProgramCache]: Analyzing trace with hash 623126471, now seen corresponding path program 499 times [2021-06-05 04:45:08,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:08,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113208708] [2021-06-05 04:45:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:08,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:08,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113208708] [2021-06-05 04:45:08,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113208708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:08,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591204766] [2021-06-05 04:45:08,747 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 04:45:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:08,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:08,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:08,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:08,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591204766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:08,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:08,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:08,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539038182] [2021-06-05 04:45:08,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:08,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:08,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:08,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:08,958 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 04:45:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:09,287 INFO L93 Difference]: Finished difference Result 550 states and 1535 transitions. [2021-06-05 04:45:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:09,288 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 04:45:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:09,288 INFO L225 Difference]: With dead ends: 550 [2021-06-05 04:45:09,288 INFO L226 Difference]: Without dead ends: 544 [2021-06-05 04:45:09,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 331.2ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:45:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-05 04:45:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 309. [2021-06-05 04:45:09,292 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 04:45:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-05 04:45:09,292 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-06-05 04:45:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:09,292 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-05 04:45:09,292 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 04:45:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-05 04:45:09,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:09,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:09,293 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:09,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4448 [2021-06-05 04:45:09,493 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:09,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1292297455, now seen corresponding path program 500 times [2021-06-05 04:45:09,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:09,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771669078] [2021-06-05 04:45:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:09,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:09,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771669078] [2021-06-05 04:45:09,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771669078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:09,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754131397] [2021-06-05 04:45:09,545 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 04:45:09,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:09,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:09,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:09,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:09,753 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 04:45:09,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754131397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:09,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:09,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:09,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464579250] [2021-06-05 04:45:09,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:09,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:09,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:09,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:09,754 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 04:45:09,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:09,980 INFO L93 Difference]: Finished difference Result 521 states and 1481 transitions. [2021-06-05 04:45:09,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:09,980 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 04:45:09,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:09,981 INFO L225 Difference]: With dead ends: 521 [2021-06-05 04:45:09,981 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 04:45:09,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 04:45:09,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 295. [2021-06-05 04:45:09,984 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 04:45:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2021-06-05 04:45:09,984 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2021-06-05 04:45:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:09,984 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2021-06-05 04:45:09,984 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 04:45:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2021-06-05 04:45:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:09,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:09,985 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 04:45:10,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4455,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:10,185 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:10,186 INFO L82 PathProgramCache]: Analyzing trace with hash -764740821, now seen corresponding path program 501 times [2021-06-05 04:45:10,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:10,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788121041] [2021-06-05 04:45:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:10,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:10,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788121041] [2021-06-05 04:45:10,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788121041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:10,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223982084] [2021-06-05 04:45:10,232 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 04:45:10,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:45:10,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:10,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:10,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:10,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:10,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223982084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:10,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:10,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:10,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058517566] [2021-06-05 04:45:10,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:10,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:10,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:10,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:10,420 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 04:45:10,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:10,614 INFO L93 Difference]: Finished difference Result 470 states and 1352 transitions. [2021-06-05 04:45:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:10,614 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 04:45:10,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:10,615 INFO L225 Difference]: With dead ends: 470 [2021-06-05 04:45:10,615 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 04:45:10,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:10,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 04:45:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 299. [2021-06-05 04:45:10,618 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 04:45:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-06-05 04:45:10,618 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-06-05 04:45:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:10,618 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-06-05 04:45:10,618 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 04:45:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-06-05 04:45:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:10,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:10,619 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:10,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4461 [2021-06-05 04:45:10,819 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:10,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:10,819 INFO L82 PathProgramCache]: Analyzing trace with hash -13340383, now seen corresponding path program 502 times [2021-06-05 04:45:10,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:10,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811986377] [2021-06-05 04:45:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:10,866 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 04:45:10,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:10,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811986377] [2021-06-05 04:45:10,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811986377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:10,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121826627] [2021-06-05 04:45:10,867 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 04:45:10,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:10,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:10,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:10,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:11,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:11,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121826627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:11,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:11,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:11,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330876435] [2021-06-05 04:45:11,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:11,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:11,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:11,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:11,056 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 04:45:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:11,290 INFO L93 Difference]: Finished difference Result 495 states and 1404 transitions. [2021-06-05 04:45:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:11,291 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 04:45:11,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:11,291 INFO L225 Difference]: With dead ends: 495 [2021-06-05 04:45:11,291 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:45:11,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:45:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 309. [2021-06-05 04:45:11,294 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 04:45:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-05 04:45:11,295 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-06-05 04:45:11,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:11,295 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-05 04:45:11,295 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 04:45:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-05 04:45:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:11,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:11,295 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 04:45:11,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4466,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:11,496 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:11,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1928764309, now seen corresponding path program 503 times [2021-06-05 04:45:11,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:11,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911894570] [2021-06-05 04:45:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:11,547 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 04:45:11,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:11,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911894570] [2021-06-05 04:45:11,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911894570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:11,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276689571] [2021-06-05 04:45:11,548 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 04:45:11,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:11,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:11,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:11,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:11,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276689571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:11,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:11,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:11,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584511388] [2021-06-05 04:45:11,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:11,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:11,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:11,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:11,739 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 04:45:11,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:11,898 INFO L93 Difference]: Finished difference Result 466 states and 1350 transitions. [2021-06-05 04:45:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:11,898 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 04:45:11,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:11,899 INFO L225 Difference]: With dead ends: 466 [2021-06-05 04:45:11,899 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 04:45:11,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 04:45:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 297. [2021-06-05 04:45:11,902 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 04:45:11,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-06-05 04:45:11,902 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-06-05 04:45:11,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:11,902 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-06-05 04:45:11,902 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 04:45:11,903 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-06-05 04:45:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:11,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:11,903 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:12,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4472 [2021-06-05 04:45:12,103 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:12,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:12,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2125769013, now seen corresponding path program 504 times [2021-06-05 04:45:12,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:12,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020814699] [2021-06-05 04:45:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:12,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:12,150 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 04:45:12,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:12,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020814699] [2021-06-05 04:45:12,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020814699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:12,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184021340] [2021-06-05 04:45:12,151 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 04:45:12,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:12,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:12,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:12,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:12,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184021340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:12,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:12,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:12,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347432935] [2021-06-05 04:45:12,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:12,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:12,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:12,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:12,334 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 04:45:12,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:12,502 INFO L93 Difference]: Finished difference Result 501 states and 1419 transitions. [2021-06-05 04:45:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:12,503 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 04:45:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:12,503 INFO L225 Difference]: With dead ends: 501 [2021-06-05 04:45:12,503 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 04:45:12,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:12,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 04:45:12,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 311. [2021-06-05 04:45:12,507 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 04:45:12,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2021-06-05 04:45:12,507 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2021-06-05 04:45:12,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:12,507 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2021-06-05 04:45:12,507 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 04:45:12,507 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2021-06-05 04:45:12,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:12,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:12,508 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 04:45:12,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4478,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:12,708 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:12,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:12,708 INFO L82 PathProgramCache]: Analyzing trace with hash 253774357, now seen corresponding path program 505 times [2021-06-05 04:45:12,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:12,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644923741] [2021-06-05 04:45:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:12,756 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 04:45:12,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:12,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644923741] [2021-06-05 04:45:12,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644923741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:12,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513025418] [2021-06-05 04:45:12,757 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 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 04:45:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:12,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:12,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:12,939 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 04:45:12,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513025418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:12,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:12,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:12,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955580789] [2021-06-05 04:45:12,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:12,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:12,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:12,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:12,940 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 04:45:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:13,141 INFO L93 Difference]: Finished difference Result 501 states and 1425 transitions. [2021-06-05 04:45:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:13,141 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 04:45:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:13,142 INFO L225 Difference]: With dead ends: 501 [2021-06-05 04:45:13,142 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 04:45:13,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 04:45:13,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 309. [2021-06-05 04:45:13,145 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 04:45:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2021-06-05 04:45:13,146 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2021-06-05 04:45:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:13,146 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2021-06-05 04:45:13,146 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 04:45:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2021-06-05 04:45:13,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:13,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:13,146 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:13,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4484,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:13,347 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:13,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:13,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1294010155, now seen corresponding path program 506 times [2021-06-05 04:45:13,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:13,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430055818] [2021-06-05 04:45:13,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:13,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:13,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430055818] [2021-06-05 04:45:13,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430055818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:13,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188046543] [2021-06-05 04:45:13,408 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 04:45:13,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:13,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:13,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:13,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:13,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188046543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:13,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:13,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:45:13,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596653829] [2021-06-05 04:45:13,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:45:13,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:13,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:45:13,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:45:13,576 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 04:45:13,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:13,747 INFO L93 Difference]: Finished difference Result 476 states and 1375 transitions. [2021-06-05 04:45:13,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:13,747 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 04:45:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:13,748 INFO L225 Difference]: With dead ends: 476 [2021-06-05 04:45:13,748 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 04:45:13,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:45:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 04:45:13,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 292. [2021-06-05 04:45:13,751 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 04:45:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-06-05 04:45:13,751 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-06-05 04:45:13,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:13,751 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-06-05 04:45:13,751 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 04:45:13,751 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-06-05 04:45:13,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:13,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:13,752 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:13,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4489,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:13,952 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:13,952 INFO L82 PathProgramCache]: Analyzing trace with hash -597379255, now seen corresponding path program 507 times [2021-06-05 04:45:13,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:13,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312727990] [2021-06-05 04:45:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:14,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:14,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312727990] [2021-06-05 04:45:14,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312727990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:14,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615397816] [2021-06-05 04:45:14,012 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 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 04:45:14,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:45:14,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:14,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:14,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:14,268 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 04:45:14,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615397816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:14,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:14,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:14,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575112822] [2021-06-05 04:45:14,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:14,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:14,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:14,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:14,268 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 04:45:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:14,468 INFO L93 Difference]: Finished difference Result 481 states and 1385 transitions. [2021-06-05 04:45:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:14,468 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 04:45:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:14,469 INFO L225 Difference]: With dead ends: 481 [2021-06-05 04:45:14,469 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 04:45:14,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:14,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 04:45:14,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 301. [2021-06-05 04:45:14,472 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 04:45:14,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 896 transitions. [2021-06-05 04:45:14,473 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 896 transitions. Word has length 20 [2021-06-05 04:45:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:14,473 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 896 transitions. [2021-06-05 04:45:14,473 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 04:45:14,473 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 896 transitions. [2021-06-05 04:45:14,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:14,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:14,473 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:14,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4492 [2021-06-05 04:45:14,674 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:14,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2091286977, now seen corresponding path program 508 times [2021-06-05 04:45:14,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:14,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007372891] [2021-06-05 04:45:14,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:14,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:14,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007372891] [2021-06-05 04:45:14,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007372891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:14,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711502086] [2021-06-05 04:45:14,731 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 04:45:14,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:14,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:14,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:14,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711502086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:14,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:14,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:14,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005502672] [2021-06-05 04:45:14,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:14,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:14,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:14,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:14,978 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 04:45:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:15,274 INFO L93 Difference]: Finished difference Result 487 states and 1392 transitions. [2021-06-05 04:45:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:15,274 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 04:45:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:15,275 INFO L225 Difference]: With dead ends: 487 [2021-06-05 04:45:15,275 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 04:45:15,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 04:45:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 298. [2021-06-05 04:45:15,278 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 04:45:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 04:45:15,278 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 04:45:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:15,278 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 04:45:15,279 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 04:45:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 04:45:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:15,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:15,279 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:15,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4500,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:15,480 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1553431399, now seen corresponding path program 509 times [2021-06-05 04:45:15,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:15,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379843589] [2021-06-05 04:45:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:15,542 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 04:45:15,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:15,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379843589] [2021-06-05 04:45:15,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379843589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:15,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174733713] [2021-06-05 04:45:15,542 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 04:45:15,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:15,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:15,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:15,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174733713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:15,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:15,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:15,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19539100] [2021-06-05 04:45:15,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:15,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:15,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:15,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:15,791 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 04:45:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:16,026 INFO L93 Difference]: Finished difference Result 451 states and 1310 transitions. [2021-06-05 04:45:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:16,026 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 04:45:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:16,026 INFO L225 Difference]: With dead ends: 451 [2021-06-05 04:45:16,026 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 04:45:16,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:16,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 04:45:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 295. [2021-06-05 04:45:16,030 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 04:45:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 04:45:16,030 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-06-05 04:45:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:16,030 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 04:45:16,030 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 04:45:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 04:45:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:16,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:16,031 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 04:45:16,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4508 [2021-06-05 04:45:16,237 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:16,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:16,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1221197843, now seen corresponding path program 510 times [2021-06-05 04:45:16,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:16,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775647036] [2021-06-05 04:45:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:16,298 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 04:45:16,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:16,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775647036] [2021-06-05 04:45:16,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775647036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:16,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220381486] [2021-06-05 04:45:16,299 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 04:45:16,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:16,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:16,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:16,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:16,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220381486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:16,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:16,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:16,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427818898] [2021-06-05 04:45:16,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:16,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:16,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:16,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:16,548 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 04:45:16,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:16,842 INFO L93 Difference]: Finished difference Result 568 states and 1603 transitions. [2021-06-05 04:45:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:16,842 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 04:45:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:16,842 INFO L225 Difference]: With dead ends: 568 [2021-06-05 04:45:16,843 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 04:45:16,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:45:16,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 04:45:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 303. [2021-06-05 04:45:16,846 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 04:45:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 910 transitions. [2021-06-05 04:45:16,847 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 910 transitions. Word has length 20 [2021-06-05 04:45:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:16,847 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 910 transitions. [2021-06-05 04:45:16,847 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 04:45:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 910 transitions. [2021-06-05 04:45:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:16,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:16,847 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:17,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4515,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:17,048 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:17,048 INFO L82 PathProgramCache]: Analyzing trace with hash -272709879, now seen corresponding path program 511 times [2021-06-05 04:45:17,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:17,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668526351] [2021-06-05 04:45:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:17,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:17,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668526351] [2021-06-05 04:45:17,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668526351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:17,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461536983] [2021-06-05 04:45:17,107 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 04:45:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:17,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:17,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:17,387 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 04:45:17,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461536983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:17,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:17,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:17,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798923351] [2021-06-05 04:45:17,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:17,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:17,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:17,387 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 04:45:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:17,738 INFO L93 Difference]: Finished difference Result 574 states and 1604 transitions. [2021-06-05 04:45:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:17,738 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 04:45:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:17,739 INFO L225 Difference]: With dead ends: 574 [2021-06-05 04:45:17,739 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 04:45:17,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 04:45:17,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 306. [2021-06-05 04:45:17,742 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 04:45:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 912 transitions. [2021-06-05 04:45:17,743 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 912 transitions. Word has length 20 [2021-06-05 04:45:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:17,743 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 912 transitions. [2021-06-05 04:45:17,743 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 04:45:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 912 transitions. [2021-06-05 04:45:17,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:17,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:17,743 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 04:45:17,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4525,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:17,944 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:17,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:17,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1972598281, now seen corresponding path program 512 times [2021-06-05 04:45:17,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:17,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333529617] [2021-06-05 04:45:17,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:18,008 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 04:45:18,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:18,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333529617] [2021-06-05 04:45:18,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333529617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:18,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787780414] [2021-06-05 04:45:18,008 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 04:45:18,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:18,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:18,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:18,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:18,264 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 04:45:18,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787780414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:18,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:18,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:18,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012223843] [2021-06-05 04:45:18,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:18,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:18,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:18,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:18,264 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 04:45:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:18,486 INFO L93 Difference]: Finished difference Result 536 states and 1524 transitions. [2021-06-05 04:45:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:18,486 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 04:45:18,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:18,487 INFO L225 Difference]: With dead ends: 536 [2021-06-05 04:45:18,487 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 04:45:18,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 04:45:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 299. [2021-06-05 04:45:18,490 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 04:45:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 894 transitions. [2021-06-05 04:45:18,491 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 894 transitions. Word has length 20 [2021-06-05 04:45:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:18,491 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 894 transitions. [2021-06-05 04:45:18,491 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 04:45:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 894 transitions. [2021-06-05 04:45:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:18,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:18,491 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:18,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4535,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:18,692 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:18,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1030026615, now seen corresponding path program 513 times [2021-06-05 04:45:18,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:18,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917280769] [2021-06-05 04:45:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:18,753 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 04:45:18,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:18,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917280769] [2021-06-05 04:45:18,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917280769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:18,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200075899] [2021-06-05 04:45:18,754 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 04:45:18,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:18,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:18,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:18,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:18,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200075899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:18,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:18,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:18,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005337380] [2021-06-05 04:45:18,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:18,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:18,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:18,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:18,996 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 04:45:19,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:19,173 INFO L93 Difference]: Finished difference Result 499 states and 1442 transitions. [2021-06-05 04:45:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:19,173 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 04:45:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:19,174 INFO L225 Difference]: With dead ends: 499 [2021-06-05 04:45:19,174 INFO L226 Difference]: Without dead ends: 499 [2021-06-05 04:45:19,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-06-05 04:45:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 296. [2021-06-05 04:45:19,177 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 04:45:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 879 transitions. [2021-06-05 04:45:19,178 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 879 transitions. Word has length 20 [2021-06-05 04:45:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:19,178 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 879 transitions. [2021-06-05 04:45:19,178 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 04:45:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 879 transitions. [2021-06-05 04:45:19,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:19,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:19,178 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:19,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4545,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:19,379 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:19,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:19,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1993334809, now seen corresponding path program 514 times [2021-06-05 04:45:19,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:19,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023009532] [2021-06-05 04:45:19,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:19,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:19,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:19,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023009532] [2021-06-05 04:45:19,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023009532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:19,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514146939] [2021-06-05 04:45:19,438 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 04:45:19,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:19,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:19,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:19,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:19,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514146939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:19,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:19,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:19,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375740134] [2021-06-05 04:45:19,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:19,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:19,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:19,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:19,719 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 04:45:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:20,091 INFO L93 Difference]: Finished difference Result 536 states and 1516 transitions. [2021-06-05 04:45:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:45:20,092 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 04:45:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:20,092 INFO L225 Difference]: With dead ends: 536 [2021-06-05 04:45:20,092 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 04:45:20,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:20,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 04:45:20,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 306. [2021-06-05 04:45:20,096 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 04:45:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 906 transitions. [2021-06-05 04:45:20,096 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 906 transitions. Word has length 20 [2021-06-05 04:45:20,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:20,096 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 906 transitions. [2021-06-05 04:45:20,096 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 04:45:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 906 transitions. [2021-06-05 04:45:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:20,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:20,097 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 04:45:20,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4554,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:20,297 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:20,297 INFO L82 PathProgramCache]: Analyzing trace with hash 77910883, now seen corresponding path program 515 times [2021-06-05 04:45:20,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:20,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619170747] [2021-06-05 04:45:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:20,360 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 04:45:20,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:20,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619170747] [2021-06-05 04:45:20,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619170747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:20,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936398944] [2021-06-05 04:45:20,361 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 04:45:20,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:20,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:20,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:20,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:20,606 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 04:45:20,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936398944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:20,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:20,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:20,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054924709] [2021-06-05 04:45:20,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:20,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:20,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:20,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:20,606 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 04:45:20,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:20,909 INFO L93 Difference]: Finished difference Result 513 states and 1477 transitions. [2021-06-05 04:45:20,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:20,909 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 04:45:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:20,910 INFO L225 Difference]: With dead ends: 513 [2021-06-05 04:45:20,910 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 04:45:20,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:45:20,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 04:45:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 295. [2021-06-05 04:45:20,913 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 04:45:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 874 transitions. [2021-06-05 04:45:20,913 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 874 transitions. Word has length 20 [2021-06-05 04:45:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:20,913 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 874 transitions. [2021-06-05 04:45:20,914 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 04:45:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 874 transitions. [2021-06-05 04:45:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:20,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:20,914 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 04:45:21,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4564,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:21,114 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:21,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:21,115 INFO L82 PathProgramCache]: Analyzing trace with hash -25522807, now seen corresponding path program 516 times [2021-06-05 04:45:21,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:21,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312166185] [2021-06-05 04:45:21,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:21,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:21,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312166185] [2021-06-05 04:45:21,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312166185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:21,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214459372] [2021-06-05 04:45:21,171 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 04:45:21,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:21,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:21,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:21,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:21,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214459372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:21,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:21,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:21,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064177697] [2021-06-05 04:45:21,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:21,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:21,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:21,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:21,414 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 04:45:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:21,662 INFO L93 Difference]: Finished difference Result 453 states and 1314 transitions. [2021-06-05 04:45:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:21,662 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 04:45:21,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:21,662 INFO L225 Difference]: With dead ends: 453 [2021-06-05 04:45:21,662 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 04:45:21,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 328.4ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:21,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 04:45:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 297. [2021-06-05 04:45:21,665 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 04:45:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-06-05 04:45:21,666 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 20 [2021-06-05 04:45:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:21,666 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-06-05 04:45:21,666 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 04:45:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-06-05 04:45:21,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:21,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:21,666 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:21,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4574 [2021-06-05 04:45:21,866 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:21,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:21,867 INFO L82 PathProgramCache]: Analyzing trace with hash 725877631, now seen corresponding path program 517 times [2021-06-05 04:45:21,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:21,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352288861] [2021-06-05 04:45:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:21,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:21,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352288861] [2021-06-05 04:45:21,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352288861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:21,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214715225] [2021-06-05 04:45:21,930 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 04:45:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:22,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:22,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:22,172 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 04:45:22,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214715225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:22,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:22,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:22,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144414388] [2021-06-05 04:45:22,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:22,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:22,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:22,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:22,173 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 04:45:22,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:22,492 INFO L93 Difference]: Finished difference Result 478 states and 1366 transitions. [2021-06-05 04:45:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:22,492 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 04:45:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:22,493 INFO L225 Difference]: With dead ends: 478 [2021-06-05 04:45:22,493 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 04:45:22,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:45:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 04:45:22,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 307. [2021-06-05 04:45:22,496 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 04:45:22,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 906 transitions. [2021-06-05 04:45:22,497 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 906 transitions. Word has length 20 [2021-06-05 04:45:22,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:22,497 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 906 transitions. [2021-06-05 04:45:22,497 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 04:45:22,497 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 906 transitions. [2021-06-05 04:45:22,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:22,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:22,497 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:22,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4581 [2021-06-05 04:45:22,698 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:22,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1189546295, now seen corresponding path program 518 times [2021-06-05 04:45:22,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:22,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942131644] [2021-06-05 04:45:22,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:22,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:22,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942131644] [2021-06-05 04:45:22,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942131644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:22,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878637891] [2021-06-05 04:45:22,769 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 04:45:22,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:22,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:22,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:22,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:23,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878637891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:23,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:23,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:23,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222118881] [2021-06-05 04:45:23,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:23,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:23,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:23,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:23,039 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 04:45:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:23,240 INFO L93 Difference]: Finished difference Result 449 states and 1312 transitions. [2021-06-05 04:45:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:23,241 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 04:45:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:23,241 INFO L225 Difference]: With dead ends: 449 [2021-06-05 04:45:23,241 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 04:45:23,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 04:45:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 294. [2021-06-05 04:45:23,244 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 04:45:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 04:45:23,245 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 04:45:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:23,245 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 04:45:23,245 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 04:45:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 04:45:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:23,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:23,245 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 04:45:23,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4591 [2021-06-05 04:45:23,446 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:23,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:23,446 INFO L82 PathProgramCache]: Analyzing trace with hash 160419753, now seen corresponding path program 519 times [2021-06-05 04:45:23,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:23,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595885495] [2021-06-05 04:45:23,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:23,508 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 04:45:23,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:23,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595885495] [2021-06-05 04:45:23,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595885495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:23,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709799498] [2021-06-05 04:45:23,508 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 04:45:23,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:23,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:23,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:23,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:23,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709799498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:23,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:23,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:23,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838058868] [2021-06-05 04:45:23,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:23,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:23,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:23,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:23,755 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 04:45:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:24,011 INFO L93 Difference]: Finished difference Result 578 states and 1617 transitions. [2021-06-05 04:45:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:24,011 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 04:45:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:24,012 INFO L225 Difference]: With dead ends: 578 [2021-06-05 04:45:24,012 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 04:45:24,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 287.9ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:45:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 04:45:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 304. [2021-06-05 04:45:24,015 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 04:45:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 914 transitions. [2021-06-05 04:45:24,016 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 914 transitions. Word has length 20 [2021-06-05 04:45:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:24,016 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 914 transitions. [2021-06-05 04:45:24,016 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 04:45:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 914 transitions. [2021-06-05 04:45:24,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:24,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:24,016 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:24,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4600,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:24,217 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:24,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:24,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1333487969, now seen corresponding path program 520 times [2021-06-05 04:45:24,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:24,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990852788] [2021-06-05 04:45:24,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:24,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:24,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990852788] [2021-06-05 04:45:24,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990852788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:24,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322736440] [2021-06-05 04:45:24,276 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 04:45:24,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:24,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:24,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:24,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:24,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322736440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:24,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:24,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:24,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705529463] [2021-06-05 04:45:24,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:24,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:24,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:24,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:24,500 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 04:45:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:24,717 INFO L93 Difference]: Finished difference Result 532 states and 1515 transitions. [2021-06-05 04:45:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:24,717 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 04:45:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:24,718 INFO L225 Difference]: With dead ends: 532 [2021-06-05 04:45:24,718 INFO L226 Difference]: Without dead ends: 526 [2021-06-05 04:45:24,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-05 04:45:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 307. [2021-06-05 04:45:24,721 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 04:45:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-06-05 04:45:24,721 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-06-05 04:45:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:24,722 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-06-05 04:45:24,722 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 04:45:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-06-05 04:45:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:24,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:24,722 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 04:45:24,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4609 [2021-06-05 04:45:24,922 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:24,923 INFO L82 PathProgramCache]: Analyzing trace with hash 911820191, now seen corresponding path program 521 times [2021-06-05 04:45:24,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:24,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296615056] [2021-06-05 04:45:24,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:24,993 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 04:45:24,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:24,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296615056] [2021-06-05 04:45:24,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296615056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:24,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626346778] [2021-06-05 04:45:24,993 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 04:45:25,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:25,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:25,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:25,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:25,231 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 04:45:25,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626346778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:25,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:25,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:25,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637476759] [2021-06-05 04:45:25,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:25,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:25,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:25,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:25,232 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 04:45:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:25,415 INFO L93 Difference]: Finished difference Result 584 states and 1657 transitions. [2021-06-05 04:45:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:25,415 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 04:45:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:25,416 INFO L225 Difference]: With dead ends: 584 [2021-06-05 04:45:25,416 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 04:45:25,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 216.5ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 04:45:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 310. [2021-06-05 04:45:25,419 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 04:45:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 931 transitions. [2021-06-05 04:45:25,420 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 931 transitions. Word has length 20 [2021-06-05 04:45:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:25,420 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 931 transitions. [2021-06-05 04:45:25,420 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 04:45:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 931 transitions. [2021-06-05 04:45:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:25,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:25,420 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:25,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4619,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:25,621 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:25,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2090804705, now seen corresponding path program 522 times [2021-06-05 04:45:25,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:25,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867499356] [2021-06-05 04:45:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:25,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:25,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:25,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867499356] [2021-06-05 04:45:25,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867499356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:25,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091091560] [2021-06-05 04:45:25,685 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 04:45:25,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:25,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:25,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:25,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:25,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091091560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:25,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:25,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:25,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433694127] [2021-06-05 04:45:25,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:25,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:25,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:25,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:25,924 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 04:45:26,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:26,111 INFO L93 Difference]: Finished difference Result 547 states and 1575 transitions. [2021-06-05 04:45:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:26,112 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 04:45:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:26,112 INFO L225 Difference]: With dead ends: 547 [2021-06-05 04:45:26,112 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 04:45:26,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 04:45:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 307. [2021-06-05 04:45:26,116 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 04:45:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 916 transitions. [2021-06-05 04:45:26,116 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 916 transitions. Word has length 20 [2021-06-05 04:45:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:26,116 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 916 transitions. [2021-06-05 04:45:26,116 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 04:45:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 916 transitions. [2021-06-05 04:45:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:26,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:26,117 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:26,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4628,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:26,317 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:26,317 INFO L82 PathProgramCache]: Analyzing trace with hash 932556719, now seen corresponding path program 523 times [2021-06-05 04:45:26,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:26,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378440826] [2021-06-05 04:45:26,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:26,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:26,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378440826] [2021-06-05 04:45:26,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378440826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:26,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977055393] [2021-06-05 04:45:26,400 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 04:45:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:26,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:26,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:26,619 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 04:45:26,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977055393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:26,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:26,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:26,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759517651] [2021-06-05 04:45:26,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:26,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:26,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:26,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:26,620 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 04:45:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:26,809 INFO L93 Difference]: Finished difference Result 572 states and 1609 transitions. [2021-06-05 04:45:26,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:26,809 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 04:45:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:26,810 INFO L225 Difference]: With dead ends: 572 [2021-06-05 04:45:26,810 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 04:45:26,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:26,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 04:45:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 311. [2021-06-05 04:45:26,813 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 04:45:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 930 transitions. [2021-06-05 04:45:26,814 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 930 transitions. Word has length 20 [2021-06-05 04:45:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:26,814 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 930 transitions. [2021-06-05 04:45:26,814 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 04:45:26,814 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 930 transitions. [2021-06-05 04:45:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:26,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:26,814 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:27,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4637 [2021-06-05 04:45:27,015 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:27,015 INFO L82 PathProgramCache]: Analyzing trace with hash -982867207, now seen corresponding path program 524 times [2021-06-05 04:45:27,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:27,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505660021] [2021-06-05 04:45:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:27,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:27,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505660021] [2021-06-05 04:45:27,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505660021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:27,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134125398] [2021-06-05 04:45:27,080 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 04:45:27,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:27,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:27,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:27,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:27,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134125398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:27,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:27,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:27,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951584799] [2021-06-05 04:45:27,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:27,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:27,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:27,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:27,325 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 04:45:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:27,577 INFO L93 Difference]: Finished difference Result 578 states and 1630 transitions. [2021-06-05 04:45:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:27,577 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 04:45:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:27,578 INFO L225 Difference]: With dead ends: 578 [2021-06-05 04:45:27,578 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 04:45:27,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 275.2ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 04:45:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 308. [2021-06-05 04:45:27,581 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 04:45:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 920 transitions. [2021-06-05 04:45:27,582 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 920 transitions. Word has length 20 [2021-06-05 04:45:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:27,582 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 920 transitions. [2021-06-05 04:45:27,582 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 04:45:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 920 transitions. [2021-06-05 04:45:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:27,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:27,582 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 04:45:27,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4647,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:27,782 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:27,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:27,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1200608439, now seen corresponding path program 525 times [2021-06-05 04:45:27,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:27,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231448241] [2021-06-05 04:45:27,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:27,845 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 04:45:27,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:27,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231448241] [2021-06-05 04:45:27,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231448241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:27,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621042516] [2021-06-05 04:45:27,846 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 04:45:27,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:27,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:27,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:28,082 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 04:45:28,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621042516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:28,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:28,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:28,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683699120] [2021-06-05 04:45:28,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:28,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:28,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:28,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:28,083 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 04:45:28,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:28,302 INFO L93 Difference]: Finished difference Result 508 states and 1475 transitions. [2021-06-05 04:45:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:28,302 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 04:45:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:28,303 INFO L225 Difference]: With dead ends: 508 [2021-06-05 04:45:28,303 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 04:45:28,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 04:45:28,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 309. [2021-06-05 04:45:28,306 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 04:45:28,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 922 transitions. [2021-06-05 04:45:28,306 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 922 transitions. Word has length 20 [2021-06-05 04:45:28,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:28,307 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 922 transitions. [2021-06-05 04:45:28,307 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 04:45:28,307 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 922 transitions. [2021-06-05 04:45:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:28,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:28,307 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:28,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4657 [2021-06-05 04:45:28,507 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:28,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:28,508 INFO L82 PathProgramCache]: Analyzing trace with hash 91733961, now seen corresponding path program 526 times [2021-06-05 04:45:28,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:28,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328952822] [2021-06-05 04:45:28,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:28,581 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 04:45:28,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:28,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328952822] [2021-06-05 04:45:28,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328952822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:28,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868913361] [2021-06-05 04:45:28,581 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 04:45:28,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:28,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:28,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:28,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:28,800 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 04:45:28,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868913361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:28,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:28,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:28,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421585290] [2021-06-05 04:45:28,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:28,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:28,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:28,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:28,801 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 04:45:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:29,011 INFO L93 Difference]: Finished difference Result 496 states and 1442 transitions. [2021-06-05 04:45:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:29,011 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 04:45:29,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:29,012 INFO L225 Difference]: With dead ends: 496 [2021-06-05 04:45:29,012 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 04:45:29,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 04:45:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 298. [2021-06-05 04:45:29,015 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 04:45:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 885 transitions. [2021-06-05 04:45:29,015 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 885 transitions. Word has length 20 [2021-06-05 04:45:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:29,016 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 885 transitions. [2021-06-05 04:45:29,016 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 04:45:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 885 transitions. [2021-06-05 04:45:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:29,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:29,016 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:29,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:29,216 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:29,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1804131075, now seen corresponding path program 527 times [2021-06-05 04:45:29,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:29,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369395759] [2021-06-05 04:45:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:29,279 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 04:45:29,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:29,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369395759] [2021-06-05 04:45:29,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369395759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:29,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026054797] [2021-06-05 04:45:29,279 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 04:45:29,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:29,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:29,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:29,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:29,496 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 04:45:29,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026054797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:29,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:29,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:29,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148754906] [2021-06-05 04:45:29,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:29,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:29,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:29,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:29,497 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 04:45:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:29,679 INFO L93 Difference]: Finished difference Result 451 states and 1320 transitions. [2021-06-05 04:45:29,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:29,680 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 04:45:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:29,680 INFO L225 Difference]: With dead ends: 451 [2021-06-05 04:45:29,680 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 04:45:29,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 04:45:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 295. [2021-06-05 04:45:29,683 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 04:45:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 873 transitions. [2021-06-05 04:45:29,684 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 873 transitions. Word has length 20 [2021-06-05 04:45:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:29,684 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 873 transitions. [2021-06-05 04:45:29,684 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 04:45:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 873 transitions. [2021-06-05 04:45:29,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:29,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:29,684 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 04:45:29,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4671,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:29,885 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:29,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:29,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1847638207, now seen corresponding path program 528 times [2021-06-05 04:45:29,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:29,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293109433] [2021-06-05 04:45:29,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:29,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:29,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293109433] [2021-06-05 04:45:29,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293109433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:29,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200173904] [2021-06-05 04:45:29,949 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 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 04:45:30,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:30,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:30,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:30,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200173904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:30,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:30,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:30,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872421269] [2021-06-05 04:45:30,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:30,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:30,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:30,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:30,174 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 04:45:30,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:30,360 INFO L93 Difference]: Finished difference Result 496 states and 1414 transitions. [2021-06-05 04:45:30,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:30,360 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 04:45:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:30,360 INFO L225 Difference]: With dead ends: 496 [2021-06-05 04:45:30,361 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 04:45:30,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 04:45:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 309. [2021-06-05 04:45:30,364 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 04:45:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 912 transitions. [2021-06-05 04:45:30,364 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 912 transitions. Word has length 20 [2021-06-05 04:45:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:30,364 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 912 transitions. [2021-06-05 04:45:30,364 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 04:45:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 912 transitions. [2021-06-05 04:45:30,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:30,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:30,365 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:30,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4677,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:30,565 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:30,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:30,565 INFO L82 PathProgramCache]: Analyzing trace with hash -67785719, now seen corresponding path program 529 times [2021-06-05 04:45:30,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:30,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371052093] [2021-06-05 04:45:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:30,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:30,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371052093] [2021-06-05 04:45:30,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371052093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:30,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264978975] [2021-06-05 04:45:30,625 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 04:45:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:30,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:30,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:30,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264978975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:30,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:30,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:30,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675806885] [2021-06-05 04:45:30,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:30,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:30,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:30,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:30,850 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 04:45:31,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:31,038 INFO L93 Difference]: Finished difference Result 502 states and 1435 transitions. [2021-06-05 04:45:31,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:31,038 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 04:45:31,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:31,039 INFO L225 Difference]: With dead ends: 502 [2021-06-05 04:45:31,039 INFO L226 Difference]: Without dead ends: 502 [2021-06-05 04:45:31,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-05 04:45:31,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 307. [2021-06-05 04:45:31,042 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 04:45:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 907 transitions. [2021-06-05 04:45:31,043 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 907 transitions. Word has length 20 [2021-06-05 04:45:31,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:31,043 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 907 transitions. [2021-06-05 04:45:31,043 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 04:45:31,043 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 907 transitions. [2021-06-05 04:45:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:31,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:31,043 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:31,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:31,243 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:31,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:31,244 INFO L82 PathProgramCache]: Analyzing trace with hash 972450079, now seen corresponding path program 530 times [2021-06-05 04:45:31,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:31,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531240456] [2021-06-05 04:45:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:31,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:31,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:31,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531240456] [2021-06-05 04:45:31,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531240456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:31,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129230126] [2021-06-05 04:45:31,304 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 04:45:31,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:31,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:31,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:31,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:31,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129230126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:31,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:31,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:31,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824319533] [2021-06-05 04:45:31,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:31,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:31,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:31,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:31,544 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 04:45:31,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:31,732 INFO L93 Difference]: Finished difference Result 471 states and 1370 transitions. [2021-06-05 04:45:31,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:31,733 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 04:45:31,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:31,733 INFO L225 Difference]: With dead ends: 471 [2021-06-05 04:45:31,733 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 04:45:31,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 04:45:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 294. [2021-06-05 04:45:31,736 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 04:45:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 04:45:31,737 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 04:45:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:31,737 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 04:45:31,737 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 04:45:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 04:45:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:31,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:31,737 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:31,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4701,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:31,937 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:31,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1722767751, now seen corresponding path program 531 times [2021-06-05 04:45:31,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:31,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579258795] [2021-06-05 04:45:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:31,988 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 04:45:31,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:31,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579258795] [2021-06-05 04:45:31,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579258795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:31,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202717866] [2021-06-05 04:45:31,989 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 04:45:32,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:45:32,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:32,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:32,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:32,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202717866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:32,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:32,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:32,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778765759] [2021-06-05 04:45:32,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:32,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:32,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:32,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:32,201 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 04:45:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:32,390 INFO L93 Difference]: Finished difference Result 443 states and 1286 transitions. [2021-06-05 04:45:32,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:32,390 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 04:45:32,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:32,391 INFO L225 Difference]: With dead ends: 443 [2021-06-05 04:45:32,391 INFO L226 Difference]: Without dead ends: 431 [2021-06-05 04:45:32,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:32,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-06-05 04:45:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 298. [2021-06-05 04:45:32,394 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 04:45:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 879 transitions. [2021-06-05 04:45:32,394 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 879 transitions. Word has length 20 [2021-06-05 04:45:32,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:32,394 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 879 transitions. [2021-06-05 04:45:32,394 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 04:45:32,394 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 879 transitions. [2021-06-05 04:45:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:32,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:32,395 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 04:45:32,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4706,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:32,595 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:32,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:32,596 INFO L82 PathProgramCache]: Analyzing trace with hash -971367313, now seen corresponding path program 532 times [2021-06-05 04:45:32,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:32,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325173328] [2021-06-05 04:45:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:32,651 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 04:45:32,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:32,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325173328] [2021-06-05 04:45:32,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325173328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:32,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137195805] [2021-06-05 04:45:32,651 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 04:45:32,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:32,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:32,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:32,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137195805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:32,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:32,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:32,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809027814] [2021-06-05 04:45:32,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:32,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:32,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:32,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:32,875 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 04:45:33,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:33,120 INFO L93 Difference]: Finished difference Result 468 states and 1338 transitions. [2021-06-05 04:45:33,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:33,120 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 04:45:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:33,121 INFO L225 Difference]: With dead ends: 468 [2021-06-05 04:45:33,121 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 04:45:33,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:33,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 04:45:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 308. [2021-06-05 04:45:33,124 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 04:45:33,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 906 transitions. [2021-06-05 04:45:33,125 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 906 transitions. Word has length 20 [2021-06-05 04:45:33,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:33,125 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 906 transitions. [2021-06-05 04:45:33,125 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 04:45:33,125 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 906 transitions. [2021-06-05 04:45:33,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:33,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:33,125 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 04:45:33,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4712 [2021-06-05 04:45:33,326 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:33,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:33,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1408176057, now seen corresponding path program 533 times [2021-06-05 04:45:33,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:33,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314803763] [2021-06-05 04:45:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:33,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:33,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314803763] [2021-06-05 04:45:33,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314803763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:33,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209177898] [2021-06-05 04:45:33,402 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 04:45:33,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:33,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:33,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:33,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:33,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209177898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:33,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:33,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:33,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970212025] [2021-06-05 04:45:33,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:33,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:33,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:33,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:33,626 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 04:45:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:33,771 INFO L93 Difference]: Finished difference Result 439 states and 1284 transitions. [2021-06-05 04:45:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:33,771 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 04:45:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:33,772 INFO L225 Difference]: With dead ends: 439 [2021-06-05 04:45:33,772 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 04:45:33,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 04:45:33,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 296. [2021-06-05 04:45:33,775 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 04:45:33,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2021-06-05 04:45:33,775 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 20 [2021-06-05 04:45:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:33,775 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2021-06-05 04:45:33,775 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 04:45:33,776 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2021-06-05 04:45:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:33,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:33,776 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 04:45:33,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4718 [2021-06-05 04:45:33,976 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:33,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1211171353, now seen corresponding path program 534 times [2021-06-05 04:45:33,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:33,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116232043] [2021-06-05 04:45:33,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:34,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:34,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116232043] [2021-06-05 04:45:34,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116232043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:34,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20808870] [2021-06-05 04:45:34,044 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 04:45:34,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:34,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:34,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:34,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:34,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20808870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:34,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:34,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:34,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348452105] [2021-06-05 04:45:34,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:34,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:34,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:34,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:34,246 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 04:45:34,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:34,407 INFO L93 Difference]: Finished difference Result 474 states and 1353 transitions. [2021-06-05 04:45:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:34,407 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 04:45:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:34,408 INFO L225 Difference]: With dead ends: 474 [2021-06-05 04:45:34,408 INFO L226 Difference]: Without dead ends: 468 [2021-06-05 04:45:34,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-06-05 04:45:34,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 310. [2021-06-05 04:45:34,411 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 04:45:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 913 transitions. [2021-06-05 04:45:34,411 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 913 transitions. Word has length 20 [2021-06-05 04:45:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:34,411 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 913 transitions. [2021-06-05 04:45:34,411 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 04:45:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 913 transitions. [2021-06-05 04:45:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:34,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:34,412 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 04:45:34,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4724,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:34,612 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:34,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:34,612 INFO L82 PathProgramCache]: Analyzing trace with hash -704252573, now seen corresponding path program 535 times [2021-06-05 04:45:34,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:34,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93130834] [2021-06-05 04:45:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:34,666 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 04:45:34,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:34,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93130834] [2021-06-05 04:45:34,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93130834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:34,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264554260] [2021-06-05 04:45:34,667 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 04:45:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:34,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:34,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:34,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264554260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:34,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:34,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:34,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905177274] [2021-06-05 04:45:34,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:34,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:34,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:34,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:34,874 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 04:45:35,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:35,070 INFO L93 Difference]: Finished difference Result 474 states and 1359 transitions. [2021-06-05 04:45:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:35,070 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 04:45:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:35,071 INFO L225 Difference]: With dead ends: 474 [2021-06-05 04:45:35,071 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 04:45:35,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 04:45:35,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 308. [2021-06-05 04:45:35,074 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 04:45:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 908 transitions. [2021-06-05 04:45:35,074 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 908 transitions. Word has length 20 [2021-06-05 04:45:35,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:35,074 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 908 transitions. [2021-06-05 04:45:35,074 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 04:45:35,074 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 908 transitions. [2021-06-05 04:45:35,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:35,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:35,075 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:35,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4729 [2021-06-05 04:45:35,275 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:35,276 INFO L82 PathProgramCache]: Analyzing trace with hash 335983225, now seen corresponding path program 536 times [2021-06-05 04:45:35,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:35,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242219765] [2021-06-05 04:45:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:35,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:35,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242219765] [2021-06-05 04:45:35,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242219765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:35,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808973911] [2021-06-05 04:45:35,336 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 04:45:35,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:35,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:35,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:35,576 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 04:45:35,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808973911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:35,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:35,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:35,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260985563] [2021-06-05 04:45:35,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:35,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:35,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:35,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:35,577 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 04:45:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:35,730 INFO L93 Difference]: Finished difference Result 449 states and 1309 transitions. [2021-06-05 04:45:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:35,731 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 04:45:35,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:35,731 INFO L225 Difference]: With dead ends: 449 [2021-06-05 04:45:35,731 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 04:45:35,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 04:45:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 293. [2021-06-05 04:45:35,734 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 04:45:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-06-05 04:45:35,735 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-06-05 04:45:35,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:35,735 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-06-05 04:45:35,735 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 04:45:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-06-05 04:45:35,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:35,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:35,735 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 04:45:35,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4735,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:35,936 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:35,936 INFO L82 PathProgramCache]: Analyzing trace with hash -645819531, now seen corresponding path program 537 times [2021-06-05 04:45:35,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:35,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865301369] [2021-06-05 04:45:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:36,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:36,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865301369] [2021-06-05 04:45:36,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865301369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:36,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072558350] [2021-06-05 04:45:36,001 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 04:45:36,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:36,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:36,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:36,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:36,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072558350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:36,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:36,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:36,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806769221] [2021-06-05 04:45:36,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:36,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:36,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:36,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:36,242 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 04:45:36,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:36,608 INFO L93 Difference]: Finished difference Result 662 states and 1855 transitions. [2021-06-05 04:45:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:36,609 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 04:45:36,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:36,609 INFO L225 Difference]: With dead ends: 662 [2021-06-05 04:45:36,609 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 04:45:36,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:45:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 04:45:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 305. [2021-06-05 04:45:36,613 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 04:45:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 919 transitions. [2021-06-05 04:45:36,614 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 919 transitions. Word has length 20 [2021-06-05 04:45:36,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:36,614 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 919 transitions. [2021-06-05 04:45:36,614 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 04:45:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 919 transitions. [2021-06-05 04:45:36,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:36,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:36,614 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:36,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4738,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:36,815 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:36,815 INFO L82 PathProgramCache]: Analyzing trace with hash -2139727253, now seen corresponding path program 538 times [2021-06-05 04:45:36,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:36,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962709325] [2021-06-05 04:45:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:36,884 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 04:45:36,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:36,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962709325] [2021-06-05 04:45:36,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962709325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:36,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723253195] [2021-06-05 04:45:36,884 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 04:45:36,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:36,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:36,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:36,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:37,160 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 04:45:37,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723253195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:37,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:37,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:37,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173480438] [2021-06-05 04:45:37,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:37,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:37,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:37,161 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 04:45:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:37,411 INFO L93 Difference]: Finished difference Result 616 states and 1753 transitions. [2021-06-05 04:45:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:37,411 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 04:45:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:37,412 INFO L225 Difference]: With dead ends: 616 [2021-06-05 04:45:37,412 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 04:45:37,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:37,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 04:45:37,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 308. [2021-06-05 04:45:37,415 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 04:45:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-06-05 04:45:37,416 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2021-06-05 04:45:37,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:37,416 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-06-05 04:45:37,416 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 04:45:37,416 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-06-05 04:45:37,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:37,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:37,416 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 04:45:37,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4747 [2021-06-05 04:45:37,617 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:37,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:37,617 INFO L82 PathProgramCache]: Analyzing trace with hash 105580907, now seen corresponding path program 539 times [2021-06-05 04:45:37,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:37,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117008216] [2021-06-05 04:45:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:37,700 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 04:45:37,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:37,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117008216] [2021-06-05 04:45:37,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117008216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:37,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644457629] [2021-06-05 04:45:37,700 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 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 04:45:37,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:37,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:37,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:37,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:38,028 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 04:45:38,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644457629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:38,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:38,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:38,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714971324] [2021-06-05 04:45:38,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:38,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:38,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:38,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:38,029 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 04:45:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:38,325 INFO L93 Difference]: Finished difference Result 668 states and 1895 transitions. [2021-06-05 04:45:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:38,326 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 04:45:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:38,326 INFO L225 Difference]: With dead ends: 668 [2021-06-05 04:45:38,326 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 04:45:38,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 04:45:38,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 311. [2021-06-05 04:45:38,330 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 04:45:38,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 936 transitions. [2021-06-05 04:45:38,330 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 936 transitions. Word has length 20 [2021-06-05 04:45:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:38,331 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 936 transitions. [2021-06-05 04:45:38,331 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 04:45:38,331 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 936 transitions. [2021-06-05 04:45:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:38,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:38,331 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 04:45:38,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4756,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:38,532 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1397923307, now seen corresponding path program 540 times [2021-06-05 04:45:38,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:38,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740905051] [2021-06-05 04:45:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:38,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:38,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740905051] [2021-06-05 04:45:38,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740905051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:38,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562077270] [2021-06-05 04:45:38,606 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 04:45:38,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:38,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:38,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:38,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:38,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562077270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:38,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:38,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:38,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560613191] [2021-06-05 04:45:38,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:38,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:38,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:38,847 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 04:45:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:39,115 INFO L93 Difference]: Finished difference Result 631 states and 1813 transitions. [2021-06-05 04:45:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:39,115 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 04:45:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:39,116 INFO L225 Difference]: With dead ends: 631 [2021-06-05 04:45:39,116 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 04:45:39,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 04:45:39,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 308. [2021-06-05 04:45:39,119 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 04:45:39,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 921 transitions. [2021-06-05 04:45:39,120 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 921 transitions. Word has length 20 [2021-06-05 04:45:39,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:39,120 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 921 transitions. [2021-06-05 04:45:39,120 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 04:45:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 921 transitions. [2021-06-05 04:45:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:39,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:39,120 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 04:45:39,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4767 [2021-06-05 04:45:39,321 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash 126317435, now seen corresponding path program 541 times [2021-06-05 04:45:39,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:39,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541380219] [2021-06-05 04:45:39,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:39,390 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 04:45:39,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:39,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541380219] [2021-06-05 04:45:39,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541380219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:39,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363658137] [2021-06-05 04:45:39,390 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 04:45:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:39,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:39,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:39,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363658137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:39,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:39,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:39,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698608482] [2021-06-05 04:45:39,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:39,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:39,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:39,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:39,619 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 04:45:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:39,861 INFO L93 Difference]: Finished difference Result 656 states and 1847 transitions. [2021-06-05 04:45:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:39,861 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 04:45:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:39,862 INFO L225 Difference]: With dead ends: 656 [2021-06-05 04:45:39,862 INFO L226 Difference]: Without dead ends: 650 [2021-06-05 04:45:39,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:39,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-06-05 04:45:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 312. [2021-06-05 04:45:39,866 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 04:45:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 935 transitions. [2021-06-05 04:45:39,866 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 935 transitions. Word has length 20 [2021-06-05 04:45:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:39,866 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 935 transitions. [2021-06-05 04:45:39,866 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 04:45:39,866 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 935 transitions. [2021-06-05 04:45:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:39,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:39,867 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 04:45:40,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4778,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:40,067 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:40,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:40,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1789106491, now seen corresponding path program 542 times [2021-06-05 04:45:40,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:40,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279437506] [2021-06-05 04:45:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:40,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:40,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279437506] [2021-06-05 04:45:40,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279437506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:40,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639738819] [2021-06-05 04:45:40,133 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 04:45:40,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:40,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:40,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:40,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:40,356 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 04:45:40,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639738819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:40,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:40,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:40,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109486292] [2021-06-05 04:45:40,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:40,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:40,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:40,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:40,357 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 04:45:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:40,685 INFO L93 Difference]: Finished difference Result 662 states and 1868 transitions. [2021-06-05 04:45:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:40,685 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 04:45:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:40,686 INFO L225 Difference]: With dead ends: 662 [2021-06-05 04:45:40,686 INFO L226 Difference]: Without dead ends: 662 [2021-06-05 04:45:40,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:45:40,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-06-05 04:45:40,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 309. [2021-06-05 04:45:40,689 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 04:45:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-06-05 04:45:40,690 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-06-05 04:45:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:40,690 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-06-05 04:45:40,690 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 04:45:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-06-05 04:45:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:40,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:40,690 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 04:45:40,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4789 [2021-06-05 04:45:40,891 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:40,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:40,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2006847723, now seen corresponding path program 543 times [2021-06-05 04:45:40,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:40,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367662988] [2021-06-05 04:45:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:40,958 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 04:45:40,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:40,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367662988] [2021-06-05 04:45:40,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367662988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:40,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151557734] [2021-06-05 04:45:40,958 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 04:45:41,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:41,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:41,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:41,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:41,176 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 04:45:41,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151557734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:41,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:41,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:41,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385173809] [2021-06-05 04:45:41,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:41,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:41,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:41,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:41,177 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 04:45:41,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:41,399 INFO L93 Difference]: Finished difference Result 613 states and 1782 transitions. [2021-06-05 04:45:41,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:41,400 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 04:45:41,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:41,400 INFO L225 Difference]: With dead ends: 613 [2021-06-05 04:45:41,401 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 04:45:41,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:41,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 04:45:41,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 315. [2021-06-05 04:45:41,404 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 04:45:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 952 transitions. [2021-06-05 04:45:41,405 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 952 transitions. Word has length 20 [2021-06-05 04:45:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:41,405 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 952 transitions. [2021-06-05 04:45:41,405 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 04:45:41,405 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 952 transitions. [2021-06-05 04:45:41,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:41,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:41,405 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 04:45:41,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4802,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:41,606 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:41,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:41,606 INFO L82 PathProgramCache]: Analyzing trace with hash -714505323, now seen corresponding path program 544 times [2021-06-05 04:45:41,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:41,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758023236] [2021-06-05 04:45:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:41,671 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 04:45:41,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:41,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758023236] [2021-06-05 04:45:41,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758023236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:41,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234483126] [2021-06-05 04:45:41,672 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 04:45:41,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:41,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:41,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:41,914 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 04:45:41,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234483126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:41,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:41,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:41,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312508594] [2021-06-05 04:45:41,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:41,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:41,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:41,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:41,915 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 04:45:42,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:42,178 INFO L93 Difference]: Finished difference Result 601 states and 1749 transitions. [2021-06-05 04:45:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:42,178 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 04:45:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:42,179 INFO L225 Difference]: With dead ends: 601 [2021-06-05 04:45:42,179 INFO L226 Difference]: Without dead ends: 601 [2021-06-05 04:45:42,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-05 04:45:42,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 312. [2021-06-05 04:45:42,183 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 04:45:42,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 937 transitions. [2021-06-05 04:45:42,183 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 937 transitions. Word has length 20 [2021-06-05 04:45:42,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:42,183 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 937 transitions. [2021-06-05 04:45:42,183 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 04:45:42,183 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 937 transitions. [2021-06-05 04:45:42,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:42,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:42,184 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:42,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 547 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4809 [2021-06-05 04:45:42,384 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:42,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:42,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1684596937, now seen corresponding path program 545 times [2021-06-05 04:45:42,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:42,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051332183] [2021-06-05 04:45:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:42,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:42,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051332183] [2021-06-05 04:45:42,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051332183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:42,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253060132] [2021-06-05 04:45:42,457 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 04:45:42,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:42,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:42,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:42,726 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 04:45:42,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253060132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:42,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:42,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:42,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451749738] [2021-06-05 04:45:42,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:42,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:42,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:42,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:42,727 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 04:45:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:42,949 INFO L93 Difference]: Finished difference Result 556 states and 1627 transitions. [2021-06-05 04:45:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:42,950 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 04:45:42,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:42,950 INFO L225 Difference]: With dead ends: 556 [2021-06-05 04:45:42,950 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 04:45:42,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 04:45:42,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 309. [2021-06-05 04:45:42,954 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 04:45:42,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 925 transitions. [2021-06-05 04:45:42,954 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 925 transitions. Word has length 20 [2021-06-05 04:45:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:42,954 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 925 transitions. [2021-06-05 04:45:42,954 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 04:45:42,954 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 925 transitions. [2021-06-05 04:45:42,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:42,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:42,955 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:43,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4819 [2021-06-05 04:45:43,155 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:43,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:43,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1041398923, now seen corresponding path program 546 times [2021-06-05 04:45:43,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:43,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301059922] [2021-06-05 04:45:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:43,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:43,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301059922] [2021-06-05 04:45:43,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301059922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:43,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342584170] [2021-06-05 04:45:43,216 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 04:45:43,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:43,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:43,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:43,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:43,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342584170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:43,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:43,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:43,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899576012] [2021-06-05 04:45:43,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:43,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:43,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:43,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:43,511 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 04:45:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:43,756 INFO L93 Difference]: Finished difference Result 595 states and 1706 transitions. [2021-06-05 04:45:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:43,756 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 04:45:43,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:43,757 INFO L225 Difference]: With dead ends: 595 [2021-06-05 04:45:43,757 INFO L226 Difference]: Without dead ends: 589 [2021-06-05 04:45:43,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-06-05 04:45:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 317. [2021-06-05 04:45:43,761 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 04:45:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 951 transitions. [2021-06-05 04:45:43,761 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 951 transitions. Word has length 20 [2021-06-05 04:45:43,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:43,761 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 951 transitions. [2021-06-05 04:45:43,761 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 04:45:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 951 transitions. [2021-06-05 04:45:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:43,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:43,762 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:43,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4825,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:43,962 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:43,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:43,962 INFO L82 PathProgramCache]: Analyzing trace with hash -874025003, now seen corresponding path program 547 times [2021-06-05 04:45:43,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:43,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794158129] [2021-06-05 04:45:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:44,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:44,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794158129] [2021-06-05 04:45:44,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794158129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:44,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213368519] [2021-06-05 04:45:44,024 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 04:45:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:44,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:44,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213368519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:44,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:44,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:44,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578510607] [2021-06-05 04:45:44,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:44,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:44,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:44,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:44,257 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 04:45:44,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:44,528 INFO L93 Difference]: Finished difference Result 601 states and 1727 transitions. [2021-06-05 04:45:44,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:44,529 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 04:45:44,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:44,529 INFO L225 Difference]: With dead ends: 601 [2021-06-05 04:45:44,529 INFO L226 Difference]: Without dead ends: 601 [2021-06-05 04:45:44,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 278.3ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:45:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-05 04:45:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 313. [2021-06-05 04:45:44,533 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 04:45:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2021-06-05 04:45:44,533 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2021-06-05 04:45:44,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:44,534 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2021-06-05 04:45:44,534 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 04:45:44,534 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2021-06-05 04:45:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:44,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:44,534 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 04:45:44,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4834 [2021-06-05 04:45:44,750 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:44,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:44,750 INFO L82 PathProgramCache]: Analyzing trace with hash 166210795, now seen corresponding path program 548 times [2021-06-05 04:45:44,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:44,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25448271] [2021-06-05 04:45:44,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:44,811 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 04:45:44,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:44,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25448271] [2021-06-05 04:45:44,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25448271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:44,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085854033] [2021-06-05 04:45:44,811 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 04:45:44,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:44,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:44,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:44,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:45,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085854033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:45,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:45,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:45,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892811198] [2021-06-05 04:45:45,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:45,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:45,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:45,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:45,026 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 04:45:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:45,265 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2021-06-05 04:45:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:45,266 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 04:45:45,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:45,266 INFO L225 Difference]: With dead ends: 576 [2021-06-05 04:45:45,266 INFO L226 Difference]: Without dead ends: 576 [2021-06-05 04:45:45,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-06-05 04:45:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 310. [2021-06-05 04:45:45,270 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 04:45:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 928 transitions. [2021-06-05 04:45:45,270 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 928 transitions. Word has length 20 [2021-06-05 04:45:45,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:45,271 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 928 transitions. [2021-06-05 04:45:45,271 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 04:45:45,271 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 928 transitions. [2021-06-05 04:45:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:45,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:45,271 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 04:45:45,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4842,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:45,471 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:45,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:45,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1015185865, now seen corresponding path program 549 times [2021-06-05 04:45:45,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:45,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980353649] [2021-06-05 04:45:45,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:45,533 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 04:45:45,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:45,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980353649] [2021-06-05 04:45:45,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980353649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:45,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621023681] [2021-06-05 04:45:45,534 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 04:45:45,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:45,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:45,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:45,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:45,751 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 04:45:45,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621023681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:45,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:45,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:45,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653465441] [2021-06-05 04:45:45,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:45,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:45,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:45,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:45,752 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 04:45:45,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:45,962 INFO L93 Difference]: Finished difference Result 600 states and 1738 transitions. [2021-06-05 04:45:45,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:45,962 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 04:45:45,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:45,963 INFO L225 Difference]: With dead ends: 600 [2021-06-05 04:45:45,963 INFO L226 Difference]: Without dead ends: 600 [2021-06-05 04:45:45,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-06-05 04:45:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 313. [2021-06-05 04:45:45,966 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 04:45:45,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 937 transitions. [2021-06-05 04:45:45,967 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 937 transitions. Word has length 20 [2021-06-05 04:45:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:45,967 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 937 transitions. [2021-06-05 04:45:45,967 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 04:45:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 937 transitions. [2021-06-05 04:45:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:45,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:45,967 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 04:45:46,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4847 [2021-06-05 04:45:46,168 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:46,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:46,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1987439031, now seen corresponding path program 550 times [2021-06-05 04:45:46,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:46,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899113484] [2021-06-05 04:45:46,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:46,232 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 04:45:46,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:46,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899113484] [2021-06-05 04:45:46,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899113484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:46,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356135270] [2021-06-05 04:45:46,233 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 04:45:46,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:46,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:46,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:46,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:46,464 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 04:45:46,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356135270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:46,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:46,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:46,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266988598] [2021-06-05 04:45:46,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:46,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:46,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:46,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:46,464 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 04:45:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:46,683 INFO L93 Difference]: Finished difference Result 602 states and 1742 transitions. [2021-06-05 04:45:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:46,683 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 04:45:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:46,684 INFO L225 Difference]: With dead ends: 602 [2021-06-05 04:45:46,684 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 04:45:46,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 04:45:46,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 310. [2021-06-05 04:45:46,687 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 04:45:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 922 transitions. [2021-06-05 04:45:46,688 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 922 transitions. Word has length 20 [2021-06-05 04:45:46,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:46,688 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 922 transitions. [2021-06-05 04:45:46,688 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 04:45:46,688 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 922 transitions. [2021-06-05 04:45:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:46,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:46,688 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 04:45:46,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4855,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:46,889 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:46,889 INFO L82 PathProgramCache]: Analyzing trace with hash 411663229, now seen corresponding path program 551 times [2021-06-05 04:45:46,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:46,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558555000] [2021-06-05 04:45:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:46,948 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 04:45:46,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:46,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558555000] [2021-06-05 04:45:46,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558555000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:46,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701190637] [2021-06-05 04:45:46,948 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 04:45:47,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:47,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:47,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:47,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:47,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701190637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:47,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:47,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:45:47,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29966413] [2021-06-05 04:45:47,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:45:47,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:47,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:45:47,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:45:47,162 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 04:45:47,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:47,403 INFO L93 Difference]: Finished difference Result 547 states and 1591 transitions. [2021-06-05 04:45:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:47,403 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 04:45:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:47,404 INFO L225 Difference]: With dead ends: 547 [2021-06-05 04:45:47,404 INFO L226 Difference]: Without dead ends: 547 [2021-06-05 04:45:47,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:47,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-05 04:45:47,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 297. [2021-06-05 04:45:47,407 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 04:45:47,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 881 transitions. [2021-06-05 04:45:47,408 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 881 transitions. Word has length 20 [2021-06-05 04:45:47,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:47,408 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 881 transitions. [2021-06-05 04:45:47,408 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 04:45:47,408 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 881 transitions. [2021-06-05 04:45:47,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:47,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:47,408 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:47,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4862,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:47,609 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:47,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:47,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1672499755, now seen corresponding path program 552 times [2021-06-05 04:45:47,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:47,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564812627] [2021-06-05 04:45:47,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:47,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:47,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564812627] [2021-06-05 04:45:47,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564812627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:47,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979986960] [2021-06-05 04:45:47,663 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 04:45:47,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:47,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:47,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:47,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:47,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979986960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:47,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:47,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:47,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803184451] [2021-06-05 04:45:47,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:47,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:47,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:47,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:47,862 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 04:45:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:48,094 INFO L93 Difference]: Finished difference Result 570 states and 1633 transitions. [2021-06-05 04:45:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:48,094 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 04:45:48,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:48,095 INFO L225 Difference]: With dead ends: 570 [2021-06-05 04:45:48,095 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 04:45:48,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 04:45:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 294. [2021-06-05 04:45:48,098 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 04:45:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 869 transitions. [2021-06-05 04:45:48,099 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 869 transitions. Word has length 20 [2021-06-05 04:45:48,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:48,099 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 869 transitions. [2021-06-05 04:45:48,099 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 04:45:48,099 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 869 transitions. [2021-06-05 04:45:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:48,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:48,099 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 04:45:48,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4867,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:48,299 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:48,300 INFO L82 PathProgramCache]: Analyzing trace with hash -868001639, now seen corresponding path program 553 times [2021-06-05 04:45:48,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:48,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291953762] [2021-06-05 04:45:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:48,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:48,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291953762] [2021-06-05 04:45:48,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291953762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:48,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536154320] [2021-06-05 04:45:48,354 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 04:45:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:48,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:48,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:48,583 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 04:45:48,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536154320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:48,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:48,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:48,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048768835] [2021-06-05 04:45:48,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:48,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:48,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:48,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:48,584 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 04:45:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:48,836 INFO L93 Difference]: Finished difference Result 635 states and 1777 transitions. [2021-06-05 04:45:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:48,837 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 04:45:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:48,837 INFO L225 Difference]: With dead ends: 635 [2021-06-05 04:45:48,837 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 04:45:48,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 04:45:48,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 312. [2021-06-05 04:45:48,841 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 04:45:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 920 transitions. [2021-06-05 04:45:48,842 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 920 transitions. Word has length 20 [2021-06-05 04:45:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:48,842 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 920 transitions. [2021-06-05 04:45:48,842 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 04:45:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 920 transitions. [2021-06-05 04:45:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:48,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:48,842 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:49,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4872,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:49,042 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:49,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1511541731, now seen corresponding path program 554 times [2021-06-05 04:45:49,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:49,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189591349] [2021-06-05 04:45:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:49,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:49,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189591349] [2021-06-05 04:45:49,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189591349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:49,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297138622] [2021-06-05 04:45:49,101 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 04:45:49,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:49,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:49,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:49,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:49,306 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 04:45:49,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297138622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:49,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:49,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:49,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727326475] [2021-06-05 04:45:49,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:49,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:49,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:49,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:49,307 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 04:45:49,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:49,617 INFO L93 Difference]: Finished difference Result 641 states and 1798 transitions. [2021-06-05 04:45:49,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:49,617 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 04:45:49,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:49,618 INFO L225 Difference]: With dead ends: 641 [2021-06-05 04:45:49,618 INFO L226 Difference]: Without dead ends: 641 [2021-06-05 04:45:49,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:49,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-06-05 04:45:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 310. [2021-06-05 04:45:49,621 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 04:45:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 915 transitions. [2021-06-05 04:45:49,622 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 915 transitions. Word has length 20 [2021-06-05 04:45:49,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:49,622 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 915 transitions. [2021-06-05 04:45:49,622 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 04:45:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 915 transitions. [2021-06-05 04:45:49,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:49,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:49,622 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 04:45:49,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4880,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:49,822 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:49,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:49,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1743189767, now seen corresponding path program 555 times [2021-06-05 04:45:49,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:49,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550572972] [2021-06-05 04:45:49,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:49,879 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 04:45:49,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:49,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550572972] [2021-06-05 04:45:49,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550572972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:49,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908885067] [2021-06-05 04:45:49,879 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 04:45:49,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:49,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:49,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:49,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:50,090 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 04:45:50,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908885067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:50,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:50,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:45:50,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935613507] [2021-06-05 04:45:50,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:45:50,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:50,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:45:50,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:45:50,090 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 04:45:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:50,327 INFO L93 Difference]: Finished difference Result 624 states and 1770 transitions. [2021-06-05 04:45:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:50,327 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 04:45:50,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:50,328 INFO L225 Difference]: With dead ends: 624 [2021-06-05 04:45:50,328 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 04:45:50,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:50,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 04:45:50,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 308. [2021-06-05 04:45:50,332 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 04:45:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 910 transitions. [2021-06-05 04:45:50,332 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 910 transitions. Word has length 20 [2021-06-05 04:45:50,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:50,332 INFO L482 AbstractCegarLoop]: Abstraction has 308 states and 910 transitions. [2021-06-05 04:45:50,332 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 04:45:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 910 transitions. [2021-06-05 04:45:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:50,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:50,332 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:50,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:50,533 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:50,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:50,533 INFO L82 PathProgramCache]: Analyzing trace with hash 16863173, now seen corresponding path program 556 times [2021-06-05 04:45:50,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:50,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737468648] [2021-06-05 04:45:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:50,586 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 04:45:50,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:50,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737468648] [2021-06-05 04:45:50,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737468648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:50,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591567568] [2021-06-05 04:45:50,586 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 04:45:50,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:50,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:50,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:50,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:50,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591567568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:50,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:50,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:50,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979379712] [2021-06-05 04:45:50,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:50,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:50,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:50,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:50,787 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 04:45:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:51,006 INFO L93 Difference]: Finished difference Result 649 states and 1824 transitions. [2021-06-05 04:45:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:51,006 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 04:45:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:51,007 INFO L225 Difference]: With dead ends: 649 [2021-06-05 04:45:51,007 INFO L226 Difference]: Without dead ends: 649 [2021-06-05 04:45:51,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-05 04:45:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 293. [2021-06-05 04:45:51,010 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 04:45:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 865 transitions. [2021-06-05 04:45:51,011 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 865 transitions. Word has length 20 [2021-06-05 04:45:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:51,011 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 865 transitions. [2021-06-05 04:45:51,011 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 04:45:51,011 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 865 transitions. [2021-06-05 04:45:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:51,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:51,011 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:51,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4894,559 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:51,212 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:51,212 INFO L82 PathProgramCache]: Analyzing trace with hash -784643029, now seen corresponding path program 557 times [2021-06-05 04:45:51,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:51,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411838869] [2021-06-05 04:45:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:51,263 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 04:45:51,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:51,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411838869] [2021-06-05 04:45:51,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411838869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:51,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440736194] [2021-06-05 04:45:51,263 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 04:45:51,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:51,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:51,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:51,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:51,465 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 04:45:51,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440736194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:51,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:51,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:51,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057281422] [2021-06-05 04:45:51,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:51,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:51,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:51,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:51,466 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 04:45:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:51,653 INFO L93 Difference]: Finished difference Result 446 states and 1280 transitions. [2021-06-05 04:45:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:51,653 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 04:45:51,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:51,653 INFO L225 Difference]: With dead ends: 446 [2021-06-05 04:45:51,654 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 04:45:51,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 04:45:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 299. [2021-06-05 04:45:51,657 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 04:45:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 880 transitions. [2021-06-05 04:45:51,657 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 880 transitions. Word has length 20 [2021-06-05 04:45:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:51,657 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 880 transitions. [2021-06-05 04:45:51,657 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 04:45:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 880 transitions. [2021-06-05 04:45:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:51,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:51,658 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 04:45:51,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4899,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:51,873 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:51,873 INFO L82 PathProgramCache]: Analyzing trace with hash -33242591, now seen corresponding path program 558 times [2021-06-05 04:45:51,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:51,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895688889] [2021-06-05 04:45:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:51,920 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 04:45:51,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:51,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895688889] [2021-06-05 04:45:51,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895688889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:51,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684847085] [2021-06-05 04:45:51,920 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 04:45:52,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:45:52,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:52,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:52,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:52,117 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 04:45:52,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684847085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:52,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:52,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:52,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354680760] [2021-06-05 04:45:52,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:52,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:52,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:52,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:52,118 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 04:45:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:52,350 INFO L93 Difference]: Finished difference Result 471 states and 1332 transitions. [2021-06-05 04:45:52,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:52,350 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 04:45:52,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:52,351 INFO L225 Difference]: With dead ends: 471 [2021-06-05 04:45:52,351 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 04:45:52,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:45:52,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 04:45:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 309. [2021-06-05 04:45:52,354 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 04:45:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 907 transitions. [2021-06-05 04:45:52,354 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 907 transitions. Word has length 20 [2021-06-05 04:45:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:52,355 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 907 transitions. [2021-06-05 04:45:52,355 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 04:45:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 907 transitions. [2021-06-05 04:45:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:52,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:52,355 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:52,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4907 [2021-06-05 04:45:52,555 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:52,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1948666517, now seen corresponding path program 559 times [2021-06-05 04:45:52,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:52,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255960537] [2021-06-05 04:45:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:52,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:52,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255960537] [2021-06-05 04:45:52,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255960537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:52,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836162352] [2021-06-05 04:45:52,606 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 04:45:52,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:52,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:52,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:52,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836162352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:52,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:52,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:52,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497396915] [2021-06-05 04:45:52,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:52,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:52,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:52,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:52,806 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 04:45:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:52,988 INFO L93 Difference]: Finished difference Result 442 states and 1278 transitions. [2021-06-05 04:45:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:52,989 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 04:45:52,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:52,989 INFO L225 Difference]: With dead ends: 442 [2021-06-05 04:45:52,989 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 04:45:52,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 04:45:52,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 297. [2021-06-05 04:45:52,992 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 04:45:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 875 transitions. [2021-06-05 04:45:52,993 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 875 transitions. Word has length 20 [2021-06-05 04:45:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:52,993 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 875 transitions. [2021-06-05 04:45:52,993 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 04:45:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 875 transitions. [2021-06-05 04:45:52,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:52,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:52,993 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 04:45:53,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4912 [2021-06-05 04:45:53,193 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:53,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:53,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2145671221, now seen corresponding path program 560 times [2021-06-05 04:45:53,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:53,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360267622] [2021-06-05 04:45:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:53,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:53,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360267622] [2021-06-05 04:45:53,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360267622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:53,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194482748] [2021-06-05 04:45:53,241 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 04:45:53,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:53,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:53,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:53,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:53,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194482748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:53,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:53,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:53,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940797528] [2021-06-05 04:45:53,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:53,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:53,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:53,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:53,429 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 04:45:53,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:53,600 INFO L93 Difference]: Finished difference Result 477 states and 1347 transitions. [2021-06-05 04:45:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:53,601 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 04:45:53,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:53,601 INFO L225 Difference]: With dead ends: 477 [2021-06-05 04:45:53,601 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 04:45:53,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 04:45:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 311. [2021-06-05 04:45:53,604 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 04:45:53,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 914 transitions. [2021-06-05 04:45:53,605 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 914 transitions. Word has length 20 [2021-06-05 04:45:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:53,605 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 914 transitions. [2021-06-05 04:45:53,605 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 04:45:53,605 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 914 transitions. [2021-06-05 04:45:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:53,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:53,605 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:53,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4918 [2021-06-05 04:45:53,806 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:53,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:53,806 INFO L82 PathProgramCache]: Analyzing trace with hash 233872149, now seen corresponding path program 561 times [2021-06-05 04:45:53,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:53,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978689141] [2021-06-05 04:45:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:53,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:53,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978689141] [2021-06-05 04:45:53,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978689141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:53,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24313245] [2021-06-05 04:45:53,855 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 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 04:45:53,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:45:53,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:53,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:53,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:54,056 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 04:45:54,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24313245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:54,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:54,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:54,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289690079] [2021-06-05 04:45:54,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:54,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:54,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:54,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:54,057 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 04:45:54,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:54,229 INFO L93 Difference]: Finished difference Result 477 states and 1353 transitions. [2021-06-05 04:45:54,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:54,229 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 04:45:54,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:54,230 INFO L225 Difference]: With dead ends: 477 [2021-06-05 04:45:54,230 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 04:45:54,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:54,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 04:45:54,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 309. [2021-06-05 04:45:54,233 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 04:45:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 909 transitions. [2021-06-05 04:45:54,234 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 909 transitions. Word has length 20 [2021-06-05 04:45:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:54,234 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 909 transitions. [2021-06-05 04:45:54,234 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 04:45:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 909 transitions. [2021-06-05 04:45:54,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:54,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:54,234 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:54,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4923 [2021-06-05 04:45:54,435 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:54,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1274107947, now seen corresponding path program 562 times [2021-06-05 04:45:54,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:54,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592723683] [2021-06-05 04:45:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:54,484 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 04:45:54,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:54,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592723683] [2021-06-05 04:45:54,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592723683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:54,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923941645] [2021-06-05 04:45:54,485 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 04:45:54,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:54,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:54,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:54,668 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 04:45:54,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923941645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:54,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:54,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:54,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167013758] [2021-06-05 04:45:54,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:54,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:54,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:54,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:54,668 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 04:45:54,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:54,826 INFO L93 Difference]: Finished difference Result 452 states and 1303 transitions. [2021-06-05 04:45:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:54,826 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 04:45:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:54,827 INFO L225 Difference]: With dead ends: 452 [2021-06-05 04:45:54,827 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 04:45:54,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:54,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 04:45:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 295. [2021-06-05 04:45:54,830 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 04:45:54,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 870 transitions. [2021-06-05 04:45:54,830 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 870 transitions. Word has length 20 [2021-06-05 04:45:54,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:54,830 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 870 transitions. [2021-06-05 04:45:54,830 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 04:45:54,831 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 870 transitions. [2021-06-05 04:45:54,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:54,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:54,831 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 04:45:55,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4927,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:55,031 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:55,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:55,031 INFO L82 PathProgramCache]: Analyzing trace with hash 876362367, now seen corresponding path program 563 times [2021-06-05 04:45:55,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:55,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390968842] [2021-06-05 04:45:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:55,081 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 04:45:55,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:55,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390968842] [2021-06-05 04:45:55,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390968842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:55,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789709672] [2021-06-05 04:45:55,081 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 04:45:55,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:45:55,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:55,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:55,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:55,274 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 04:45:55,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789709672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:55,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:55,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:55,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648331629] [2021-06-05 04:45:55,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:55,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:55,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:55,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:55,275 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 04:45:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:55,452 INFO L93 Difference]: Finished difference Result 536 states and 1488 transitions. [2021-06-05 04:45:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:55,452 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 04:45:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:55,453 INFO L225 Difference]: With dead ends: 536 [2021-06-05 04:45:55,453 INFO L226 Difference]: Without dead ends: 530 [2021-06-05 04:45:55,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-05 04:45:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 313. [2021-06-05 04:45:55,456 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 04:45:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 921 transitions. [2021-06-05 04:45:55,457 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 921 transitions. Word has length 20 [2021-06-05 04:45:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:55,457 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 921 transitions. [2021-06-05 04:45:55,457 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 04:45:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 921 transitions. [2021-06-05 04:45:55,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:55,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:55,457 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 04:45:55,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4929 [2021-06-05 04:45:55,658 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:55,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1039061559, now seen corresponding path program 564 times [2021-06-05 04:45:55,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:55,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39275409] [2021-06-05 04:45:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:55,708 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 04:45:55,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:55,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39275409] [2021-06-05 04:45:55,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39275409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:55,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301438718] [2021-06-05 04:45:55,708 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 04:45:55,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:55,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:55,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:55,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:55,922 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 04:45:55,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301438718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:55,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:55,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:55,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966614433] [2021-06-05 04:45:55,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:55,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:55,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:55,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:55,923 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 04:45:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:56,151 INFO L93 Difference]: Finished difference Result 536 states and 1494 transitions. [2021-06-05 04:45:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:45:56,152 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 04:45:56,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:56,152 INFO L225 Difference]: With dead ends: 536 [2021-06-05 04:45:56,152 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 04:45:56,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:56,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 04:45:56,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 311. [2021-06-05 04:45:56,156 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 04:45:56,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 916 transitions. [2021-06-05 04:45:56,156 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 916 transitions. Word has length 20 [2021-06-05 04:45:56,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:56,156 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 916 transitions. [2021-06-05 04:45:56,156 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 04:45:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 916 transitions. [2021-06-05 04:45:56,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:56,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:56,157 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 04:45:56,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4934,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:56,357 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:56,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:56,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1174239, now seen corresponding path program 565 times [2021-06-05 04:45:56,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:56,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808600944] [2021-06-05 04:45:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:56,407 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 04:45:56,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:56,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808600944] [2021-06-05 04:45:56,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808600944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:56,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485671779] [2021-06-05 04:45:56,407 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 04:45:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:56,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:56,587 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 04:45:56,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485671779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:56,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:56,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:56,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669584339] [2021-06-05 04:45:56,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:56,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:56,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:56,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:56,587 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 04:45:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:56,750 INFO L93 Difference]: Finished difference Result 525 states and 1481 transitions. [2021-06-05 04:45:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:56,751 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 04:45:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:56,751 INFO L225 Difference]: With dead ends: 525 [2021-06-05 04:45:56,751 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 04:45:56,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:56,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 04:45:56,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 309. [2021-06-05 04:45:56,755 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 04:45:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 911 transitions. [2021-06-05 04:45:56,755 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 911 transitions. Word has length 20 [2021-06-05 04:45:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:56,755 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 911 transitions. [2021-06-05 04:45:56,755 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 04:45:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 911 transitions. [2021-06-05 04:45:56,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:56,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:56,756 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:56,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4939 [2021-06-05 04:45:56,956 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:56,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1761227179, now seen corresponding path program 566 times [2021-06-05 04:45:56,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:56,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371348150] [2021-06-05 04:45:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:57,003 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 04:45:57,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:57,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371348150] [2021-06-05 04:45:57,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371348150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:57,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343675174] [2021-06-05 04:45:57,003 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 04:45:57,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:57,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:57,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:57,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:57,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343675174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:57,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:57,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:45:57,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328784562] [2021-06-05 04:45:57,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:45:57,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:57,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:45:57,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:45:57,171 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 04:45:57,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:57,324 INFO L93 Difference]: Finished difference Result 515 states and 1454 transitions. [2021-06-05 04:45:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:57,324 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 04:45:57,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:57,325 INFO L225 Difference]: With dead ends: 515 [2021-06-05 04:45:57,325 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 04:45:57,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:45:57,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 04:45:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 292. [2021-06-05 04:45:57,328 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 04:45:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 861 transitions. [2021-06-05 04:45:57,328 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 861 transitions. Word has length 20 [2021-06-05 04:45:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:57,328 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 861 transitions. [2021-06-05 04:45:57,328 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 04:45:57,328 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 861 transitions. [2021-06-05 04:45:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:57,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:57,329 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:57,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4942 [2021-06-05 04:45:57,529 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1171432537, now seen corresponding path program 567 times [2021-06-05 04:45:57,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:57,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223603851] [2021-06-05 04:45:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:57,570 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 04:45:57,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:57,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223603851] [2021-06-05 04:45:57,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223603851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:57,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426483480] [2021-06-05 04:45:57,570 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 04:45:57,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:45:57,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:57,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:57,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:57,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426483480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:57,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:57,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:45:57,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333705596] [2021-06-05 04:45:57,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:45:57,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:45:57,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:45:57,745 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 04:45:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:57,967 INFO L93 Difference]: Finished difference Result 491 states and 1372 transitions. [2021-06-05 04:45:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:57,968 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 04:45:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:57,968 INFO L225 Difference]: With dead ends: 491 [2021-06-05 04:45:57,968 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 04:45:57,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:45:57,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 04:45:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 298. [2021-06-05 04:45:57,971 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 04:45:57,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-06-05 04:45:57,972 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-06-05 04:45:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:57,972 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-06-05 04:45:57,972 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 04:45:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-06-05 04:45:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:57,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:57,972 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:58,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4945,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:45:58,173 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:58,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:58,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1111178657, now seen corresponding path program 568 times [2021-06-05 04:45:58,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:58,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465151966] [2021-06-05 04:45:58,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:45:58,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:58,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465151966] [2021-06-05 04:45:58,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465151966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:58,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935178789] [2021-06-05 04:45:58,217 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 04:45:58,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:45:58,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:58,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:58,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:58,429 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 04:45:58,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935178789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:58,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:58,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:58,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430268813] [2021-06-05 04:45:58,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:58,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:58,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:58,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:58,429 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 04:45:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:58,702 INFO L93 Difference]: Finished difference Result 487 states and 1364 transitions. [2021-06-05 04:45:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:45:58,703 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 04:45:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:58,703 INFO L225 Difference]: With dead ends: 487 [2021-06-05 04:45:58,703 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 04:45:58,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:45:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 04:45:58,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 300. [2021-06-05 04:45:58,706 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 04:45:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-06-05 04:45:58,707 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-06-05 04:45:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:58,707 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-06-05 04:45:58,707 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 04:45:58,707 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-06-05 04:45:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:58,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:58,707 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 04:45:58,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4951 [2021-06-05 04:45:58,908 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:58,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:58,908 INFO L82 PathProgramCache]: Analyzing trace with hash -359778219, now seen corresponding path program 569 times [2021-06-05 04:45:58,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:58,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538026382] [2021-06-05 04:45:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:58,952 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 04:45:58,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:58,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538026382] [2021-06-05 04:45:58,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538026382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:58,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238292490] [2021-06-05 04:45:58,952 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 04:45:59,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:45:59,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:59,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:59,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:59,157 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 04:45:59,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238292490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:59,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:59,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:59,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691551821] [2021-06-05 04:45:59,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:59,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:59,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:59,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:59,157 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 04:45:59,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:45:59,548 INFO L93 Difference]: Finished difference Result 512 states and 1416 transitions. [2021-06-05 04:45:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:45:59,548 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 04:45:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:45:59,549 INFO L225 Difference]: With dead ends: 512 [2021-06-05 04:45:59,549 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 04:45:59,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:45:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 04:45:59,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 310. [2021-06-05 04:45:59,552 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 04:45:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-06-05 04:45:59,553 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-06-05 04:45:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:45:59,553 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-06-05 04:45:59,553 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 04:45:59,553 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-06-05 04:45:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:45:59,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:45:59,553 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:45:59,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4956 [2021-06-05 04:45:59,754 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:45:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:45:59,754 INFO L82 PathProgramCache]: Analyzing trace with hash 2019765151, now seen corresponding path program 570 times [2021-06-05 04:45:59,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:45:59,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781592868] [2021-06-05 04:45:59,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:45:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:45:59,800 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 04:45:59,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:45:59,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781592868] [2021-06-05 04:45:59,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781592868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:59,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841740644] [2021-06-05 04:45:59,800 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 04:45:59,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:45:59,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:45:59,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:45:59,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:45:59,999 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 04:45:59,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841740644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:45:59,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:45:59,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:45:59,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717569779] [2021-06-05 04:45:59,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:45:59,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:45:59,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:45:59,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:45:59,999 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 04:46:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:00,280 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2021-06-05 04:46:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:00,280 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 04:46:00,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:00,281 INFO L225 Difference]: With dead ends: 483 [2021-06-05 04:46:00,281 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 04:46:00,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 04:46:00,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 296. [2021-06-05 04:46:00,284 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 04:46:00,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2021-06-05 04:46:00,284 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2021-06-05 04:46:00,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:00,284 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2021-06-05 04:46:00,284 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 04:46:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2021-06-05 04:46:00,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:00,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:00,285 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:00,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4962,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:00,485 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:00,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:00,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1747645511, now seen corresponding path program 571 times [2021-06-05 04:46:00,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:00,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002447938] [2021-06-05 04:46:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:00,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:00,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002447938] [2021-06-05 04:46:00,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002447938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:00,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552421953] [2021-06-05 04:46:00,526 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 04:46:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:00,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:00,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:00,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552421953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:00,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:00,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:00,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625844328] [2021-06-05 04:46:00,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:00,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:00,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:00,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:00,713 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 04:46:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:00,914 INFO L93 Difference]: Finished difference Result 432 states and 1233 transitions. [2021-06-05 04:46:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:00,914 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 04:46:00,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:00,914 INFO L225 Difference]: With dead ends: 432 [2021-06-05 04:46:00,914 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 04:46:00,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 04:46:00,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 300. [2021-06-05 04:46:00,917 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 04:46:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-06-05 04:46:00,918 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-06-05 04:46:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:00,918 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-06-05 04:46:00,918 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 04:46:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-06-05 04:46:00,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:00,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:00,918 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 04:46:01,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4967 [2021-06-05 04:46:01,119 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:01,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:01,119 INFO L82 PathProgramCache]: Analyzing trace with hash -996245073, now seen corresponding path program 572 times [2021-06-05 04:46:01,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:01,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262867684] [2021-06-05 04:46:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:01,161 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 04:46:01,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:01,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262867684] [2021-06-05 04:46:01,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262867684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:01,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444712693] [2021-06-05 04:46:01,161 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 04:46:01,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:01,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:01,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:01,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:01,348 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 04:46:01,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444712693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:01,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:01,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:01,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53866626] [2021-06-05 04:46:01,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:01,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:01,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:01,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:01,349 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 04:46:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:01,605 INFO L93 Difference]: Finished difference Result 457 states and 1285 transitions. [2021-06-05 04:46:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:01,605 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 04:46:01,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:01,606 INFO L225 Difference]: With dead ends: 457 [2021-06-05 04:46:01,606 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 04:46:01,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:01,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 04:46:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 310. [2021-06-05 04:46:01,609 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 04:46:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-06-05 04:46:01,610 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-06-05 04:46:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:01,610 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-06-05 04:46:01,610 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 04:46:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-06-05 04:46:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:01,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:01,610 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:01,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4975,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:01,811 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:01,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:01,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1383298297, now seen corresponding path program 573 times [2021-06-05 04:46:01,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:01,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525621682] [2021-06-05 04:46:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:01,855 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 04:46:01,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:01,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525621682] [2021-06-05 04:46:01,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525621682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:01,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103538426] [2021-06-05 04:46:01,855 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 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 04:46:01,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:46:01,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:01,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:01,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:02,037 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 04:46:02,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103538426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:02,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:02,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:02,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514711544] [2021-06-05 04:46:02,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:02,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:02,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:02,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:02,038 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 04:46:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:02,240 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2021-06-05 04:46:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:02,241 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 04:46:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:02,241 INFO L225 Difference]: With dead ends: 428 [2021-06-05 04:46:02,241 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 04:46:02,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 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 04:46:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 04:46:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 298. [2021-06-05 04:46:02,244 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 04:46:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-06-05 04:46:02,245 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-06-05 04:46:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:02,245 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-06-05 04:46:02,245 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 04:46:02,245 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-06-05 04:46:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:02,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:02,245 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 04:46:02,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4981 [2021-06-05 04:46:02,446 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:02,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:02,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1186293593, now seen corresponding path program 574 times [2021-06-05 04:46:02,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:02,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591351871] [2021-06-05 04:46:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:02,488 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 04:46:02,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:02,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591351871] [2021-06-05 04:46:02,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591351871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:02,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143752534] [2021-06-05 04:46:02,488 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 04:46:02,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:02,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:02,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:02,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:02,657 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 04:46:02,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143752534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:02,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:02,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:02,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849077809] [2021-06-05 04:46:02,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:02,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:02,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:02,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:02,658 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 04:46:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:02,832 INFO L93 Difference]: Finished difference Result 463 states and 1300 transitions. [2021-06-05 04:46:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:02,832 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 04:46:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:02,833 INFO L225 Difference]: With dead ends: 463 [2021-06-05 04:46:02,833 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 04:46:02,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 04:46:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 312. [2021-06-05 04:46:02,836 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 04:46:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2021-06-05 04:46:02,837 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2021-06-05 04:46:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:02,837 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2021-06-05 04:46:02,837 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 04:46:02,837 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2021-06-05 04:46:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:02,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:02,837 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 04:46:03,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4985,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:03,037 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:03,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:03,038 INFO L82 PathProgramCache]: Analyzing trace with hash -729130333, now seen corresponding path program 575 times [2021-06-05 04:46:03,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:03,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144569280] [2021-06-05 04:46:03,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:03,081 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 04:46:03,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:03,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144569280] [2021-06-05 04:46:03,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144569280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:03,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164943744] [2021-06-05 04:46:03,082 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 04:46:03,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:03,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:03,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:03,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:03,252 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 04:46:03,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164943744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:03,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:03,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:03,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590196037] [2021-06-05 04:46:03,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:03,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:03,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:03,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:03,253 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 04:46:03,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:03,482 INFO L93 Difference]: Finished difference Result 463 states and 1306 transitions. [2021-06-05 04:46:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:03,482 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 04:46:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:03,483 INFO L225 Difference]: With dead ends: 463 [2021-06-05 04:46:03,483 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 04:46:03,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 218.6ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:03,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 04:46:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 310. [2021-06-05 04:46:03,486 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 04:46:03,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2021-06-05 04:46:03,487 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2021-06-05 04:46:03,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:03,487 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2021-06-05 04:46:03,487 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 04:46:03,487 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2021-06-05 04:46:03,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:03,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:03,487 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:03,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4991 [2021-06-05 04:46:03,687 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:03,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:03,688 INFO L82 PathProgramCache]: Analyzing trace with hash 311105465, now seen corresponding path program 576 times [2021-06-05 04:46:03,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:03,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373414352] [2021-06-05 04:46:03,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:03,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:03,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373414352] [2021-06-05 04:46:03,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373414352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:03,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808312553] [2021-06-05 04:46:03,731 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 04:46:03,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:03,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:03,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:03,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:03,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808312553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:03,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:03,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:46:03,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843755038] [2021-06-05 04:46:03,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:46:03,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:03,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:46:03,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:46:03,891 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 04:46:04,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:04,076 INFO L93 Difference]: Finished difference Result 438 states and 1256 transitions. [2021-06-05 04:46:04,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:04,076 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 04:46:04,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:04,077 INFO L225 Difference]: With dead ends: 438 [2021-06-05 04:46:04,077 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 04:46:04,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:04,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 04:46:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 294. [2021-06-05 04:46:04,079 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 04:46:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-06-05 04:46:04,080 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-06-05 04:46:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:04,080 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-06-05 04:46:04,080 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 04:46:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-06-05 04:46:04,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:04,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:04,080 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:04,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4996,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:04,281 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:04,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:04,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2009828929, now seen corresponding path program 577 times [2021-06-05 04:46:04,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:04,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967169133] [2021-06-05 04:46:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:04,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:04,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967169133] [2021-06-05 04:46:04,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967169133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:04,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865220917] [2021-06-05 04:46:04,322 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 04:46:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:04,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:04,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:04,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865220917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:04,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:04,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:04,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271574853] [2021-06-05 04:46:04,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:04,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:04,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:04,509 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 04:46:04,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:04,714 INFO L93 Difference]: Finished difference Result 422 states and 1208 transitions. [2021-06-05 04:46:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:04,714 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 04:46:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:04,714 INFO L225 Difference]: With dead ends: 422 [2021-06-05 04:46:04,715 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 04:46:04,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:04,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 04:46:04,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 300. [2021-06-05 04:46:04,717 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 04:46:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 881 transitions. [2021-06-05 04:46:04,718 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 881 transitions. Word has length 20 [2021-06-05 04:46:04,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:04,718 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 881 transitions. [2021-06-05 04:46:04,718 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 04:46:04,718 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 881 transitions. [2021-06-05 04:46:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:04,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:04,718 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 04:46:04,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4998 [2021-06-05 04:46:04,919 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:04,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:04,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1533737929, now seen corresponding path program 578 times [2021-06-05 04:46:04,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:04,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862260515] [2021-06-05 04:46:04,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:04,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:04,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862260515] [2021-06-05 04:46:04,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862260515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:04,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513891734] [2021-06-05 04:46:04,961 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 04:46:05,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:05,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:05,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:05,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:05,148 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 04:46:05,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513891734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:05,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:05,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:05,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498118899] [2021-06-05 04:46:05,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:05,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:05,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:05,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:05,149 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 04:46:05,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:05,406 INFO L93 Difference]: Finished difference Result 447 states and 1260 transitions. [2021-06-05 04:46:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:46:05,406 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 04:46:05,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:05,407 INFO L225 Difference]: With dead ends: 447 [2021-06-05 04:46:05,407 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 04:46:05,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 04:46:05,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 310. [2021-06-05 04:46:05,410 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 04:46:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 908 transitions. [2021-06-05 04:46:05,410 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 908 transitions. Word has length 20 [2021-06-05 04:46:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:05,410 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 908 transitions. [2021-06-05 04:46:05,410 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 04:46:05,410 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 908 transitions. [2021-06-05 04:46:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:05,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:05,411 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 04:46:05,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5006,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:05,611 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:05,611 INFO L82 PathProgramCache]: Analyzing trace with hash 845805441, now seen corresponding path program 579 times [2021-06-05 04:46:05,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:05,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304282613] [2021-06-05 04:46:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:05,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:05,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304282613] [2021-06-05 04:46:05,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304282613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:05,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417840319] [2021-06-05 04:46:05,657 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 04:46:05,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:46:05,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:05,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:05,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:05,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417840319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:05,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:05,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:05,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131539437] [2021-06-05 04:46:05,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:05,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:05,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:05,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:05,845 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 04:46:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:06,043 INFO L93 Difference]: Finished difference Result 418 states and 1206 transitions. [2021-06-05 04:46:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:06,043 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 04:46:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:06,044 INFO L225 Difference]: With dead ends: 418 [2021-06-05 04:46:06,044 INFO L226 Difference]: Without dead ends: 418 [2021-06-05 04:46:06,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-06-05 04:46:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 298. [2021-06-05 04:46:06,046 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 04:46:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 876 transitions. [2021-06-05 04:46:06,047 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 876 transitions. Word has length 20 [2021-06-05 04:46:06,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:06,047 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 876 transitions. [2021-06-05 04:46:06,047 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 04:46:06,047 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 876 transitions. [2021-06-05 04:46:06,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:06,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:06,047 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:06,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5013 [2021-06-05 04:46:06,248 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:06,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:06,248 INFO L82 PathProgramCache]: Analyzing trace with hash 648800737, now seen corresponding path program 580 times [2021-06-05 04:46:06,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:06,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468050858] [2021-06-05 04:46:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:06,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:06,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:06,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468050858] [2021-06-05 04:46:06,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468050858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:06,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67352111] [2021-06-05 04:46:06,291 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 04:46:06,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:06,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:06,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:06,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67352111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:06,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:06,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:06,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136219191] [2021-06-05 04:46:06,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:06,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:06,468 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 04:46:06,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:06,654 INFO L93 Difference]: Finished difference Result 453 states and 1275 transitions. [2021-06-05 04:46:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:06,654 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 04:46:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:06,655 INFO L225 Difference]: With dead ends: 453 [2021-06-05 04:46:06,655 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 04:46:06,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:06,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 04:46:06,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 312. [2021-06-05 04:46:06,658 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 04:46:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 915 transitions. [2021-06-05 04:46:06,658 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 915 transitions. Word has length 20 [2021-06-05 04:46:06,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:06,658 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 915 transitions. [2021-06-05 04:46:06,658 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 04:46:06,658 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 915 transitions. [2021-06-05 04:46:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:06,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:06,659 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:06,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5021 [2021-06-05 04:46:06,859 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:06,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:06,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1266623189, now seen corresponding path program 581 times [2021-06-05 04:46:06,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:06,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470019329] [2021-06-05 04:46:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:06,903 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 04:46:06,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:06,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470019329] [2021-06-05 04:46:06,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470019329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:06,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300071833] [2021-06-05 04:46:06,903 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 04:46:07,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:07,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:07,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:07,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:07,072 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 04:46:07,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300071833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:07,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:07,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:07,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940757087] [2021-06-05 04:46:07,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:07,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:07,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:07,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:07,073 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 04:46:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:07,282 INFO L93 Difference]: Finished difference Result 453 states and 1281 transitions. [2021-06-05 04:46:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:07,282 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 04:46:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:07,283 INFO L225 Difference]: With dead ends: 453 [2021-06-05 04:46:07,283 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 04:46:07,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:07,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 04:46:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 310. [2021-06-05 04:46:07,286 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 04:46:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 910 transitions. [2021-06-05 04:46:07,286 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 910 transitions. Word has length 20 [2021-06-05 04:46:07,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:07,286 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 910 transitions. [2021-06-05 04:46:07,286 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 04:46:07,286 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 910 transitions. [2021-06-05 04:46:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:07,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:07,287 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:07,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5027,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:07,487 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:07,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:07,487 INFO L82 PathProgramCache]: Analyzing trace with hash -226387391, now seen corresponding path program 582 times [2021-06-05 04:46:07,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:07,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271119293] [2021-06-05 04:46:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:07,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:07,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271119293] [2021-06-05 04:46:07,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271119293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:07,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41021634] [2021-06-05 04:46:07,531 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 04:46:07,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:07,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:07,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:07,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:07,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41021634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:07,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:07,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:07,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537631610] [2021-06-05 04:46:07,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:07,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:07,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:07,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:07,698 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 04:46:07,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:07,877 INFO L93 Difference]: Finished difference Result 428 states and 1231 transitions. [2021-06-05 04:46:07,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:07,877 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 04:46:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:07,877 INFO L225 Difference]: With dead ends: 428 [2021-06-05 04:46:07,877 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 04:46:07,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 04:46:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 296. [2021-06-05 04:46:07,880 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 04:46:07,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 871 transitions. [2021-06-05 04:46:07,881 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 871 transitions. Word has length 20 [2021-06-05 04:46:07,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:07,881 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 871 transitions. [2021-06-05 04:46:07,881 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 04:46:07,881 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 871 transitions. [2021-06-05 04:46:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:07,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:07,885 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 04:46:08,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5032 [2021-06-05 04:46:08,085 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:08,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:08,086 INFO L82 PathProgramCache]: Analyzing trace with hash -624132971, now seen corresponding path program 583 times [2021-06-05 04:46:08,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:08,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097430798] [2021-06-05 04:46:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:08,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:08,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097430798] [2021-06-05 04:46:08,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097430798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:08,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768769516] [2021-06-05 04:46:08,129 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 04:46:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:08,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:08,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:08,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768769516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:08,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:08,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:08,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798150625] [2021-06-05 04:46:08,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:08,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:08,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:08,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:08,296 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 04:46:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:08,509 INFO L93 Difference]: Finished difference Result 504 states and 1396 transitions. [2021-06-05 04:46:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:08,509 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 04:46:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:08,510 INFO L225 Difference]: With dead ends: 504 [2021-06-05 04:46:08,510 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 04:46:08,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 04:46:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 314. [2021-06-05 04:46:08,513 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 04:46:08,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 922 transitions. [2021-06-05 04:46:08,514 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 922 transitions. Word has length 20 [2021-06-05 04:46:08,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:08,514 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 922 transitions. [2021-06-05 04:46:08,514 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 04:46:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 922 transitions. [2021-06-05 04:46:08,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:08,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:08,514 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:08,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5034 [2021-06-05 04:46:08,715 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:08,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1755410399, now seen corresponding path program 584 times [2021-06-05 04:46:08,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:08,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879171950] [2021-06-05 04:46:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:08,760 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 04:46:08,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:08,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879171950] [2021-06-05 04:46:08,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879171950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:08,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975775083] [2021-06-05 04:46:08,760 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 04:46:08,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:08,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:08,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:08,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975775083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:08,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:08,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:08,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656880400] [2021-06-05 04:46:08,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:08,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:08,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:08,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:08,928 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 04:46:09,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:09,193 INFO L93 Difference]: Finished difference Result 504 states and 1402 transitions. [2021-06-05 04:46:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:46:09,194 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 04:46:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:09,194 INFO L225 Difference]: With dead ends: 504 [2021-06-05 04:46:09,194 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 04:46:09,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 04:46:09,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 312. [2021-06-05 04:46:09,198 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 04:46:09,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 917 transitions. [2021-06-05 04:46:09,198 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 917 transitions. Word has length 20 [2021-06-05 04:46:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:09,198 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 917 transitions. [2021-06-05 04:46:09,198 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 04:46:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 917 transitions. [2021-06-05 04:46:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:09,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:09,199 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 04:46:09,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5039,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:09,399 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:09,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:09,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1499321099, now seen corresponding path program 585 times [2021-06-05 04:46:09,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:09,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503504771] [2021-06-05 04:46:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:09,481 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 04:46:09,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:09,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503504771] [2021-06-05 04:46:09,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503504771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:09,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405917212] [2021-06-05 04:46:09,482 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 04:46:09,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:46:09,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:09,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:09,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:09,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405917212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:09,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:09,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:46:09,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668993668] [2021-06-05 04:46:09,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:46:09,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:09,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:46:09,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:46:09,654 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 04:46:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:09,851 INFO L93 Difference]: Finished difference Result 493 states and 1389 transitions. [2021-06-05 04:46:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:09,851 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 04:46:09,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:09,852 INFO L225 Difference]: With dead ends: 493 [2021-06-05 04:46:09,852 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 04:46:09,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:09,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 04:46:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 310. [2021-06-05 04:46:09,855 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 04:46:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 912 transitions. [2021-06-05 04:46:09,856 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 912 transitions. Word has length 20 [2021-06-05 04:46:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:09,856 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 912 transitions. [2021-06-05 04:46:09,856 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 04:46:09,856 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 912 transitions. [2021-06-05 04:46:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:46:09,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:09,856 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:10,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5044,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:10,057 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:10,057 INFO L82 PathProgramCache]: Analyzing trace with hash 260731841, now seen corresponding path program 586 times [2021-06-05 04:46:10,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:10,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113172101] [2021-06-05 04:46:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:10,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:10,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113172101] [2021-06-05 04:46:10,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113172101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:10,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589153202] [2021-06-05 04:46:10,099 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 04:46:10,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:10,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:10,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:10,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:46:10,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589153202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:10,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:10,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:46:10,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601293852] [2021-06-05 04:46:10,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:46:10,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:10,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:46:10,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:46:10,255 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 04:46:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:10,451 INFO L93 Difference]: Finished difference Result 483 states and 1362 transitions. [2021-06-05 04:46:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:46:10,451 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 04:46:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:10,452 INFO L225 Difference]: With dead ends: 483 [2021-06-05 04:46:10,452 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 04:46:10,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:10,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 04:46:10,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 294. [2021-06-05 04:46:10,455 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 04:46:10,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 866 transitions. [2021-06-05 04:46:10,455 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 866 transitions. Word has length 20 [2021-06-05 04:46:10,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:10,455 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 866 transitions. [2021-06-05 04:46:10,455 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 04:46:10,455 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 866 transitions. [2021-06-05 04:46:10,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:10,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:10,456 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 04:46:10,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5047 [2021-06-05 04:46:10,656 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:10,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:10,656 INFO L82 PathProgramCache]: Analyzing trace with hash 2020715594, now seen corresponding path program 587 times [2021-06-05 04:46:10,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:10,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740457843] [2021-06-05 04:46:10,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:10,745 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 04:46:10,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:10,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740457843] [2021-06-05 04:46:10,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740457843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:10,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507251362] [2021-06-05 04:46:10,745 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 04:46:10,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:10,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:10,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:46:10,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:11,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:11,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:11,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:11,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:11,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:11,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:11,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:11,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:11,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:11,273 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 24 treesize of output 1 [2021-06-05 04:46:11,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:11,333 INFO L628 ElimStorePlain]: treesize reduction 42, result has 65.0 percent of original size [2021-06-05 04:46:11,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:11,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:11,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:11,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:11,339 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:11,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:11,364 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 04:46:11,364 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:207, output treesize:48 [2021-06-05 04:46:11,495 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 04:46:11,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507251362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:11,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:11,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 04:46:11,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635196574] [2021-06-05 04:46:11,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:46:11,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:11,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:46:11,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:11,495 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 04:46:12,824 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2021-06-05 04:46:13,069 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-05 04:46:13,271 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-06-05 04:46:13,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:13,577 INFO L93 Difference]: Finished difference Result 742 states and 2196 transitions. [2021-06-05 04:46:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:46:13,577 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 04:46:13,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:13,578 INFO L225 Difference]: With dead ends: 742 [2021-06-05 04:46:13,578 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 04:46:13,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1842.6ms TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:46:13,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 04:46:13,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 354. [2021-06-05 04:46:13,582 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 04:46:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1058 transitions. [2021-06-05 04:46:13,583 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1058 transitions. Word has length 21 [2021-06-05 04:46:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:13,583 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 1058 transitions. [2021-06-05 04:46:13,583 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 04:46:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1058 transitions. [2021-06-05 04:46:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:13,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:13,583 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 04:46:13,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5049,590 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:13,784 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:13,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1242995883, now seen corresponding path program 1 times [2021-06-05 04:46:13,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:13,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780829919] [2021-06-05 04:46:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:13,865 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 04:46:13,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:13,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780829919] [2021-06-05 04:46:13,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780829919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:13,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933188434] [2021-06-05 04:46:13,866 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 04:46:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:13,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:13,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:14,042 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 12 treesize of output 8 [2021-06-05 04:46:14,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:14,044 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 13 treesize of output 9 [2021-06-05 04:46:14,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:14,047 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 13 treesize of output 9 [2021-06-05 04:46:14,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:14,063 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-06-05 04:46:14,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:14,064 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-05 04:46:14,098 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 04:46:14,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933188434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:14,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:14,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:14,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941136382] [2021-06-05 04:46:14,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:14,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:14,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:14,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:14,099 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 04:46:15,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:15,298 INFO L93 Difference]: Finished difference Result 803 states and 2292 transitions. [2021-06-05 04:46:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:46:15,298 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 04:46:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:15,299 INFO L225 Difference]: With dead ends: 803 [2021-06-05 04:46:15,299 INFO L226 Difference]: Without dead ends: 668 [2021-06-05 04:46:15,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 745.6ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:46:15,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-06-05 04:46:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 417. [2021-06-05 04:46:15,303 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 04:46:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1267 transitions. [2021-06-05 04:46:15,304 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1267 transitions. Word has length 21 [2021-06-05 04:46:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:15,304 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1267 transitions. [2021-06-05 04:46:15,304 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 04:46:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1267 transitions. [2021-06-05 04:46:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:15,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:15,305 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 04:46:15,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5101 [2021-06-05 04:46:15,521 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:15,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:15,521 INFO L82 PathProgramCache]: Analyzing trace with hash 315215179, now seen corresponding path program 2 times [2021-06-05 04:46:15,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:15,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88433788] [2021-06-05 04:46:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:15,597 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 04:46:15,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:15,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88433788] [2021-06-05 04:46:15,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88433788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:15,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680615720] [2021-06-05 04:46:15,597 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 04:46:15,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:15,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:15,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:15,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:15,782 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 04:46:15,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:15,785 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 04:46:15,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:15,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:15,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:15,807 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-06-05 04:46:15,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:15,807 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-05 04:46:15,848 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 04:46:15,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680615720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:15,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:15,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:15,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453031679] [2021-06-05 04:46:15,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:15,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:15,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:15,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:15,848 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 04:46:17,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:17,028 INFO L93 Difference]: Finished difference Result 1000 states and 2902 transitions. [2021-06-05 04:46:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:46:17,028 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 04:46:17,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:17,029 INFO L225 Difference]: With dead ends: 1000 [2021-06-05 04:46:17,029 INFO L226 Difference]: Without dead ends: 881 [2021-06-05 04:46:17,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 767.9ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:46:17,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-06-05 04:46:17,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 434. [2021-06-05 04:46:17,035 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 04:46:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1325 transitions. [2021-06-05 04:46:17,035 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1325 transitions. Word has length 21 [2021-06-05 04:46:17,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:17,035 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1325 transitions. [2021-06-05 04:46:17,035 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 04:46:17,035 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1325 transitions. [2021-06-05 04:46:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:17,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:17,036 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 04:46:17,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5106,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:17,236 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1023573397, now seen corresponding path program 3 times [2021-06-05 04:46:17,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:17,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491327891] [2021-06-05 04:46:17,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:17,344 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 04:46:17,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:17,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491327891] [2021-06-05 04:46:17,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491327891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:17,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245836382] [2021-06-05 04:46:17,344 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 04:46:17,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:17,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:17,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:17,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:17,510 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 12 treesize of output 8 [2021-06-05 04:46:17,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:17,513 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 04:46:17,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:17,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:17,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:17,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:17,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:17,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:17,522 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:17,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:17,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:17,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:17,527 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:17,561 INFO L628 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2021-06-05 04:46:17,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:46:17,562 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:136, output treesize:40 [2021-06-05 04:46:17,628 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 04:46:17,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245836382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:17,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:17,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:17,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670396636] [2021-06-05 04:46:17,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:17,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:17,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:17,629 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 04:46:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:19,205 INFO L93 Difference]: Finished difference Result 1044 states and 2937 transitions. [2021-06-05 04:46:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:46:19,205 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 04:46:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:19,206 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 04:46:19,206 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 04:46:19,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1068.8ms TimeCoverageRelationStatistics Valid=308, Invalid=1672, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:46:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 04:46:19,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 436. [2021-06-05 04:46:19,212 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 04:46:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1347 transitions. [2021-06-05 04:46:19,212 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1347 transitions. Word has length 21 [2021-06-05 04:46:19,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:19,212 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1347 transitions. [2021-06-05 04:46:19,212 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 04:46:19,212 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1347 transitions. [2021-06-05 04:46:19,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:19,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:19,213 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 04:46:19,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5113 [2021-06-05 04:46:19,413 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:19,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:19,414 INFO L82 PathProgramCache]: Analyzing trace with hash -127683961, now seen corresponding path program 4 times [2021-06-05 04:46:19,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:19,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156338200] [2021-06-05 04:46:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:19,493 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 04:46:19,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:19,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156338200] [2021-06-05 04:46:19,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156338200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:19,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709824899] [2021-06-05 04:46:19,494 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 04:46:19,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:19,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:19,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:19,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:19,674 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 12 treesize of output 8 [2021-06-05 04:46:19,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:19,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:19,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:19,679 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 13 treesize of output 9 [2021-06-05 04:46:19,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:19,696 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-06-05 04:46:19,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:19,697 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-05 04:46:19,733 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 04:46:19,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709824899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:19,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:19,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:19,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877503380] [2021-06-05 04:46:19,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:19,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:19,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:19,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:19,734 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 04:46:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:20,777 INFO L93 Difference]: Finished difference Result 887 states and 2629 transitions. [2021-06-05 04:46:20,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:46:20,778 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 04:46:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:20,778 INFO L225 Difference]: With dead ends: 887 [2021-06-05 04:46:20,779 INFO L226 Difference]: Without dead ends: 768 [2021-06-05 04:46:20,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 654.5ms TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:46:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-06-05 04:46:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 467. [2021-06-05 04:46:20,783 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 04:46:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1458 transitions. [2021-06-05 04:46:20,784 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1458 transitions. Word has length 21 [2021-06-05 04:46:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:20,784 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1458 transitions. [2021-06-05 04:46:20,784 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 04:46:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1458 transitions. [2021-06-05 04:46:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:20,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:20,785 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 04:46:20,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5122 [2021-06-05 04:46:20,985 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:20,985 INFO L82 PathProgramCache]: Analyzing trace with hash 580674257, now seen corresponding path program 5 times [2021-06-05 04:46:20,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:20,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188647892] [2021-06-05 04:46:20,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:21,061 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 04:46:21,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:21,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188647892] [2021-06-05 04:46:21,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188647892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:21,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079029317] [2021-06-05 04:46:21,061 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 04:46:21,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:21,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:21,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:21,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:21,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:21,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:21,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:21,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,232 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 04:46:21,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,235 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 04:46:21,235 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,238 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 13 treesize of output 9 [2021-06-05 04:46:21,238 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:21,243 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:21,278 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 04:46:21,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:46:21,279 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 04:46:21,349 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 04:46:21,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079029317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:21,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:21,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:21,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892747357] [2021-06-05 04:46:21,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:21,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:21,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:21,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:21,350 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 04:46:22,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:22,653 INFO L93 Difference]: Finished difference Result 1114 states and 3228 transitions. [2021-06-05 04:46:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:46:22,653 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 04:46:22,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:22,654 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 04:46:22,654 INFO L226 Difference]: Without dead ends: 953 [2021-06-05 04:46:22,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 867.0ms TimeCoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:46:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-06-05 04:46:22,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 450. [2021-06-05 04:46:22,660 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 04:46:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1397 transitions. [2021-06-05 04:46:22,661 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1397 transitions. Word has length 21 [2021-06-05 04:46:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:22,661 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1397 transitions. [2021-06-05 04:46:22,661 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 04:46:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1397 transitions. [2021-06-05 04:46:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:22,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:22,661 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:22,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5127 [2021-06-05 04:46:22,862 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:22,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:22,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1526109863, now seen corresponding path program 6 times [2021-06-05 04:46:22,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:22,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593242587] [2021-06-05 04:46:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:22,954 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 04:46:22,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:22,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593242587] [2021-06-05 04:46:22,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593242587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:22,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629779114] [2021-06-05 04:46:22,954 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 04:46:23,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:23,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:23,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:23,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:23,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:23,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:23,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:23,153 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:23,155 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:23,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:23,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:23,158 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:23,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:23,161 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:23,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:23,164 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:23,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:23,166 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:23,201 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 04:46:23,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:46:23,202 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 04:46:23,269 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 04:46:23,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629779114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:23,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:23,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:23,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354470858] [2021-06-05 04:46:23,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:23,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:23,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:23,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:23,269 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 04:46:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:24,742 INFO L93 Difference]: Finished difference Result 983 states and 2836 transitions. [2021-06-05 04:46:24,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:46:24,742 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 04:46:24,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:24,743 INFO L225 Difference]: With dead ends: 983 [2021-06-05 04:46:24,743 INFO L226 Difference]: Without dead ends: 790 [2021-06-05 04:46:24,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1037.4ms TimeCoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:46:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-06-05 04:46:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 456. [2021-06-05 04:46:24,749 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 04:46:24,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1429 transitions. [2021-06-05 04:46:24,750 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1429 transitions. Word has length 21 [2021-06-05 04:46:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:24,750 INFO L482 AbstractCegarLoop]: Abstraction has 456 states and 1429 transitions. [2021-06-05 04:46:24,750 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 04:46:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1429 transitions. [2021-06-05 04:46:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:24,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:24,750 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 04:46:24,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5136,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:24,951 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:24,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1817626865, now seen corresponding path program 7 times [2021-06-05 04:46:24,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:24,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478264748] [2021-06-05 04:46:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:25,032 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 04:46:25,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:25,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478264748] [2021-06-05 04:46:25,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478264748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:25,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895235235] [2021-06-05 04:46:25,032 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 04:46:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:25,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:25,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:25,207 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 04:46:25,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:25,210 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 04:46:25,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:25,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:25,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:25,229 INFO L628 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2021-06-05 04:46:25,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:25,229 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:59, output treesize:18 [2021-06-05 04:46:25,265 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 04:46:25,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895235235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:25,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:25,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:25,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051623178] [2021-06-05 04:46:25,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:25,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:25,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:25,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:25,266 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 04:46:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:26,373 INFO L93 Difference]: Finished difference Result 962 states and 2828 transitions. [2021-06-05 04:46:26,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:46:26,373 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 04:46:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:26,374 INFO L225 Difference]: With dead ends: 962 [2021-06-05 04:46:26,374 INFO L226 Difference]: Without dead ends: 843 [2021-06-05 04:46:26,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 648.8ms TimeCoverageRelationStatistics Valid=224, Invalid=1336, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:46:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-06-05 04:46:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 477. [2021-06-05 04:46:26,379 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 04:46:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1499 transitions. [2021-06-05 04:46:26,380 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1499 transitions. Word has length 21 [2021-06-05 04:46:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:26,380 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1499 transitions. [2021-06-05 04:46:26,380 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 04:46:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1499 transitions. [2021-06-05 04:46:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:26,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:26,381 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:26,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5144 [2021-06-05 04:46:26,581 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:26,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:26,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1109268647, now seen corresponding path program 8 times [2021-06-05 04:46:26,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:26,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695871315] [2021-06-05 04:46:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:26,657 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 04:46:26,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:26,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695871315] [2021-06-05 04:46:26,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695871315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:26,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344843575] [2021-06-05 04:46:26,657 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 04:46:26,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:26,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:26,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:26,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:26,822 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 04:46:26,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:26,825 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 04:46:26,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:26,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:26,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:26,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:26,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:26,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:26,833 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:26,835 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 13 treesize of output 9 [2021-06-05 04:46:26,836 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:26,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:26,839 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:26,875 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 04:46:26,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:46:26,876 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 04:46:26,944 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 04:46:26,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344843575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:26,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:26,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:26,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192057245] [2021-06-05 04:46:26,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:26,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:26,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:26,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:26,945 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 04:46:28,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:28,252 INFO L93 Difference]: Finished difference Result 1189 states and 3427 transitions. [2021-06-05 04:46:28,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:46:28,252 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 04:46:28,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:28,253 INFO L225 Difference]: With dead ends: 1189 [2021-06-05 04:46:28,253 INFO L226 Difference]: Without dead ends: 1028 [2021-06-05 04:46:28,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 840.4ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:46:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-06-05 04:46:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 460. [2021-06-05 04:46:28,259 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 04:46:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1438 transitions. [2021-06-05 04:46:28,260 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1438 transitions. Word has length 21 [2021-06-05 04:46:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:28,260 INFO L482 AbstractCegarLoop]: Abstraction has 460 states and 1438 transitions. [2021-06-05 04:46:28,260 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 04:46:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1438 transitions. [2021-06-05 04:46:28,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:28,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:28,261 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:28,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5151,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:28,473 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:28,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:28,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1078914529, now seen corresponding path program 9 times [2021-06-05 04:46:28,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:28,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470954722] [2021-06-05 04:46:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:28,547 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 04:46:28,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:28,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470954722] [2021-06-05 04:46:28,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470954722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:28,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910832886] [2021-06-05 04:46:28,548 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 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 04:46:28,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:28,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:28,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:46:28,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:28,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:28,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:28,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:28,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:28,781 INFO L628 ElimStorePlain]: treesize reduction 12, result has 62.5 percent of original size [2021-06-05 04:46:28,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:28,782 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:43, output treesize:20 [2021-06-05 04:46:28,829 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 04:46:28,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910832886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:28,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:28,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 04:46:28,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866670418] [2021-06-05 04:46:28,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:28,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:28,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:28,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:28,830 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 04:46:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:29,764 INFO L93 Difference]: Finished difference Result 758 states and 2219 transitions. [2021-06-05 04:46:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:29,764 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 04:46:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:29,765 INFO L225 Difference]: With dead ends: 758 [2021-06-05 04:46:29,765 INFO L226 Difference]: Without dead ends: 618 [2021-06-05 04:46:29,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 895.4ms TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:46:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-06-05 04:46:29,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 472. [2021-06-05 04:46:29,770 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 04:46:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1467 transitions. [2021-06-05 04:46:29,770 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1467 transitions. Word has length 21 [2021-06-05 04:46:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:29,770 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1467 transitions. [2021-06-05 04:46:29,771 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 04:46:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1467 transitions. [2021-06-05 04:46:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:29,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:29,771 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 04:46:29,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5161 [2021-06-05 04:46:29,971 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:29,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:29,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1157086666, now seen corresponding path program 588 times [2021-06-05 04:46:29,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:29,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672948799] [2021-06-05 04:46:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:30,074 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 04:46:30,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:30,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672948799] [2021-06-05 04:46:30,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672948799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:30,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421149648] [2021-06-05 04:46:30,074 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 04:46:30,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:46:30,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:46:30,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:30,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:30,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:30,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:30,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,530 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:30,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,533 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 12 treesize of output 8 [2021-06-05 04:46:30,534 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:30,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:30,540 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:30,544 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:30,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:30,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:30,548 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:30,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:30,553 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:30,626 INFO L628 ElimStorePlain]: treesize reduction 51, result has 64.6 percent of original size [2021-06-05 04:46:30,627 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 04:46:30,627 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:291, output treesize:49 [2021-06-05 04:46:30,705 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 04:46:30,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421149648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:30,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:30,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:30,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621418141] [2021-06-05 04:46:30,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:30,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:30,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:30,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:30,705 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 04:46:31,029 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-06-05 04:46:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:31,403 INFO L93 Difference]: Finished difference Result 764 states and 2359 transitions. [2021-06-05 04:46:31,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:31,404 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 04:46:31,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:31,405 INFO L225 Difference]: With dead ends: 764 [2021-06-05 04:46:31,405 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 04:46:31,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 591.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:46:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 04:46:31,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 490. [2021-06-05 04:46:31,409 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 04:46:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1539 transitions. [2021-06-05 04:46:31,410 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1539 transitions. Word has length 21 [2021-06-05 04:46:31,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:31,410 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1539 transitions. [2021-06-05 04:46:31,410 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 04:46:31,410 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1539 transitions. [2021-06-05 04:46:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:31,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:31,411 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 04:46:31,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5171 [2021-06-05 04:46:31,611 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:31,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:31,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1698401856, now seen corresponding path program 589 times [2021-06-05 04:46:31,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:31,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103067059] [2021-06-05 04:46:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:31,725 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 04:46:31,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:31,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103067059] [2021-06-05 04:46:31,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103067059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:31,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290010906] [2021-06-05 04:46:31,725 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 04:46:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:31,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:46:31,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:32,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:32,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:32,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:32,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:32,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:32,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:32,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:32,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:32,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:32,260 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:32,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:32,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:32,264 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:32,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:32,268 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 12 [2021-06-05 04:46:32,268 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:32,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:32,272 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:32,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:32,305 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 04:46:32,305 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:255, output treesize:48 [2021-06-05 04:46:32,442 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 04:46:32,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290010906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:32,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:32,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 04:46:32,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937965872] [2021-06-05 04:46:32,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:32,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:32,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:32,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:32,443 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 04:46:33,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:33,587 INFO L93 Difference]: Finished difference Result 834 states and 2548 transitions. [2021-06-05 04:46:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:46:33,588 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 04:46:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:33,589 INFO L225 Difference]: With dead ends: 834 [2021-06-05 04:46:33,589 INFO L226 Difference]: Without dead ends: 765 [2021-06-05 04:46:33,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1056.3ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:46:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-06-05 04:46:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 497. [2021-06-05 04:46:33,594 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 04:46:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1569 transitions. [2021-06-05 04:46:33,595 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1569 transitions. Word has length 21 [2021-06-05 04:46:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:33,595 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1569 transitions. [2021-06-05 04:46:33,595 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 04:46:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1569 transitions. [2021-06-05 04:46:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:33,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:33,595 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 04:46:33,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5221 [2021-06-05 04:46:33,796 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash -777988342, now seen corresponding path program 590 times [2021-06-05 04:46:33,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:33,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317355258] [2021-06-05 04:46:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:33,905 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 04:46:33,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:33,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317355258] [2021-06-05 04:46:33,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317355258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:33,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36902579] [2021-06-05 04:46:33,905 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 04:46:34,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:34,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:34,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:46:34,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:34,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:34,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,415 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 25 treesize of output 13 [2021-06-05 04:46:34,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,420 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 04:46:34,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,428 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 24 treesize of output 1 [2021-06-05 04:46:34,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,433 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 17 treesize of output 8 [2021-06-05 04:46:34,433 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,437 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 12 [2021-06-05 04:46:34,438 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:34,444 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:34,449 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:34,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:34,453 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:34,606 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 04:46:34,606 INFO L628 ElimStorePlain]: treesize reduction 5, result has 97.4 percent of original size [2021-06-05 04:46:34,609 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 04:46:34,609 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:108 [2021-06-05 04:46:34,806 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 04:46:34,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36902579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:34,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:34,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:46:34,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488710428] [2021-06-05 04:46:34,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:46:34,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:34,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:46:34,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:46:34,807 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 04:46:35,357 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-06-05 04:46:35,551 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-06-05 04:46:35,738 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-05 04:46:35,925 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-06-05 04:46:36,106 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 04:46:36,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:36,177 INFO L93 Difference]: Finished difference Result 823 states and 2486 transitions. [2021-06-05 04:46:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:46:36,177 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 04:46:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:36,178 INFO L225 Difference]: With dead ends: 823 [2021-06-05 04:46:36,178 INFO L226 Difference]: Without dead ends: 729 [2021-06-05 04:46:36,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1360.6ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:46:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-06-05 04:46:36,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 482. [2021-06-05 04:46:36,183 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 04:46:36,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1504 transitions. [2021-06-05 04:46:36,183 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1504 transitions. Word has length 21 [2021-06-05 04:46:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:36,183 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1504 transitions. [2021-06-05 04:46:36,184 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 04:46:36,184 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1504 transitions. [2021-06-05 04:46:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:36,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:36,184 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 04:46:36,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5274,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:36,385 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:36,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1120947862, now seen corresponding path program 591 times [2021-06-05 04:46:36,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:36,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678019751] [2021-06-05 04:46:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:36,501 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 04:46:36,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:36,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678019751] [2021-06-05 04:46:36,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678019751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:36,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146441173] [2021-06-05 04:46:36,501 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 04:46:36,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:36,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:36,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:46:36,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:36,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:36,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:36,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:36,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:36,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:36,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:36,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:36,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:36,915 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 13 treesize of output 9 [2021-06-05 04:46:36,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:36,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:36,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:36,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:36,920 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:36,922 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 04:46:36,923 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:36,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:36,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:36,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:36,928 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:36,931 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:36,931 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:37,000 INFO L628 ElimStorePlain]: treesize reduction 26, result has 78.2 percent of original size [2021-06-05 04:46:37,003 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 04:46:37,003 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:295, output treesize:49 [2021-06-05 04:46:37,085 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 04:46:37,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146441173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:37,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:37,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:46:37,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969940215] [2021-06-05 04:46:37,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:46:37,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:37,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:46:37,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:46:37,086 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 04:46:37,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:37,671 INFO L93 Difference]: Finished difference Result 767 states and 2356 transitions. [2021-06-05 04:46:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:46:37,671 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 04:46:37,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:37,672 INFO L225 Difference]: With dead ends: 767 [2021-06-05 04:46:37,672 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 04:46:37,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 531.9ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:46:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 04:46:37,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 498. [2021-06-05 04:46:37,677 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 04:46:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1569 transitions. [2021-06-05 04:46:37,678 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1569 transitions. Word has length 21 [2021-06-05 04:46:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:37,678 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1569 transitions. [2021-06-05 04:46:37,678 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 04:46:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1569 transitions. [2021-06-05 04:46:37,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:37,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:37,678 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 04:46:37,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5349 [2021-06-05 04:46:37,879 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:37,879 INFO L82 PathProgramCache]: Analyzing trace with hash 697629236, now seen corresponding path program 592 times [2021-06-05 04:46:37,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:37,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831778798] [2021-06-05 04:46:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:38,014 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 04:46:38,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:38,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831778798] [2021-06-05 04:46:38,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831778798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:38,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000219250] [2021-06-05 04:46:38,014 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 04:46:38,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:38,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:38,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:46:38,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:38,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:38,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:38,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:38,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:38,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:38,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:38,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:38,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:38,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:38,485 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:38,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,489 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 24 treesize of output 1 [2021-06-05 04:46:38,489 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:38,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:38,493 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:38,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:38,496 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:38,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:38,500 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 11 treesize of output 7 [2021-06-05 04:46:38,500 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:38,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:46:38,555 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 04:46:38,555 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-06-05 04:46:38,747 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 04:46:38,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000219250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:38,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:38,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 04:46:38,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789367080] [2021-06-05 04:46:38,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:38,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:38,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:38,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:38,747 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 04:46:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:39,754 INFO L93 Difference]: Finished difference Result 811 states and 2461 transitions. [2021-06-05 04:46:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:46:39,754 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 04:46:39,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:39,755 INFO L225 Difference]: With dead ends: 811 [2021-06-05 04:46:39,755 INFO L226 Difference]: Without dead ends: 742 [2021-06-05 04:46:39,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1007.1ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:46:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-06-05 04:46:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 491. [2021-06-05 04:46:39,760 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 04:46:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1539 transitions. [2021-06-05 04:46:39,761 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1539 transitions. Word has length 21 [2021-06-05 04:46:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:39,761 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1539 transitions. [2021-06-05 04:46:39,761 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 04:46:39,761 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1539 transitions. [2021-06-05 04:46:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:39,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:39,761 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 04:46:39,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5391,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:39,962 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:39,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:39,962 INFO L82 PathProgramCache]: Analyzing trace with hash -363148854, now seen corresponding path program 593 times [2021-06-05 04:46:39,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:39,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420852806] [2021-06-05 04:46:39,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:40,090 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 04:46:40,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:40,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420852806] [2021-06-05 04:46:40,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420852806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:40,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441871394] [2021-06-05 04:46:40,090 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 04:46:40,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:46:40,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:40,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:46:40,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:40,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,520 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 18 treesize of output 1 [2021-06-05 04:46:40,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,524 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 18 treesize of output 1 [2021-06-05 04:46:40,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:40,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:40,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,537 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 13 treesize of output 9 [2021-06-05 04:46:40,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:40,553 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:40,558 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:40,563 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:40,566 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:40,570 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:40,574 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:40,577 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:40,581 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:46:40,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:46:40,586 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:40,590 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:40,593 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:40,674 INFO L628 ElimStorePlain]: treesize reduction 146, result has 41.1 percent of original size [2021-06-05 04:46:40,676 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 04:46:40,676 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:677, output treesize:70 [2021-06-05 04:46:40,841 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 04:46:40,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441871394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:40,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:40,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 04:46:40,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544214886] [2021-06-05 04:46:40,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:46:40,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:40,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:46:40,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:46:40,842 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 04:46:41,526 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 04:46:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:41,692 INFO L93 Difference]: Finished difference Result 931 states and 2746 transitions. [2021-06-05 04:46:41,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:46:41,693 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 04:46:41,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:41,694 INFO L225 Difference]: With dead ends: 931 [2021-06-05 04:46:41,694 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 04:46:41,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 892.9ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:46:41,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 04:46:41,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 515. [2021-06-05 04:46:41,699 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 04:46:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1646 transitions. [2021-06-05 04:46:41,700 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1646 transitions. Word has length 21 [2021-06-05 04:46:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:41,700 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1646 transitions. [2021-06-05 04:46:41,700 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 04:46:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1646 transitions. [2021-06-05 04:46:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:41,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:41,701 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 04:46:41,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5465 [2021-06-05 04:46:41,901 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:41,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1269902538, now seen corresponding path program 594 times [2021-06-05 04:46:41,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:41,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226859970] [2021-06-05 04:46:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:42,046 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 04:46:42,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:42,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226859970] [2021-06-05 04:46:42,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226859970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:42,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412800006] [2021-06-05 04:46:42,046 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 04:46:42,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:46:42,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:42,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:46:42,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:42,276 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 18 treesize of output 12 [2021-06-05 04:46:42,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:42,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:42,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:42,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:42,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:42,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:42,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:42,289 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 11 treesize of output 7 [2021-06-05 04:46:42,290 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:42,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:42,307 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:42,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:42,310 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:42,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:42,313 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:42,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:42,316 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:42,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:42,319 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:42,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:42,322 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:42,381 INFO L628 ElimStorePlain]: treesize reduction 28, result has 73.8 percent of original size [2021-06-05 04:46:42,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:46:42,382 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:384, output treesize:79 [2021-06-05 04:46:42,507 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 04:46:42,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412800006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:42,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:42,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 04:46:42,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56546991] [2021-06-05 04:46:42,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:46:42,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:42,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:46:42,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:42,508 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 04:46:43,177 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 04:46:43,330 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-05 04:46:43,482 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 04:46:43,652 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 04:46:44,043 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 04:46:44,181 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-05 04:46:44,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:44,188 INFO L93 Difference]: Finished difference Result 1021 states and 2942 transitions. [2021-06-05 04:46:44,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:46:44,188 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 04:46:44,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:44,190 INFO L225 Difference]: With dead ends: 1021 [2021-06-05 04:46:44,190 INFO L226 Difference]: Without dead ends: 915 [2021-06-05 04:46:44,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1614.1ms TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:46:44,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-06-05 04:46:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 510. [2021-06-05 04:46:44,195 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 04:46:44,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1619 transitions. [2021-06-05 04:46:44,196 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1619 transitions. Word has length 21 [2021-06-05 04:46:44,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:44,196 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1619 transitions. [2021-06-05 04:46:44,196 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 04:46:44,196 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1619 transitions. [2021-06-05 04:46:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:44,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:44,197 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 04:46:44,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5578,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:44,397 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:44,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:44,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1917789974, now seen corresponding path program 595 times [2021-06-05 04:46:44,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:44,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554294323] [2021-06-05 04:46:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:44,542 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 04:46:44,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:44,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554294323] [2021-06-05 04:46:44,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554294323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:44,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887911452] [2021-06-05 04:46:44,543 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 04:46:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:44,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:46:44,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:44,797 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 04:46:44,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:44,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:44,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:44,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,807 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 04:46:44,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:44,826 INFO L628 ElimStorePlain]: treesize reduction 16, result has 65.2 percent of original size [2021-06-05 04:46:44,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:46:44,826 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:122, output treesize:30 [2021-06-05 04:46:44,881 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 04:46:44,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887911452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:44,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:44,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-06-05 04:46:44,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769886694] [2021-06-05 04:46:44,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:46:44,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:44,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:46:44,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:46:44,882 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 04:46:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:45,622 INFO L93 Difference]: Finished difference Result 875 states and 2605 transitions. [2021-06-05 04:46:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:46:45,623 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 04:46:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:45,624 INFO L225 Difference]: With dead ends: 875 [2021-06-05 04:46:45,624 INFO L226 Difference]: Without dead ends: 806 [2021-06-05 04:46:45,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:46:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-06-05 04:46:45,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 514. [2021-06-05 04:46:45,629 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 04:46:45,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1633 transitions. [2021-06-05 04:46:45,630 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1633 transitions. Word has length 21 [2021-06-05 04:46:45,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:45,630 INFO L482 AbstractCegarLoop]: Abstraction has 514 states and 1633 transitions. [2021-06-05 04:46:45,630 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 04:46:45,630 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1633 transitions. [2021-06-05 04:46:45,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:45,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:45,631 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 04:46:45,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5598,607 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:45,831 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:45,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:45,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1093182143, now seen corresponding path program 10 times [2021-06-05 04:46:45,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:45,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624975333] [2021-06-05 04:46:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:45,923 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 04:46:45,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:45,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624975333] [2021-06-05 04:46:45,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624975333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:45,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320557106] [2021-06-05 04:46:45,923 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 04:46:46,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:46,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:46,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:46,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:46,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:46,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,094 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 5 treesize of output 3 [2021-06-05 04:46:46,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,096 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 12 treesize of output 8 [2021-06-05 04:46:46,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:46,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:46,102 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:46,136 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 04:46:46,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:46:46,136 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 04:46:46,202 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 04:46:46,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320557106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:46,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:46,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:46,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952997080] [2021-06-05 04:46:46,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:46,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:46,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:46,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:46,203 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 04:46:47,606 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 04:46:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:48,080 INFO L93 Difference]: Finished difference Result 1303 states and 3840 transitions. [2021-06-05 04:46:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:46:48,081 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 04:46:48,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:48,082 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 04:46:48,082 INFO L226 Difference]: Without dead ends: 1100 [2021-06-05 04:46:48,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1471.5ms TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:46:48,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-06-05 04:46:48,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 554. [2021-06-05 04:46:48,089 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 04:46:48,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1785 transitions. [2021-06-05 04:46:48,090 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1785 transitions. Word has length 21 [2021-06-05 04:46:48,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:48,090 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1785 transitions. [2021-06-05 04:46:48,090 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 04:46:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1785 transitions. [2021-06-05 04:46:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:48,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:48,091 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:48,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5611,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:48,291 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:48,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1361928571, now seen corresponding path program 11 times [2021-06-05 04:46:48,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:48,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462608854] [2021-06-05 04:46:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:48,386 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 04:46:48,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:48,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462608854] [2021-06-05 04:46:48,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462608854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:48,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400184992] [2021-06-05 04:46:48,387 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 04:46:48,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:48,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:48,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:46:48,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:48,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:48,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,567 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 04:46:48,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,570 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 04:46:48,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,573 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 13 treesize of output 9 [2021-06-05 04:46:48,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:48,576 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:48,609 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 04:46:48,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:46:48,610 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 04:46:48,697 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 04:46:48,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400184992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:48,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:48,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:48,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740647365] [2021-06-05 04:46:48,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:48,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:48,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:48,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:48,698 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 04:46:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:50,083 INFO L93 Difference]: Finished difference Result 1175 states and 3509 transitions. [2021-06-05 04:46:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:46:50,084 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 04:46:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:50,085 INFO L225 Difference]: With dead ends: 1175 [2021-06-05 04:46:50,085 INFO L226 Difference]: Without dead ends: 1007 [2021-06-05 04:46:50,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 995.4ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:46:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-06-05 04:46:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 554. [2021-06-05 04:46:50,091 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 04:46:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1785 transitions. [2021-06-05 04:46:50,092 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1785 transitions. Word has length 21 [2021-06-05 04:46:50,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:50,092 INFO L482 AbstractCegarLoop]: Abstraction has 554 states and 1785 transitions. [2021-06-05 04:46:50,092 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 04:46:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1785 transitions. [2021-06-05 04:46:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:50,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:50,093 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:50,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5620,609 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:50,293 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:50,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:50,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1696858245, now seen corresponding path program 12 times [2021-06-05 04:46:50,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:50,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859427111] [2021-06-05 04:46:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:50,388 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 04:46:50,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:50,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859427111] [2021-06-05 04:46:50,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859427111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:50,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475812290] [2021-06-05 04:46:50,388 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 04:46:50,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:46:50,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:50,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:50,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:50,578 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 04:46:50,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:50,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:50,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:50,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:50,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:50,586 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 13 treesize of output 9 [2021-06-05 04:46:50,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:50,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:50,589 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:50,623 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 04:46:50,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:46:50,624 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 04:46:50,691 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 04:46:50,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475812290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:50,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:50,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:50,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504980601] [2021-06-05 04:46:50,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:50,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:50,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:50,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:50,692 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 04:46:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:52,397 INFO L93 Difference]: Finished difference Result 1201 states and 3525 transitions. [2021-06-05 04:46:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:46:52,397 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 04:46:52,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:52,398 INFO L225 Difference]: With dead ends: 1201 [2021-06-05 04:46:52,398 INFO L226 Difference]: Without dead ends: 1009 [2021-06-05 04:46:52,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1331.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:46:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-05 04:46:52,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 561. [2021-06-05 04:46:52,405 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 04:46:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1801 transitions. [2021-06-05 04:46:52,406 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1801 transitions. Word has length 21 [2021-06-05 04:46:52,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:52,406 INFO L482 AbstractCegarLoop]: Abstraction has 561 states and 1801 transitions. [2021-06-05 04:46:52,406 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 04:46:52,406 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1801 transitions. [2021-06-05 04:46:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:52,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:52,407 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:46:52,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5633,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:52,607 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:52,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash 219055557, now seen corresponding path program 13 times [2021-06-05 04:46:52,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:52,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233071514] [2021-06-05 04:46:52,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:52,705 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 04:46:52,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:52,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233071514] [2021-06-05 04:46:52,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233071514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:52,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500173698] [2021-06-05 04:46:52,705 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 04:46:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:52,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:52,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:52,932 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 04:46:52,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500173698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:52,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:52,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:52,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918416967] [2021-06-05 04:46:52,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:52,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:52,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:52,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:52,933 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 04:46:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:54,361 INFO L93 Difference]: Finished difference Result 1086 states and 3218 transitions. [2021-06-05 04:46:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:46:54,361 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 04:46:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:54,362 INFO L225 Difference]: With dead ends: 1086 [2021-06-05 04:46:54,362 INFO L226 Difference]: Without dead ends: 857 [2021-06-05 04:46:54,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1103.3ms TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:46:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-05 04:46:54,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 564. [2021-06-05 04:46:54,368 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 04:46:54,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1803 transitions. [2021-06-05 04:46:54,369 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1803 transitions. Word has length 21 [2021-06-05 04:46:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:54,369 INFO L482 AbstractCegarLoop]: Abstraction has 564 states and 1803 transitions. [2021-06-05 04:46:54,369 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 04:46:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1803 transitions. [2021-06-05 04:46:54,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:54,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:54,370 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 04:46:54,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5642,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:54,570 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:54,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:54,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1157506963, now seen corresponding path program 14 times [2021-06-05 04:46:54,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:54,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102037790] [2021-06-05 04:46:54,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:54,653 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 04:46:54,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:54,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102037790] [2021-06-05 04:46:54,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102037790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:54,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643561134] [2021-06-05 04:46:54,654 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 04:46:54,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:46:54,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:54,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:54,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:54,852 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 12 treesize of output 8 [2021-06-05 04:46:54,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:54,855 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 5 treesize of output 3 [2021-06-05 04:46:54,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:54,857 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 04:46:54,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:54,860 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 13 treesize of output 9 [2021-06-05 04:46:54,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:54,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:54,864 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:54,898 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 04:46:54,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:46:54,899 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 04:46:54,966 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 04:46:54,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643561134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:54,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:54,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:54,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370240288] [2021-06-05 04:46:54,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:54,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:54,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:54,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:54,966 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 04:46:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:56,274 INFO L93 Difference]: Finished difference Result 1381 states and 4019 transitions. [2021-06-05 04:46:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:46:56,275 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 04:46:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:56,276 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 04:46:56,276 INFO L226 Difference]: Without dead ends: 1147 [2021-06-05 04:46:56,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 814.1ms TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:46:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-06-05 04:46:56,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 572. [2021-06-05 04:46:56,283 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 04:46:56,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1838 transitions. [2021-06-05 04:46:56,284 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1838 transitions. Word has length 21 [2021-06-05 04:46:56,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:56,284 INFO L482 AbstractCegarLoop]: Abstraction has 572 states and 1838 transitions. [2021-06-05 04:46:56,284 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 04:46:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1838 transitions. [2021-06-05 04:46:56,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:56,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:56,285 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 04:46:56,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5646 [2021-06-05 04:46:56,497 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:56,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:56,497 INFO L82 PathProgramCache]: Analyzing trace with hash -171190457, now seen corresponding path program 15 times [2021-06-05 04:46:56,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:56,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686210817] [2021-06-05 04:46:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:56,578 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 04:46:56,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:56,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686210817] [2021-06-05 04:46:56,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686210817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:56,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476000025] [2021-06-05 04:46:56,578 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 04:46:56,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:46:56,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:56,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:46:56,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:56,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:56,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:56,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:56,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:56,815 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 13 treesize of output 9 [2021-06-05 04:46:56,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:56,817 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 12 treesize of output 8 [2021-06-05 04:46:56,818 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:56,846 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.6 percent of original size [2021-06-05 04:46:56,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:46:56,847 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:84, output treesize:41 [2021-06-05 04:46:56,913 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 04:46:56,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476000025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:56,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:56,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-06-05 04:46:56,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159386013] [2021-06-05 04:46:56,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:46:56,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:56,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:46:56,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:46:56,914 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 04:46:57,516 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 04:46:57,813 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 04:46:58,184 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 04:46:58,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:46:58,616 INFO L93 Difference]: Finished difference Result 1101 states and 3236 transitions. [2021-06-05 04:46:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:46:58,616 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 04:46:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:46:58,617 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 04:46:58,617 INFO L226 Difference]: Without dead ends: 897 [2021-06-05 04:46:58,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1595.3ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:46:58,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-05 04:46:58,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 575. [2021-06-05 04:46:58,624 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 04:46:58,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1851 transitions. [2021-06-05 04:46:58,625 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1851 transitions. Word has length 21 [2021-06-05 04:46:58,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:46:58,625 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1851 transitions. [2021-06-05 04:46:58,625 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 04:46:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1851 transitions. [2021-06-05 04:46:58,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:46:58,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:46:58,626 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 04:46:58,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5653,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:46:58,826 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:46:58,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:46:58,826 INFO L82 PathProgramCache]: Analyzing trace with hash 586681167, now seen corresponding path program 16 times [2021-06-05 04:46:58,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:46:58,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977014443] [2021-06-05 04:46:58,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:46:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:46:58,920 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 04:46:58,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:46:58,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977014443] [2021-06-05 04:46:58,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977014443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:58,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896708785] [2021-06-05 04:46:58,920 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 04:46:59,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:46:59,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:46:59,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:46:59,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:46:59,096 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 13 treesize of output 9 [2021-06-05 04:46:59,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:59,100 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 04:46:59,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:59,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:59,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:59,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:59,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:59,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:59,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:59,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:46:59,111 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:59,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:46:59,113 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:46:59,149 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 04:46:59,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:46:59,150 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 04:46:59,219 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 04:46:59,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896708785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:46:59,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:46:59,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:46:59,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814027839] [2021-06-05 04:46:59,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:46:59,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:46:59,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:46:59,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:46:59,220 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 04:47:00,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:00,960 INFO L93 Difference]: Finished difference Result 1407 states and 4127 transitions. [2021-06-05 04:47:00,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:47:00,960 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 04:47:00,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:00,961 INFO L225 Difference]: With dead ends: 1407 [2021-06-05 04:47:00,962 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 04:47:00,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1271.9ms TimeCoverageRelationStatistics Valid=274, Invalid=1618, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:47:00,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 04:47:00,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 569. [2021-06-05 04:47:00,969 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 04:47:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1840 transitions. [2021-06-05 04:47:00,970 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1840 transitions. Word has length 21 [2021-06-05 04:47:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:00,970 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1840 transitions. [2021-06-05 04:47:00,970 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 04:47:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1840 transitions. [2021-06-05 04:47:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:00,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:00,970 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 04:47:01,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5665,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:01,171 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:01,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2080518403, now seen corresponding path program 17 times [2021-06-05 04:47:01,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:01,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863477011] [2021-06-05 04:47:01,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:01,261 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 04:47:01,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:01,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863477011] [2021-06-05 04:47:01,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863477011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:01,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773265668] [2021-06-05 04:47:01,261 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 04:47:01,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:01,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:01,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:47:01,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:01,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:01,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:01,454 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 04:47:01,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:01,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:01,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:01,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:01,459 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:01,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:01,462 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:01,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:01,465 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:01,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:01,467 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:01,503 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 04:47:01,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:47:01,504 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 04:47:01,577 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 04:47:01,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773265668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:01,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:01,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:47:01,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992918201] [2021-06-05 04:47:01,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:01,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:01,578 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 04:47:03,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:03,421 INFO L93 Difference]: Finished difference Result 1420 states and 4101 transitions. [2021-06-05 04:47:03,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:47:03,421 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 04:47:03,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:03,423 INFO L225 Difference]: With dead ends: 1420 [2021-06-05 04:47:03,423 INFO L226 Difference]: Without dead ends: 1201 [2021-06-05 04:47:03,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1393.7ms TimeCoverageRelationStatistics Valid=299, Invalid=1957, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:47:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-06-05 04:47:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 569. [2021-06-05 04:47:03,430 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 04:47:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1833 transitions. [2021-06-05 04:47:03,431 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1833 transitions. Word has length 21 [2021-06-05 04:47:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:03,431 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1833 transitions. [2021-06-05 04:47:03,432 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 04:47:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1833 transitions. [2021-06-05 04:47:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:03,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:03,432 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:47:03,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5674 [2021-06-05 04:47:03,633 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:03,633 INFO L82 PathProgramCache]: Analyzing trace with hash 736646205, now seen corresponding path program 18 times [2021-06-05 04:47:03,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:03,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414365133] [2021-06-05 04:47:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:03,729 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 04:47:03,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:03,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414365133] [2021-06-05 04:47:03,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414365133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:03,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147286843] [2021-06-05 04:47:03,730 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 04:47:03,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:03,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:03,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:47:03,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:03,958 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 04:47:03,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147286843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:03,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:03,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:47:03,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879205010] [2021-06-05 04:47:03,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:03,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:03,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:03,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:03,958 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 04:47:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:05,755 INFO L93 Difference]: Finished difference Result 1407 states and 4062 transitions. [2021-06-05 04:47:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 04:47:05,755 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 04:47:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:05,757 INFO L225 Difference]: With dead ends: 1407 [2021-06-05 04:47:05,757 INFO L226 Difference]: Without dead ends: 1151 [2021-06-05 04:47:05,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1279.2ms TimeCoverageRelationStatistics Valid=350, Invalid=2406, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 04:47:05,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-06-05 04:47:05,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 547. [2021-06-05 04:47:05,764 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 04:47:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 1744 transitions. [2021-06-05 04:47:05,765 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 1744 transitions. Word has length 21 [2021-06-05 04:47:05,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:05,765 INFO L482 AbstractCegarLoop]: Abstraction has 547 states and 1744 transitions. [2021-06-05 04:47:05,765 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 04:47:05,765 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 1744 transitions. [2021-06-05 04:47:05,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:05,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:05,765 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 04:47:05,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5683,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:05,966 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:05,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:05,966 INFO L82 PathProgramCache]: Analyzing trace with hash 648620313, now seen corresponding path program 19 times [2021-06-05 04:47:05,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:05,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644595332] [2021-06-05 04:47:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:06,053 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 04:47:06,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:06,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644595332] [2021-06-05 04:47:06,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644595332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:06,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461408347] [2021-06-05 04:47:06,053 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 04:47:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:06,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:47:06,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:06,255 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 12 treesize of output 8 [2021-06-05 04:47:06,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:06,257 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 5 treesize of output 3 [2021-06-05 04:47:06,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:06,260 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 12 treesize of output 8 [2021-06-05 04:47:06,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:06,263 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 04:47:06,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:06,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:06,266 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:06,299 INFO L628 ElimStorePlain]: treesize reduction 3, result has 93.0 percent of original size [2021-06-05 04:47:06,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:47:06,300 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:93, output treesize:40 [2021-06-05 04:47:06,370 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 04:47:06,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461408347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:06,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:06,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:47:06,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656097280] [2021-06-05 04:47:06,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:06,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:06,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:06,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:06,371 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 04:47:09,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:09,190 INFO L93 Difference]: Finished difference Result 1838 states and 5319 transitions. [2021-06-05 04:47:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 04:47:09,190 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 04:47:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:09,192 INFO L225 Difference]: With dead ends: 1838 [2021-06-05 04:47:09,192 INFO L226 Difference]: Without dead ends: 1526 [2021-06-05 04:47:09,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 2316.6ms TimeCoverageRelationStatistics Valid=485, Invalid=2595, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 04:47:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-06-05 04:47:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 589. [2021-06-05 04:47:09,201 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 04:47:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1906 transitions. [2021-06-05 04:47:09,202 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1906 transitions. Word has length 21 [2021-06-05 04:47:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:09,202 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1906 transitions. [2021-06-05 04:47:09,202 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 04:47:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1906 transitions. [2021-06-05 04:47:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:09,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:09,203 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 04:47:09,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5687,617 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:09,403 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:09,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1068180589, now seen corresponding path program 20 times [2021-06-05 04:47:09,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:09,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025609906] [2021-06-05 04:47:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:09,498 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 04:47:09,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:09,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025609906] [2021-06-05 04:47:09,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025609906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:09,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604002982] [2021-06-05 04:47:09,498 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 04:47:09,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:09,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:09,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:47:09,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:09,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:09,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:09,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:09,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:09,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:09,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:09,709 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 5 treesize of output 3 [2021-06-05 04:47:09,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:09,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:09,713 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:09,715 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 13 treesize of output 9 [2021-06-05 04:47:09,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:09,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:09,718 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:09,755 INFO L628 ElimStorePlain]: treesize reduction 14, result has 74.1 percent of original size [2021-06-05 04:47:09,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 04:47:09,756 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:140, output treesize:40 [2021-06-05 04:47:09,833 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 04:47:09,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604002982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:09,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:09,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:47:09,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940751383] [2021-06-05 04:47:09,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:09,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:09,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:09,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:09,834 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 04:47:10,876 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-06-05 04:47:11,080 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 04:47:11,417 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 04:47:11,585 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 04:47:12,109 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-06-05 04:47:12,263 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 04:47:12,482 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 04:47:13,761 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-05 04:47:13,939 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-05 04:47:14,081 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 04:47:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:14,094 INFO L93 Difference]: Finished difference Result 1916 states and 5539 transitions. [2021-06-05 04:47:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 04:47:14,094 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 04:47:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:14,096 INFO L225 Difference]: With dead ends: 1916 [2021-06-05 04:47:14,096 INFO L226 Difference]: Without dead ends: 1653 [2021-06-05 04:47:14,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 3747.8ms TimeCoverageRelationStatistics Valid=680, Invalid=3352, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 04:47:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-06-05 04:47:14,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 583. [2021-06-05 04:47:14,105 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 04:47:14,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1885 transitions. [2021-06-05 04:47:14,106 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1885 transitions. Word has length 21 [2021-06-05 04:47:14,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:14,106 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1885 transitions. [2021-06-05 04:47:14,106 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 04:47:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1885 transitions. [2021-06-05 04:47:14,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:14,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:14,106 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 04:47:14,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5698,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:14,307 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:14,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:14,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1985017005, now seen corresponding path program 21 times [2021-06-05 04:47:14,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:14,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664780777] [2021-06-05 04:47:14,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:14,406 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 04:47:14,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:14,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664780777] [2021-06-05 04:47:14,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664780777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:14,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810021195] [2021-06-05 04:47:14,406 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 04:47:14,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:47:14,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:14,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:47:14,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:14,667 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 04:47:14,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810021195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:14,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:14,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:47:14,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073969364] [2021-06-05 04:47:14,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:14,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:14,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:14,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:14,667 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 04:47:15,617 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 04:47:17,014 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-05 04:47:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:17,128 INFO L93 Difference]: Finished difference Result 1743 states and 5017 transitions. [2021-06-05 04:47:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:47:17,129 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 04:47:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:17,130 INFO L225 Difference]: With dead ends: 1743 [2021-06-05 04:47:17,131 INFO L226 Difference]: Without dead ends: 1466 [2021-06-05 04:47:17,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1976.7ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 04:47:17,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2021-06-05 04:47:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 573. [2021-06-05 04:47:17,139 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 04:47:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1843 transitions. [2021-06-05 04:47:17,140 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1843 transitions. Word has length 21 [2021-06-05 04:47:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:17,140 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1843 transitions. [2021-06-05 04:47:17,140 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 04:47:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1843 transitions. [2021-06-05 04:47:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:17,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:17,141 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 04:47:17,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5711 [2021-06-05 04:47:17,341 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:17,341 INFO L82 PathProgramCache]: Analyzing trace with hash -792723440, now seen corresponding path program 596 times [2021-06-05 04:47:17,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:17,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085850512] [2021-06-05 04:47:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:17,433 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 04:47:17,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:17,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085850512] [2021-06-05 04:47:17,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085850512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:17,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999294273] [2021-06-05 04:47:17,433 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 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 04:47:17,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:17,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:17,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:47:17,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:17,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:17,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:17,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:17,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:17,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:17,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:17,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:17,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:17,883 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:17,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:17,887 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 19 treesize of output 9 [2021-06-05 04:47:17,887 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,890 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:17,890 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,893 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 5 treesize of output 3 [2021-06-05 04:47:17,893 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,896 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 13 treesize of output 9 [2021-06-05 04:47:17,896 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:17,968 INFO L628 ElimStorePlain]: treesize reduction 53, result has 63.7 percent of original size [2021-06-05 04:47:17,969 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 04:47:17,970 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:295, output treesize:49 [2021-06-05 04:47:18,047 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 04:47:18,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999294273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:18,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:18,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:18,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211170142] [2021-06-05 04:47:18,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:18,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:18,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:18,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:18,048 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 04:47:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:18,723 INFO L93 Difference]: Finished difference Result 796 states and 2524 transitions. [2021-06-05 04:47:18,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:47:18,723 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 04:47:18,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:18,724 INFO L225 Difference]: With dead ends: 796 [2021-06-05 04:47:18,724 INFO L226 Difference]: Without dead ends: 749 [2021-06-05 04:47:18,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 591.6ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:18,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-05 04:47:18,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 612. [2021-06-05 04:47:18,730 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 04:47:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1982 transitions. [2021-06-05 04:47:18,731 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1982 transitions. Word has length 21 [2021-06-05 04:47:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:18,731 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1982 transitions. [2021-06-05 04:47:18,731 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 04:47:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1982 transitions. [2021-06-05 04:47:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:18,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:18,732 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 04:47:18,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5717,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:18,932 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash -251408250, now seen corresponding path program 597 times [2021-06-05 04:47:18,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:18,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471762547] [2021-06-05 04:47:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:19,037 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 04:47:19,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:19,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471762547] [2021-06-05 04:47:19,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471762547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:19,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457344292] [2021-06-05 04:47:19,037 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 04:47:19,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:47:19,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:19,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:47:19,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:19,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:19,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:19,536 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 18 treesize of output 8 [2021-06-05 04:47:19,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:19,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:19,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:19,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:19,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:19,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:19,545 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:19,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:19,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:19,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:19,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:19,551 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 5 treesize of output 3 [2021-06-05 04:47:19,552 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:19,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:19,555 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:19,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:19,558 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:19,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:19,561 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:19,631 INFO L628 ElimStorePlain]: treesize reduction 24, result has 79.5 percent of original size [2021-06-05 04:47:19,633 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 04:47:19,633 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:291, output treesize:49 [2021-06-05 04:47:19,717 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 04:47:19,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457344292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:19,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:19,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:19,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145369568] [2021-06-05 04:47:19,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:19,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:19,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:19,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:19,718 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 04:47:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:20,422 INFO L93 Difference]: Finished difference Result 836 states and 2636 transitions. [2021-06-05 04:47:20,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:20,422 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 04:47:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:20,423 INFO L225 Difference]: With dead ends: 836 [2021-06-05 04:47:20,424 INFO L226 Difference]: Without dead ends: 789 [2021-06-05 04:47:20,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 649.7ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-06-05 04:47:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 619. [2021-06-05 04:47:20,429 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 04:47:20,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2011 transitions. [2021-06-05 04:47:20,430 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2011 transitions. Word has length 21 [2021-06-05 04:47:20,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:20,430 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 2011 transitions. [2021-06-05 04:47:20,430 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 04:47:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2011 transitions. [2021-06-05 04:47:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:20,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:20,431 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 04:47:20,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 621 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5760 [2021-06-05 04:47:20,632 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1567168848, now seen corresponding path program 598 times [2021-06-05 04:47:20,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:20,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104251122] [2021-06-05 04:47:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:20,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:20,743 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 04:47:20,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:20,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104251122] [2021-06-05 04:47:20,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104251122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:20,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610674961] [2021-06-05 04:47:20,743 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 04:47:20,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:20,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:20,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:20,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:21,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:21,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:21,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:21,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:21,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:21,268 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:21,273 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:21,277 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:21,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:21,282 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:21,285 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:21,396 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-05 04:47:21,396 INFO L628 ElimStorePlain]: treesize reduction 34, result has 80.1 percent of original size [2021-06-05 04:47:21,400 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 04:47:21,400 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-06-05 04:47:21,603 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 04:47:21,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610674961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:21,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:21,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 04:47:21,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804744744] [2021-06-05 04:47:21,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:21,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:21,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:21,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:21,604 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 04:47:22,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:22,711 INFO L93 Difference]: Finished difference Result 840 states and 2630 transitions. [2021-06-05 04:47:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:22,712 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 04:47:22,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:22,713 INFO L225 Difference]: With dead ends: 840 [2021-06-05 04:47:22,713 INFO L226 Difference]: Without dead ends: 771 [2021-06-05 04:47:22,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1129.9ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:47:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-06-05 04:47:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 605. [2021-06-05 04:47:22,718 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 04:47:22,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1953 transitions. [2021-06-05 04:47:22,719 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1953 transitions. Word has length 21 [2021-06-05 04:47:22,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:22,719 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1953 transitions. [2021-06-05 04:47:22,719 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 04:47:22,719 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1953 transitions. [2021-06-05 04:47:22,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:22,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:22,720 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 04:47:22,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5804,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:22,920 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:22,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:22,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1224209328, now seen corresponding path program 599 times [2021-06-05 04:47:22,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:22,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595153588] [2021-06-05 04:47:22,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:23,057 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 04:47:23,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:23,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595153588] [2021-06-05 04:47:23,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595153588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:23,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013611356] [2021-06-05 04:47:23,057 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 04:47:23,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:23,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:23,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:47:23,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:23,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:23,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:23,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:23,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:23,434 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 19 treesize of output 9 [2021-06-05 04:47:23,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:23,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:23,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:23,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:23,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:23,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:23,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:23,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:23,445 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:23,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:23,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:23,448 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:23,510 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-06-05 04:47:23,511 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 04:47:23,512 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:204, output treesize:43 [2021-06-05 04:47:23,579 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 04:47:23,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013611356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:23,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:23,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:47:23,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571028154] [2021-06-05 04:47:23,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:47:23,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:23,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:47:23,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:47:23,580 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 04:47:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:24,005 INFO L93 Difference]: Finished difference Result 805 states and 2540 transitions. [2021-06-05 04:47:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:47:24,005 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 04:47:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:24,006 INFO L225 Difference]: With dead ends: 805 [2021-06-05 04:47:24,007 INFO L226 Difference]: Without dead ends: 758 [2021-06-05 04:47:24,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 411.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:24,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-06-05 04:47:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 626. [2021-06-05 04:47:24,012 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 04:47:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 2035 transitions. [2021-06-05 04:47:24,013 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 2035 transitions. Word has length 21 [2021-06-05 04:47:24,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:24,013 INFO L482 AbstractCegarLoop]: Abstraction has 626 states and 2035 transitions. [2021-06-05 04:47:24,013 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 04:47:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 2035 transitions. [2021-06-05 04:47:24,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:24,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:24,014 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 04:47:24,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5876,623 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:24,215 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:24,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:24,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1252180870, now seen corresponding path program 600 times [2021-06-05 04:47:24,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:24,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824806068] [2021-06-05 04:47:24,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:24,330 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 04:47:24,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:24,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824806068] [2021-06-05 04:47:24,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824806068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:24,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605936721] [2021-06-05 04:47:24,330 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 04:47:24,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:24,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:24,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:47:24,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:24,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:24,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,920 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 25 treesize of output 13 [2021-06-05 04:47:24,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:24,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:24,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:24,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,941 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 17 treesize of output 8 [2021-06-05 04:47:24,942 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,946 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 24 treesize of output 1 [2021-06-05 04:47:24,947 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:24,952 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,956 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 24 treesize of output 12 [2021-06-05 04:47:24,957 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:24,962 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,966 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 18 treesize of output 12 [2021-06-05 04:47:24,967 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:24,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:24,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:24,971 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:25,133 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 04:47:25,133 INFO L628 ElimStorePlain]: treesize reduction 75, result has 71.5 percent of original size [2021-06-05 04:47:25,136 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 04:47:25,136 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:640, output treesize:108 [2021-06-05 04:47:25,320 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 04:47:25,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605936721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:25,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:25,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:47:25,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371630847] [2021-06-05 04:47:25,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:47:25,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:25,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:47:25,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:47:25,320 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 04:47:25,717 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-05 04:47:25,862 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 04:47:26,007 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 04:47:26,143 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 04:47:26,282 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 04:47:26,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:26,338 INFO L93 Difference]: Finished difference Result 872 states and 2702 transitions. [2021-06-05 04:47:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:26,339 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 04:47:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:26,340 INFO L225 Difference]: With dead ends: 872 [2021-06-05 04:47:26,340 INFO L226 Difference]: Without dead ends: 778 [2021-06-05 04:47:26,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1048.5ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:26,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-06-05 04:47:26,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 619. [2021-06-05 04:47:26,346 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 04:47:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 2006 transitions. [2021-06-05 04:47:26,347 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 2006 transitions. Word has length 21 [2021-06-05 04:47:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:26,347 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 2006 transitions. [2021-06-05 04:47:26,347 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 04:47:26,347 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 2006 transitions. [2021-06-05 04:47:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:26,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:26,347 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 04:47:26,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5917 [2021-06-05 04:47:26,548 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:26,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:26,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1982008336, now seen corresponding path program 601 times [2021-06-05 04:47:26,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:26,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066024027] [2021-06-05 04:47:26,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:26,663 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 04:47:26,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:26,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066024027] [2021-06-05 04:47:26,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066024027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:26,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300037397] [2021-06-05 04:47:26,663 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 04:47:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:26,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:47:26,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:27,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:27,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:27,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:27,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:27,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:27,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:27,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:27,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:27,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:27,012 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 11 treesize of output 7 [2021-06-05 04:47:27,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:27,159 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 04:47:27,159 INFO L628 ElimStorePlain]: treesize reduction 114, result has 61.7 percent of original size [2021-06-05 04:47:27,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:27,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:27,163 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 19 treesize of output 13 [2021-06-05 04:47:27,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:27,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:27,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:27,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:27,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:27,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:27,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:27,218 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:27,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:27,222 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:27,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:27,268 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 04:47:27,268 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-06-05 04:47:27,416 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 04:47:27,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300037397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:27,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:27,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:47:27,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357857683] [2021-06-05 04:47:27,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:47:27,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:27,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:47:27,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:47:27,417 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 04:47:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:27,998 INFO L93 Difference]: Finished difference Result 957 states and 2965 transitions. [2021-06-05 04:47:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:47:27,999 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 04:47:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:28,000 INFO L225 Difference]: With dead ends: 957 [2021-06-05 04:47:28,000 INFO L226 Difference]: Without dead ends: 910 [2021-06-05 04:47:28,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:28,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-06-05 04:47:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 633. [2021-06-05 04:47:28,006 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 04:47:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 2075 transitions. [2021-06-05 04:47:28,007 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 2075 transitions. Word has length 21 [2021-06-05 04:47:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:28,008 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 2075 transitions. [2021-06-05 04:47:28,008 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 04:47:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 2075 transitions. [2021-06-05 04:47:28,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:28,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:28,008 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 04:47:28,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6034 [2021-06-05 04:47:28,209 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:28,209 INFO L82 PathProgramCache]: Analyzing trace with hash -893071312, now seen corresponding path program 602 times [2021-06-05 04:47:28,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:28,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381982681] [2021-06-05 04:47:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:28,330 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 04:47:28,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:28,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381982681] [2021-06-05 04:47:28,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381982681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:28,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550275926] [2021-06-05 04:47:28,331 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 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 04:47:28,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:28,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:28,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:28,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:28,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,894 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 18 treesize of output 1 [2021-06-05 04:47:28,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,898 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 24 treesize of output 1 [2021-06-05 04:47:28,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:28,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,906 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 12 treesize of output 8 [2021-06-05 04:47:28,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:28,910 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:28,915 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:28,918 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:28,933 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,937 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 12 [2021-06-05 04:47:28,937 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:28,941 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:28,945 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:28,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:28,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:28,948 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:29,044 INFO L628 ElimStorePlain]: treesize reduction 29, result has 82.0 percent of original size [2021-06-05 04:47:29,049 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 04:47:29,049 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-06-05 04:47:29,199 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 04:47:29,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550275926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:29,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:29,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 04:47:29,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767962948] [2021-06-05 04:47:29,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:29,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:29,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:29,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:29,200 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 04:47:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:30,068 INFO L93 Difference]: Finished difference Result 925 states and 2856 transitions. [2021-06-05 04:47:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:30,069 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 04:47:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:30,070 INFO L225 Difference]: With dead ends: 925 [2021-06-05 04:47:30,070 INFO L226 Difference]: Without dead ends: 856 [2021-06-05 04:47:30,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 806.0ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:47:30,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-06-05 04:47:30,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 587. [2021-06-05 04:47:30,076 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 04:47:30,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1888 transitions. [2021-06-05 04:47:30,076 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1888 transitions. Word has length 21 [2021-06-05 04:47:30,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:30,077 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1888 transitions. [2021-06-05 04:47:30,077 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 04:47:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1888 transitions. [2021-06-05 04:47:30,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:30,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:30,077 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 04:47:30,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6081 [2021-06-05 04:47:30,278 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:30,278 INFO L82 PathProgramCache]: Analyzing trace with hash -276286010, now seen corresponding path program 603 times [2021-06-05 04:47:30,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:30,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118376738] [2021-06-05 04:47:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:30,400 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 04:47:30,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:30,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118376738] [2021-06-05 04:47:30,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118376738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:30,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373188757] [2021-06-05 04:47:30,400 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 04:47:30,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:47:30,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:30,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:47:30,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:30,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:30,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,822 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 04:47:30,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:30,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,830 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 12 treesize of output 1 [2021-06-05 04:47:30,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:30,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:30,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:30,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:30,902 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.8 percent of original size [2021-06-05 04:47:30,904 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 04:47:30,904 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:204, output treesize:43 [2021-06-05 04:47:30,974 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 04:47:30,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373188757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:30,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:30,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:47:30,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717917343] [2021-06-05 04:47:30,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:47:30,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:30,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:47:30,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:47:30,975 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 04:47:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:31,393 INFO L93 Difference]: Finished difference Result 758 states and 2401 transitions. [2021-06-05 04:47:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:47:31,393 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 04:47:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:31,394 INFO L225 Difference]: With dead ends: 758 [2021-06-05 04:47:31,394 INFO L226 Difference]: Without dead ends: 711 [2021-06-05 04:47:31,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-06-05 04:47:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 612. [2021-06-05 04:47:31,399 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 04:47:31,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1978 transitions. [2021-06-05 04:47:31,400 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1978 transitions. Word has length 21 [2021-06-05 04:47:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:31,400 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 1978 transitions. [2021-06-05 04:47:31,401 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 04:47:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1978 transitions. [2021-06-05 04:47:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:31,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:31,401 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 04:47:31,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6183,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:31,602 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:31,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:31,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1542291088, now seen corresponding path program 604 times [2021-06-05 04:47:31,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:31,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232286498] [2021-06-05 04:47:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:31,719 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 04:47:31,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:31,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232286498] [2021-06-05 04:47:31,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232286498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:31,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173922059] [2021-06-05 04:47:31,720 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 04:47:31,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:31,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:31,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:31,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:32,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,263 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 24 treesize of output 1 [2021-06-05 04:47:32,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,268 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 23 treesize of output 1 [2021-06-05 04:47:32,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:32,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,278 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 18 treesize of output 1 [2021-06-05 04:47:32,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,283 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 12 treesize of output 8 [2021-06-05 04:47:32,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,288 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 24 treesize of output 12 [2021-06-05 04:47:32,289 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:32,294 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,299 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 17 treesize of output 8 [2021-06-05 04:47:32,299 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,304 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 18 treesize of output 12 [2021-06-05 04:47:32,304 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,309 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 19 treesize of output 13 [2021-06-05 04:47:32,310 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,314 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 11 treesize of output 7 [2021-06-05 04:47:32,315 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:32,319 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 25 treesize of output 13 [2021-06-05 04:47:32,320 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:32,439 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-05 04:47:32,439 INFO L628 ElimStorePlain]: treesize reduction 155, result has 46.9 percent of original size [2021-06-05 04:47:32,441 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 04:47:32,441 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:604, output treesize:73 [2021-06-05 04:47:32,642 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 04:47:32,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173922059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:32,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:32,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 04:47:32,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65594285] [2021-06-05 04:47:32,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:32,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:32,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:32,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:32,643 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 04:47:33,520 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 04:47:33,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:33,710 INFO L93 Difference]: Finished difference Result 809 states and 2536 transitions. [2021-06-05 04:47:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:47:33,711 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 04:47:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:33,712 INFO L225 Difference]: With dead ends: 809 [2021-06-05 04:47:33,712 INFO L226 Difference]: Without dead ends: 740 [2021-06-05 04:47:33,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1062.1ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:47:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-06-05 04:47:33,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 605. [2021-06-05 04:47:33,717 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 04:47:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1949 transitions. [2021-06-05 04:47:33,718 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1949 transitions. Word has length 21 [2021-06-05 04:47:33,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:33,718 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1949 transitions. [2021-06-05 04:47:33,718 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 04:47:33,718 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1949 transitions. [2021-06-05 04:47:33,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:33,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:33,719 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 04:47:33,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6226,628 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:33,920 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash 481512998, now seen corresponding path program 605 times [2021-06-05 04:47:33,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:33,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3972376] [2021-06-05 04:47:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:34,040 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 04:47:34,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:34,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3972376] [2021-06-05 04:47:34,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3972376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:34,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899235870] [2021-06-05 04:47:34,041 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 04:47:34,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:34,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:34,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:47:34,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:34,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:34,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:34,406 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 11 treesize of output 7 [2021-06-05 04:47:34,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:34,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:34,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:34,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:34,415 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 12 treesize of output 8 [2021-06-05 04:47:34,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,563 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 04:47:34,563 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-06-05 04:47:34,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:34,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:34,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:34,568 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:34,571 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:34,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:34,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:34,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:34,623 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:34,626 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:34,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:34,671 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 04:47:34,671 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-06-05 04:47:34,816 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 04:47:34,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899235870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:34,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:34,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:47:34,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366539862] [2021-06-05 04:47:34,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:47:34,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:34,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:47:34,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:47:34,817 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 04:47:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:35,354 INFO L93 Difference]: Finished difference Result 890 states and 2751 transitions. [2021-06-05 04:47:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:47:35,355 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 04:47:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:35,356 INFO L225 Difference]: With dead ends: 890 [2021-06-05 04:47:35,356 INFO L226 Difference]: Without dead ends: 843 [2021-06-05 04:47:35,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 594.7ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:47:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-06-05 04:47:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 614. [2021-06-05 04:47:35,362 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 04:47:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1992 transitions. [2021-06-05 04:47:35,363 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1992 transitions. Word has length 21 [2021-06-05 04:47:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:35,363 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1992 transitions. [2021-06-05 04:47:35,363 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 04:47:35,363 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1992 transitions. [2021-06-05 04:47:35,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:35,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:35,364 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 04:47:35,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 629 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6298 [2021-06-05 04:47:35,579 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:35,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:35,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1901400646, now seen corresponding path program 606 times [2021-06-05 04:47:35,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:35,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828928775] [2021-06-05 04:47:35,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:35,706 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 04:47:35,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:35,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828928775] [2021-06-05 04:47:35,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828928775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:35,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083520254] [2021-06-05 04:47:35,707 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 04:47:35,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:47:35,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:35,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:35,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:36,148 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_180, v_prenex_178], 1=[v_prenex_179, nondet_0]} [2021-06-05 04:47:36,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:36,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:36,268 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-06-05 04:47:36,269 INFO L628 ElimStorePlain]: treesize reduction 279, result has 33.1 percent of original size [2021-06-05 04:47:36,272 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 13 treesize of output 9 [2021-06-05 04:47:36,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:36,356 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.2 percent of original size [2021-06-05 04:47:36,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:36,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:36,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:36,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:36,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:36,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:36,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:36,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:36,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:36,408 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 19 treesize of output 13 [2021-06-05 04:47:36,408 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:36,475 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 04:47:36,477 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 04:47:36,477 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-06-05 04:47:36,625 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 04:47:36,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083520254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:36,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:36,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 04:47:36,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482501823] [2021-06-05 04:47:36,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:36,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:36,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:36,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:36,625 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 04:47:37,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:37,418 INFO L93 Difference]: Finished difference Result 858 states and 2642 transitions. [2021-06-05 04:47:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:37,419 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 04:47:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:37,420 INFO L225 Difference]: With dead ends: 858 [2021-06-05 04:47:37,420 INFO L226 Difference]: Without dead ends: 789 [2021-06-05 04:47:37,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 781.8ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:47:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2021-06-05 04:47:37,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 602. [2021-06-05 04:47:37,425 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 04:47:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1944 transitions. [2021-06-05 04:47:37,426 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1944 transitions. Word has length 21 [2021-06-05 04:47:37,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:37,426 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1944 transitions. [2021-06-05 04:47:37,426 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 04:47:37,426 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1944 transitions. [2021-06-05 04:47:37,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:37,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:37,427 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 04:47:37,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6336,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:37,628 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:37,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1957130576, now seen corresponding path program 607 times [2021-06-05 04:47:37,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:37,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697524163] [2021-06-05 04:47:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:37,734 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 04:47:37,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:37,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697524163] [2021-06-05 04:47:37,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697524163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:37,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716424363] [2021-06-05 04:47:37,734 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 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 04:47:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:37,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:47:37,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:38,001 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-06-05 04:47:38,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:38,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:38,258 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 11 treesize of output 7 [2021-06-05 04:47:38,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:38,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:38,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:38,263 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 18 treesize of output 1 [2021-06-05 04:47:38,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:38,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:38,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:38,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:38,447 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2021-06-05 04:47:38,447 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-06-05 04:47:38,450 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 12 treesize of output 8 [2021-06-05 04:47:38,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:38,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:38,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:38,455 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:38,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:38,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:38,522 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:38,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:38,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:38,526 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:38,615 INFO L628 ElimStorePlain]: treesize reduction 24, result has 82.7 percent of original size [2021-06-05 04:47:38,616 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 04:47:38,617 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-06-05 04:47:38,772 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 04:47:38,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716424363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:38,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:38,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:38,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25799325] [2021-06-05 04:47:38,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:38,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:38,773 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 04:47:38,991 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 04:47:39,539 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-06-05 04:47:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:39,704 INFO L93 Difference]: Finished difference Result 941 states and 2880 transitions. [2021-06-05 04:47:39,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:39,704 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 04:47:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:39,705 INFO L225 Difference]: With dead ends: 941 [2021-06-05 04:47:39,705 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 04:47:39,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 997.9ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:47:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 04:47:39,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 620. [2021-06-05 04:47:39,711 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 04:47:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2023 transitions. [2021-06-05 04:47:39,712 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2023 transitions. Word has length 21 [2021-06-05 04:47:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:39,713 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 2023 transitions. [2021-06-05 04:47:39,713 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 04:47:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2023 transitions. [2021-06-05 04:47:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:39,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:39,713 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 04:47:39,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6392 [2021-06-05 04:47:39,914 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:39,914 INFO L82 PathProgramCache]: Analyzing trace with hash -917949072, now seen corresponding path program 608 times [2021-06-05 04:47:39,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:39,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333325141] [2021-06-05 04:47:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:40,019 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 04:47:40,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:40,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333325141] [2021-06-05 04:47:40,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333325141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:40,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146497406] [2021-06-05 04:47:40,019 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 04:47:40,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:40,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:40,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:40,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:40,498 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_187, v_prenex_189], 1=[v_prenex_188, nondet_0]} [2021-06-05 04:47:40,502 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 13 treesize of output 9 [2021-06-05 04:47:40,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:40,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,509 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 12 treesize of output 8 [2021-06-05 04:47:40,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,636 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-05 04:47:40,636 INFO L628 ElimStorePlain]: treesize reduction 221, result has 39.8 percent of original size [2021-06-05 04:47:40,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:40,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,724 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-06-05 04:47:40,727 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 04:47:40,728 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:40,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,772 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 12 treesize of output 8 [2021-06-05 04:47:40,773 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:40,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:40,776 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:40,843 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 04:47:40,847 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 04:47:40,847 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-06-05 04:47:41,000 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 04:47:41,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146497406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:41,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:41,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 04:47:41,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910311092] [2021-06-05 04:47:41,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:41,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:41,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:41,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:41,001 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 04:47:41,219 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 04:47:41,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:41,977 INFO L93 Difference]: Finished difference Result 1014 states and 3030 transitions. [2021-06-05 04:47:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:41,977 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 04:47:41,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:41,978 INFO L225 Difference]: With dead ends: 1014 [2021-06-05 04:47:41,978 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 04:47:41,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 947.1ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:47:41,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 04:47:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 623. [2021-06-05 04:47:41,984 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 04:47:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2018 transitions. [2021-06-05 04:47:41,985 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2018 transitions. Word has length 21 [2021-06-05 04:47:41,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:41,986 INFO L482 AbstractCegarLoop]: Abstraction has 623 states and 2018 transitions. [2021-06-05 04:47:41,986 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 04:47:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2018 transitions. [2021-06-05 04:47:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:41,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:41,986 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 04:47:42,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6459,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:42,187 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1051616592, now seen corresponding path program 609 times [2021-06-05 04:47:42,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:42,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550701378] [2021-06-05 04:47:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:42,277 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 04:47:42,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550701378] [2021-06-05 04:47:42,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550701378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484175094] [2021-06-05 04:47:42,277 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 04:47:42,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:47:42,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:42,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:47:42,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:42,671 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_193, v_prenex_194], 1=[nondet_0]} [2021-06-05 04:47:42,674 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 04:47:42,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:42,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,715 INFO L628 ElimStorePlain]: treesize reduction 107, result has 28.7 percent of original size [2021-06-05 04:47:42,715 INFO L518 ElimStorePlain]: Eliminatee v_prenex_194 vanished before elimination [2021-06-05 04:47:42,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:42,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:42,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:42,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:42,730 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 04:47:42,730 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:168, output treesize:30 [2021-06-05 04:47:42,785 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 04:47:42,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484175094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:42,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:42,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:42,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893146866] [2021-06-05 04:47:42,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:42,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:42,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:42,786 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 04:47:43,006 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-05 04:47:43,201 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-05 04:47:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:43,435 INFO L93 Difference]: Finished difference Result 782 states and 2402 transitions. [2021-06-05 04:47:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:47:43,435 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 04:47:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:43,436 INFO L225 Difference]: With dead ends: 782 [2021-06-05 04:47:43,436 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 04:47:43,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 637.1ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:43,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 04:47:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 629. [2021-06-05 04:47:43,442 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 04:47:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2025 transitions. [2021-06-05 04:47:43,442 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2025 transitions. Word has length 21 [2021-06-05 04:47:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:43,443 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2025 transitions. [2021-06-05 04:47:43,443 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 04:47:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2025 transitions. [2021-06-05 04:47:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:43,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:43,443 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 04:47:43,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6521 [2021-06-05 04:47:43,644 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:43,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:43,644 INFO L82 PathProgramCache]: Analyzing trace with hash 671100815, now seen corresponding path program 22 times [2021-06-05 04:47:43,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:43,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554715420] [2021-06-05 04:47:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:43,716 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 04:47:43,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:43,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554715420] [2021-06-05 04:47:43,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554715420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:43,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441500297] [2021-06-05 04:47:43,717 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 04:47:43,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:43,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:43,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 04:47:43,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:43,941 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 04:47:43,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441500297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:43,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:43,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-06-05 04:47:43,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240492615] [2021-06-05 04:47:43,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:43,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:43,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:43,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:43,942 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 04:47:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:45,365 INFO L93 Difference]: Finished difference Result 1261 states and 3687 transitions. [2021-06-05 04:47:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:47:45,365 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 04:47:45,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:45,366 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 04:47:45,366 INFO L226 Difference]: Without dead ends: 997 [2021-06-05 04:47:45,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1092.9ms TimeCoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:47:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-05 04:47:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 632. [2021-06-05 04:47:45,373 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 04:47:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2021 transitions. [2021-06-05 04:47:45,374 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2021 transitions. Word has length 21 [2021-06-05 04:47:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:45,374 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2021 transitions. [2021-06-05 04:47:45,374 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 04:47:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2021 transitions. [2021-06-05 04:47:45,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:45,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:45,375 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 04:47:45,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6556,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:45,575 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:45,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:45,576 INFO L82 PathProgramCache]: Analyzing trace with hash 989891146, now seen corresponding path program 610 times [2021-06-05 04:47:45,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:45,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313367223] [2021-06-05 04:47:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:45,655 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 04:47:45,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:45,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313367223] [2021-06-05 04:47:45,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313367223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:45,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867193837] [2021-06-05 04:47:45,655 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 04:47:45,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:45,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:45,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:45,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:45,881 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 18 treesize of output 12 [2021-06-05 04:47:45,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:45,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:45,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,889 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 04:47:45,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:45,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:45,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:45,906 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-06-05 04:47:46,042 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 04:47:46,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867193837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:46,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:46,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 04:47:46,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094563753] [2021-06-05 04:47:46,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:46,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:46,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:46,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:46,042 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 04:47:46,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:46,879 INFO L93 Difference]: Finished difference Result 968 states and 2993 transitions. [2021-06-05 04:47:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:47:46,879 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 04:47:46,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:46,880 INFO L225 Difference]: With dead ends: 968 [2021-06-05 04:47:46,880 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 04:47:46,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 725.6ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:47:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 04:47:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 651. [2021-06-05 04:47:46,887 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 04:47:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2096 transitions. [2021-06-05 04:47:46,888 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2096 transitions. Word has length 21 [2021-06-05 04:47:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:46,888 INFO L482 AbstractCegarLoop]: Abstraction has 651 states and 2096 transitions. [2021-06-05 04:47:46,888 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 04:47:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2096 transitions. [2021-06-05 04:47:46,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:46,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:46,889 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 04:47:47,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6560,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:47,089 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1531206336, now seen corresponding path program 611 times [2021-06-05 04:47:47,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:47,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325916370] [2021-06-05 04:47:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:47,186 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 04:47:47,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:47,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325916370] [2021-06-05 04:47:47,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325916370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:47,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132570299] [2021-06-05 04:47:47,187 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 04:47:47,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:47,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:47,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:47,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:47,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:47,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:47,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:47,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:47,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:47,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:47,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:47,631 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 18 treesize of output 12 [2021-06-05 04:47:47,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,691 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.7 percent of original size [2021-06-05 04:47:47,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:47,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:47,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:47,719 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 04:47:47,719 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:207, output treesize:48 [2021-06-05 04:47:47,845 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 04:47:47,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132570299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:47,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:47,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 04:47:47,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076717740] [2021-06-05 04:47:47,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:47:47,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:47,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:47:47,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:47:47,846 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 04:47:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:48,761 INFO L93 Difference]: Finished difference Result 908 states and 2840 transitions. [2021-06-05 04:47:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:47:48,762 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 04:47:48,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:48,763 INFO L225 Difference]: With dead ends: 908 [2021-06-05 04:47:48,763 INFO L226 Difference]: Without dead ends: 839 [2021-06-05 04:47:48,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 890.5ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:47:48,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-06-05 04:47:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 658. [2021-06-05 04:47:48,769 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 04:47:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2125 transitions. [2021-06-05 04:47:48,770 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2125 transitions. Word has length 21 [2021-06-05 04:47:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:48,770 INFO L482 AbstractCegarLoop]: Abstraction has 658 states and 2125 transitions. [2021-06-05 04:47:48,770 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 04:47:48,770 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2125 transitions. [2021-06-05 04:47:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:48,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:48,771 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 04:47:48,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6576 [2021-06-05 04:47:48,971 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:48,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:48,971 INFO L82 PathProgramCache]: Analyzing trace with hash -945183862, now seen corresponding path program 612 times [2021-06-05 04:47:48,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:48,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453562361] [2021-06-05 04:47:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:49,053 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 04:47:49,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:49,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453562361] [2021-06-05 04:47:49,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453562361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:49,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398452214] [2021-06-05 04:47:49,054 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 04:47:49,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:47:49,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:49,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:47:49,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:49,268 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 19 treesize of output 13 [2021-06-05 04:47:49,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:49,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:49,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:49,282 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 18 treesize of output 12 [2021-06-05 04:47:49,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:49,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:49,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:49,290 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 17 treesize of output 11 [2021-06-05 04:47:49,290 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:49,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:49,294 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:49,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:49,297 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:49,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:49,300 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:49,303 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 18 treesize of output 12 [2021-06-05 04:47:49,303 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:49,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:49,307 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:49,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:49,309 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:49,397 INFO L628 ElimStorePlain]: treesize reduction 64, result has 62.6 percent of original size [2021-06-05 04:47:49,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:47:49,399 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:401, output treesize:107 [2021-06-05 04:47:49,543 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 04:47:49,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398452214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:49,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:49,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:47:49,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752909053] [2021-06-05 04:47:49,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:47:49,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:49,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:47:49,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:47:49,543 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 04:47:49,926 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 04:47:50,068 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 04:47:50,209 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 04:47:50,369 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 04:47:50,498 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 04:47:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:50,561 INFO L93 Difference]: Finished difference Result 1121 states and 3412 transitions. [2021-06-05 04:47:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:47:50,562 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 04:47:50,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:50,563 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 04:47:50,563 INFO L226 Difference]: Without dead ends: 980 [2021-06-05 04:47:50,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 953.2ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:47:50,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-06-05 04:47:50,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 672. [2021-06-05 04:47:50,570 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 04:47:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2190 transitions. [2021-06-05 04:47:50,571 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2190 transitions. Word has length 21 [2021-06-05 04:47:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:50,571 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2190 transitions. [2021-06-05 04:47:50,571 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 04:47:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2190 transitions. [2021-06-05 04:47:50,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:50,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:50,572 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 04:47:50,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6623,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:50,772 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:50,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:50,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1288143382, now seen corresponding path program 613 times [2021-06-05 04:47:50,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:50,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447086662] [2021-06-05 04:47:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:50,895 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 04:47:50,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:50,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447086662] [2021-06-05 04:47:50,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447086662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:50,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964167009] [2021-06-05 04:47:50,895 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 04:47:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:51,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:51,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:51,154 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 18 treesize of output 12 [2021-06-05 04:47:51,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:51,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:51,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:51,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:51,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:51,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:51,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:51,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:47:51,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:47:51,179 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:101, output treesize:48 [2021-06-05 04:47:51,314 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 04:47:51,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964167009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:51,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:51,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 04:47:51,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399932935] [2021-06-05 04:47:51,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:47:51,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:51,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:47:51,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:51,315 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 04:47:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:52,117 INFO L93 Difference]: Finished difference Result 991 states and 3102 transitions. [2021-06-05 04:47:52,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:47:52,117 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 21 [2021-06-05 04:47:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:52,119 INFO L225 Difference]: With dead ends: 991 [2021-06-05 04:47:52,119 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 04:47:52,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 770.5ms TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:47:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 04:47:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 692. [2021-06-05 04:47:52,125 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 04:47:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-06-05 04:47:52,126 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-06-05 04:47:52,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:52,126 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-06-05 04:47:52,126 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 04:47:52,126 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-06-05 04:47:52,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:52,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:52,127 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 04:47:52,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6642 [2021-06-05 04:47:52,327 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:52,328 INFO L82 PathProgramCache]: Analyzing trace with hash 530433716, now seen corresponding path program 614 times [2021-06-05 04:47:52,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:52,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555615211] [2021-06-05 04:47:52,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:52,445 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 04:47:52,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:52,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555615211] [2021-06-05 04:47:52,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555615211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:52,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351378325] [2021-06-05 04:47:52,445 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 04:47:52,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:47:52,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:47:52,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:52,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:52,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:52,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:52,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:52,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:52,922 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:52,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:52,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:52,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:52,933 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:52,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,937 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 04:47:52,938 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:52,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:52,943 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:52,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:52,949 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:52,955 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:52,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:52,959 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:52,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:52,964 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:52,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:52,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:52,969 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:53,134 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-05 04:47:53,134 INFO L628 ElimStorePlain]: treesize reduction 83, result has 69.4 percent of original size [2021-06-05 04:47:53,136 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 04:47:53,137 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:646, output treesize:108 [2021-06-05 04:47:53,319 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 04:47:53,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351378325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:53,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:53,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:47:53,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948532322] [2021-06-05 04:47:53,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:47:53,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:53,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:47:53,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:47:53,320 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 04:47:53,692 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-06-05 04:47:53,834 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-05 04:47:53,980 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 04:47:54,114 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-05 04:47:54,247 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-05 04:47:54,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:54,295 INFO L93 Difference]: Finished difference Result 940 states and 2947 transitions. [2021-06-05 04:47:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:47:54,295 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 04:47:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:54,296 INFO L225 Difference]: With dead ends: 940 [2021-06-05 04:47:54,296 INFO L226 Difference]: Without dead ends: 846 [2021-06-05 04:47:54,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1030.5ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:47:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-06-05 04:47:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 692. [2021-06-05 04:47:54,302 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 04:47:54,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-06-05 04:47:54,303 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-06-05 04:47:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:54,303 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-06-05 04:47:54,303 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 04:47:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-06-05 04:47:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:54,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:54,304 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 04:47:54,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6657,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:54,505 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:54,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:54,505 INFO L82 PathProgramCache]: Analyzing trace with hash -530344374, now seen corresponding path program 615 times [2021-06-05 04:47:54,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:54,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838902671] [2021-06-05 04:47:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:54,615 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 04:47:54,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:54,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838902671] [2021-06-05 04:47:54,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838902671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:54,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583457928] [2021-06-05 04:47:54,615 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 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 04:47:54,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:47:54,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:54,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:47:54,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:55,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:55,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,183 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 17 treesize of output 11 [2021-06-05 04:47:55,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:55,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,193 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 12 treesize of output 1 [2021-06-05 04:47:55,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:55,199 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:55,204 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,211 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:55,216 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:55,230 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:47:55,234 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:55,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:55,238 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:55,348 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 04:47:55,349 INFO L628 ElimStorePlain]: treesize reduction 43, result has 77.4 percent of original size [2021-06-05 04:47:55,351 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 04:47:55,351 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-06-05 04:47:55,500 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 04:47:55,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583457928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:55,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:55,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:47:55,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359225135] [2021-06-05 04:47:55,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:47:55,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:55,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:47:55,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:47:55,501 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 04:47:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:56,330 INFO L93 Difference]: Finished difference Result 1079 states and 3345 transitions. [2021-06-05 04:47:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:56,330 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 04:47:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:56,332 INFO L225 Difference]: With dead ends: 1079 [2021-06-05 04:47:56,332 INFO L226 Difference]: Without dead ends: 985 [2021-06-05 04:47:56,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 861.1ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:47:56,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-05 04:47:56,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 706. [2021-06-05 04:47:56,339 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 04:47:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2338 transitions. [2021-06-05 04:47:56,340 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2338 transitions. Word has length 21 [2021-06-05 04:47:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:56,340 INFO L482 AbstractCegarLoop]: Abstraction has 706 states and 2338 transitions. [2021-06-05 04:47:56,340 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 04:47:56,340 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2338 transitions. [2021-06-05 04:47:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:56,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:56,341 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 04:47:56,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6729 [2021-06-05 04:47:56,545 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:56,545 INFO L82 PathProgramCache]: Analyzing trace with hash 889543274, now seen corresponding path program 616 times [2021-06-05 04:47:56,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:56,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707723690] [2021-06-05 04:47:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:56,659 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 04:47:56,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:56,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707723690] [2021-06-05 04:47:56,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707723690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:56,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594495739] [2021-06-05 04:47:56,660 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 04:47:56,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:47:56,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:56,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:47:56,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:57,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:57,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:57,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:57,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:57,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:57,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:57,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:57,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:57,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:57,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:57,098 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 11 treesize of output 7 [2021-06-05 04:47:57,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:57,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:57,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:57,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:57,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:57,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:57,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:57,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:57,109 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:57,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:57,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:57,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:57,188 INFO L628 ElimStorePlain]: treesize reduction 44, result has 69.2 percent of original size [2021-06-05 04:47:57,190 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 04:47:57,190 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:57 [2021-06-05 04:47:57,350 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 04:47:57,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594495739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:57,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:57,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 04:47:57,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793395914] [2021-06-05 04:47:57,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:47:57,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:57,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:47:57,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:47:57,351 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 04:47:57,709 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-06-05 04:47:58,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:58,286 INFO L93 Difference]: Finished difference Result 970 states and 3035 transitions. [2021-06-05 04:47:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:47:58,286 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 04:47:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:58,287 INFO L225 Difference]: With dead ends: 970 [2021-06-05 04:47:58,287 INFO L226 Difference]: Without dead ends: 901 [2021-06-05 04:47:58,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 962.8ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:47:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-06-05 04:47:58,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 692. [2021-06-05 04:47:58,294 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 04:47:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 2269 transitions. [2021-06-05 04:47:58,295 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 2269 transitions. Word has length 21 [2021-06-05 04:47:58,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:58,295 INFO L482 AbstractCegarLoop]: Abstraction has 692 states and 2269 transitions. [2021-06-05 04:47:58,295 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 04:47:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 2269 transitions. [2021-06-05 04:47:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:58,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:58,296 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 04:47:58,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6847 [2021-06-05 04:47:58,496 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:58,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:58,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1506328576, now seen corresponding path program 617 times [2021-06-05 04:47:58,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:58,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031916752] [2021-06-05 04:47:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:47:58,615 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 04:47:58,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:47:58,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031916752] [2021-06-05 04:47:58,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031916752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:58,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371035839] [2021-06-05 04:47:58,616 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 04:47:58,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:47:58,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:47:58,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:47:58,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:47:59,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:59,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:47:59,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:59,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:59,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:47:59,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:47:59,019 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,022 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 5 treesize of output 3 [2021-06-05 04:47:59,022 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:47:59,094 INFO L628 ElimStorePlain]: treesize reduction 29, result has 76.2 percent of original size [2021-06-05 04:47:59,095 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 04:47:59,095 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:213, output treesize:49 [2021-06-05 04:47:59,171 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 04:47:59,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371035839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:47:59,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:47:59,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:47:59,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125800995] [2021-06-05 04:47:59,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:47:59,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:47:59,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:47:59,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:47:59,171 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 04:47:59,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:47:59,721 INFO L93 Difference]: Finished difference Result 872 states and 2822 transitions. [2021-06-05 04:47:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:47:59,721 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 04:47:59,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:47:59,722 INFO L225 Difference]: With dead ends: 872 [2021-06-05 04:47:59,722 INFO L226 Difference]: Without dead ends: 825 [2021-06-05 04:47:59,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:47:59,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-05 04:47:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 710. [2021-06-05 04:47:59,733 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 04:47:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2330 transitions. [2021-06-05 04:47:59,734 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2330 transitions. Word has length 21 [2021-06-05 04:47:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:47:59,735 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2330 transitions. [2021-06-05 04:47:59,735 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 04:47:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2330 transitions. [2021-06-05 04:47:59,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:47:59,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:47:59,735 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 04:47:59,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6897,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:47:59,936 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:47:59,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:47:59,936 INFO L82 PathProgramCache]: Analyzing trace with hash -970061622, now seen corresponding path program 618 times [2021-06-05 04:47:59,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:47:59,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479887535] [2021-06-05 04:47:59,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:47:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:00,041 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 04:48:00,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:00,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479887535] [2021-06-05 04:48:00,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479887535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:00,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298420392] [2021-06-05 04:48:00,041 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 04:48:00,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:48:00,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:00,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 04:48:00,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:00,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:00,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:00,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:00,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:00,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,496 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 17 treesize of output 8 [2021-06-05 04:48:00,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:00,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:00,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:00,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:00,506 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:00,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,511 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 24 treesize of output 1 [2021-06-05 04:48:00,511 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:00,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,515 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 23 treesize of output 1 [2021-06-05 04:48:00,516 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:00,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,520 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 18 treesize of output 12 [2021-06-05 04:48:00,520 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:00,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:00,524 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 24 treesize of output 12 [2021-06-05 04:48:00,524 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:00,681 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-05 04:48:00,682 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.5 percent of original size [2021-06-05 04:48:00,684 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 04:48:00,684 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:472, output treesize:108 [2021-06-05 04:48:00,865 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 04:48:00,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298420392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:00,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:00,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:48:00,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278410196] [2021-06-05 04:48:00,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:48:00,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:00,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:48:00,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:48:00,866 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 04:48:01,222 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 04:48:01,368 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 04:48:01,514 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 04:48:01,682 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 04:48:01,812 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-06-05 04:48:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:01,885 INFO L93 Difference]: Finished difference Result 1096 states and 3417 transitions. [2021-06-05 04:48:01,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:48:01,885 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 04:48:01,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:01,886 INFO L225 Difference]: With dead ends: 1096 [2021-06-05 04:48:01,886 INFO L226 Difference]: Without dead ends: 955 [2021-06-05 04:48:01,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1015.9ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:48:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-05 04:48:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 710. [2021-06-05 04:48:01,893 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 04:48:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2330 transitions. [2021-06-05 04:48:01,894 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2330 transitions. Word has length 21 [2021-06-05 04:48:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:01,894 INFO L482 AbstractCegarLoop]: Abstraction has 710 states and 2330 transitions. [2021-06-05 04:48:01,894 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 04:48:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2330 transitions. [2021-06-05 04:48:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:01,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:01,895 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 04:48:02,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6932,643 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:02,096 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:02,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:02,096 INFO L82 PathProgramCache]: Analyzing trace with hash -2030839712, now seen corresponding path program 619 times [2021-06-05 04:48:02,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:02,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086284647] [2021-06-05 04:48:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:02,209 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 04:48:02,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:02,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086284647] [2021-06-05 04:48:02,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086284647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:02,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771609842] [2021-06-05 04:48:02,210 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 04:48:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:02,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:02,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:02,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:02,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:02,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:02,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:02,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:02,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:02,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:02,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:02,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:02,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:02,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:02,754 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-05 04:48:02,755 INFO L628 ElimStorePlain]: treesize reduction 113, result has 62.1 percent of original size [2021-06-05 04:48:02,758 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 12 treesize of output 8 [2021-06-05 04:48:02,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:02,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:02,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:02,763 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:02,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:02,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:02,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:02,829 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 19 treesize of output 13 [2021-06-05 04:48:02,830 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:02,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:02,833 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:02,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:02,883 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 04:48:02,884 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-06-05 04:48:03,117 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 04:48:03,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771609842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:03,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:03,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 04:48:03,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109019501] [2021-06-05 04:48:03,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:03,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:03,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:03,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:03,117 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 04:48:03,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:03,878 INFO L93 Difference]: Finished difference Result 1025 states and 3210 transitions. [2021-06-05 04:48:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:48:03,878 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 04:48:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:03,880 INFO L225 Difference]: With dead ends: 1025 [2021-06-05 04:48:03,880 INFO L226 Difference]: Without dead ends: 956 [2021-06-05 04:48:03,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 836.7ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:48:03,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-05 04:48:03,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 719. [2021-06-05 04:48:03,887 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 04:48:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2373 transitions. [2021-06-05 04:48:03,888 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2373 transitions. Word has length 21 [2021-06-05 04:48:03,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:03,888 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2373 transitions. [2021-06-05 04:48:03,888 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 04:48:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2373 transitions. [2021-06-05 04:48:03,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:03,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:03,889 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 04:48:04,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7006,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:04,089 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:04,089 INFO L82 PathProgramCache]: Analyzing trace with hash -610952064, now seen corresponding path program 620 times [2021-06-05 04:48:04,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:04,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499021488] [2021-06-05 04:48:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:04,201 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 04:48:04,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:04,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499021488] [2021-06-05 04:48:04,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499021488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:04,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300056005] [2021-06-05 04:48:04,201 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 04:48:04,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:04,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:04,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:04,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:04,621 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_212, v_prenex_213], 1=[nondet_0, v_prenex_214]} [2021-06-05 04:48:04,625 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 04:48:04,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:04,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:04,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,758 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-06-05 04:48:04,758 INFO L628 ElimStorePlain]: treesize reduction 237, result has 38.8 percent of original size [2021-06-05 04:48:04,761 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 5 treesize of output 3 [2021-06-05 04:48:04,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,848 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.6 percent of original size [2021-06-05 04:48:04,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:04,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:04,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:04,853 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:04,855 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 04:48:04,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,925 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-06-05 04:48:04,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:04,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:04,928 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:04,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:04,963 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 04:48:04,963 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-06-05 04:48:05,126 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 04:48:05,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300056005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:05,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:05,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 04:48:05,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972412507] [2021-06-05 04:48:05,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:05,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:05,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:05,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:05,126 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 04:48:05,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:05,913 INFO L93 Difference]: Finished difference Result 1026 states and 3191 transitions. [2021-06-05 04:48:05,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:48:05,913 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 04:48:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:05,915 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 04:48:05,915 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 04:48:05,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 779.4ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:48:05,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 04:48:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 733. [2021-06-05 04:48:05,922 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 04:48:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2406 transitions. [2021-06-05 04:48:05,923 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2406 transitions. Word has length 21 [2021-06-05 04:48:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:05,923 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2406 transitions. [2021-06-05 04:48:05,923 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 04:48:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2406 transitions. [2021-06-05 04:48:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:05,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:05,924 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 04:48:06,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7068 [2021-06-05 04:48:06,124 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:06,124 INFO L82 PathProgramCache]: Analyzing trace with hash -555222134, now seen corresponding path program 621 times [2021-06-05 04:48:06,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:06,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63256190] [2021-06-05 04:48:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:06,237 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 04:48:06,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:06,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63256190] [2021-06-05 04:48:06,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63256190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:06,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372178679] [2021-06-05 04:48:06,237 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 04:48:06,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:48:06,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:06,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:06,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:06,535 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 04:48:06,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:06,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:06,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,814 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 18 treesize of output 12 [2021-06-05 04:48:06,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:06,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:06,824 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:06,829 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,833 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 19 treesize of output 13 [2021-06-05 04:48:06,834 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:06,838 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:06,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:06,843 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:06,966 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 04:48:06,967 INFO L628 ElimStorePlain]: treesize reduction 116, result has 55.7 percent of original size [2021-06-05 04:48:06,969 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 04:48:06,969 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:457, output treesize:82 [2021-06-05 04:48:07,217 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 04:48:07,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372178679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:07,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:07,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 04:48:07,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360294914] [2021-06-05 04:48:07,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:07,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:07,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:07,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:07,218 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 04:48:07,473 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 04:48:08,004 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-06-05 04:48:08,414 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-05 04:48:08,560 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-06-05 04:48:08,710 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 04:48:08,838 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-06-05 04:48:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:09,141 INFO L93 Difference]: Finished difference Result 1124 states and 3466 transitions. [2021-06-05 04:48:09,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:48:09,142 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 04:48:09,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:09,143 INFO L225 Difference]: With dead ends: 1124 [2021-06-05 04:48:09,143 INFO L226 Difference]: Without dead ends: 986 [2021-06-05 04:48:09,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2031.6ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:48:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-06-05 04:48:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 751. [2021-06-05 04:48:09,150 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 04:48:09,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2485 transitions. [2021-06-05 04:48:09,152 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2485 transitions. Word has length 21 [2021-06-05 04:48:09,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:09,152 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2485 transitions. [2021-06-05 04:48:09,152 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 04:48:09,152 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2485 transitions. [2021-06-05 04:48:09,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:09,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:09,153 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 04:48:09,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7119,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:09,353 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:09,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:09,353 INFO L82 PathProgramCache]: Analyzing trace with hash 864665514, now seen corresponding path program 622 times [2021-06-05 04:48:09,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:09,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484531604] [2021-06-05 04:48:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:09,467 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 04:48:09,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:09,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484531604] [2021-06-05 04:48:09,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484531604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:09,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662303455] [2021-06-05 04:48:09,467 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 04:48:09,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:09,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:09,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:09,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:09,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:09,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:09,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:09,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:09,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:09,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:09,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:09,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:09,972 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 12 treesize of output 8 [2021-06-05 04:48:09,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:09,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:09,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:09,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:09,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:09,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:09,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:09,980 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 1 [2021-06-05 04:48:09,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:09,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:09,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:09,985 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:10,060 INFO L628 ElimStorePlain]: treesize reduction 40, result has 71.2 percent of original size [2021-06-05 04:48:10,062 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 04:48:10,062 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:267, output treesize:57 [2021-06-05 04:48:10,228 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 04:48:10,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662303455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:10,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:10,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 04:48:10,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759051810] [2021-06-05 04:48:10,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:10,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:10,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:10,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:10,229 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 04:48:10,484 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 04:48:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:11,418 INFO L93 Difference]: Finished difference Result 1032 states and 3203 transitions. [2021-06-05 04:48:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:48:11,418 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 04:48:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:11,419 INFO L225 Difference]: With dead ends: 1032 [2021-06-05 04:48:11,419 INFO L226 Difference]: Without dead ends: 963 [2021-06-05 04:48:11,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1184.7ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-05 04:48:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 742. [2021-06-05 04:48:11,427 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 04:48:11,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2442 transitions. [2021-06-05 04:48:11,428 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2442 transitions. Word has length 21 [2021-06-05 04:48:11,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:11,428 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2442 transitions. [2021-06-05 04:48:11,428 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 04:48:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2442 transitions. [2021-06-05 04:48:11,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:11,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:11,429 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 04:48:11,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7195,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:11,629 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash 16043042, now seen corresponding path program 623 times [2021-06-05 04:48:11,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:11,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760123007] [2021-06-05 04:48:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:11,728 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 04:48:11,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:11,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760123007] [2021-06-05 04:48:11,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760123007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:11,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109709061] [2021-06-05 04:48:11,728 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 04:48:11,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:11,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:12,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,288 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 18 treesize of output 12 [2021-06-05 04:48:12,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:12,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:12,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:12,301 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,305 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 25 treesize of output 13 [2021-06-05 04:48:12,306 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:12,310 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,314 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 11 treesize of output 7 [2021-06-05 04:48:12,314 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,318 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 18 treesize of output 1 [2021-06-05 04:48:12,319 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:12,322 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 24 treesize of output 1 [2021-06-05 04:48:12,322 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:12,423 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 04:48:12,423 INFO L628 ElimStorePlain]: treesize reduction 29, result has 82.0 percent of original size [2021-06-05 04:48:12,425 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 04:48:12,425 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:376, output treesize:74 [2021-06-05 04:48:12,586 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 04:48:12,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109709061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:12,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:12,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 04:48:12,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399524636] [2021-06-05 04:48:12,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:12,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:12,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:12,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:12,586 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 04:48:12,823 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 04:48:13,001 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 04:48:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:13,697 INFO L93 Difference]: Finished difference Result 995 states and 3138 transitions. [2021-06-05 04:48:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:48:13,697 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 04:48:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:13,698 INFO L225 Difference]: With dead ends: 995 [2021-06-05 04:48:13,698 INFO L226 Difference]: Without dead ends: 926 [2021-06-05 04:48:13,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1108.3ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:48:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-06-05 04:48:13,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 733. [2021-06-05 04:48:13,705 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 04:48:13,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2406 transitions. [2021-06-05 04:48:13,706 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2406 transitions. Word has length 21 [2021-06-05 04:48:13,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:13,706 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2406 transitions. [2021-06-05 04:48:13,706 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 04:48:13,707 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2406 transitions. [2021-06-05 04:48:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:13,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:13,707 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 04:48:13,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7249,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:13,908 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash -195510068, now seen corresponding path program 624 times [2021-06-05 04:48:13,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:13,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867701168] [2021-06-05 04:48:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:14,020 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 04:48:14,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:14,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867701168] [2021-06-05 04:48:14,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867701168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:14,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122507804] [2021-06-05 04:48:14,020 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 04:48:14,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:48:14,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:14,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:14,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:14,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,534 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 12 treesize of output 8 [2021-06-05 04:48:14,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:14,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:14,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:14,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:14,551 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,555 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 18 treesize of output 12 [2021-06-05 04:48:14,555 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:14,559 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:14,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:14,563 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:14,635 INFO L628 ElimStorePlain]: treesize reduction 69, result has 56.6 percent of original size [2021-06-05 04:48:14,637 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 04:48:14,637 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:347, output treesize:48 [2021-06-05 04:48:14,750 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 04:48:14,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122507804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:14,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:14,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 04:48:14,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326237253] [2021-06-05 04:48:14,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:14,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:14,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:14,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:14,751 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 04:48:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:15,536 INFO L93 Difference]: Finished difference Result 952 states and 3054 transitions. [2021-06-05 04:48:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:48:15,536 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 04:48:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:15,537 INFO L225 Difference]: With dead ends: 952 [2021-06-05 04:48:15,537 INFO L226 Difference]: Without dead ends: 883 [2021-06-05 04:48:15,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 809.1ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:48:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2021-06-05 04:48:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 739. [2021-06-05 04:48:15,544 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 04:48:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2427 transitions. [2021-06-05 04:48:15,545 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2427 transitions. Word has length 21 [2021-06-05 04:48:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:15,545 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2427 transitions. [2021-06-05 04:48:15,545 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 04:48:15,546 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2427 transitions. [2021-06-05 04:48:15,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:15,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:15,551 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 04:48:15,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7286,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:15,753 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:15,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1623067030, now seen corresponding path program 625 times [2021-06-05 04:48:15,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:15,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792358446] [2021-06-05 04:48:15,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:15,864 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 04:48:15,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:15,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792358446] [2021-06-05 04:48:15,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792358446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:15,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677458786] [2021-06-05 04:48:15,865 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 04:48:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:15,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:15,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:16,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,285 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 25 treesize of output 13 [2021-06-05 04:48:16,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,290 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 18 treesize of output 12 [2021-06-05 04:48:16,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,295 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 11 treesize of output 7 [2021-06-05 04:48:16,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:16,299 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:16,304 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,309 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 04:48:16,309 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,313 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 24 treesize of output 1 [2021-06-05 04:48:16,314 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:16,318 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 17 treesize of output 8 [2021-06-05 04:48:16,318 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:16,322 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:16,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:16,374 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 04:48:16,375 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:445, output treesize:73 [2021-06-05 04:48:16,572 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 04:48:16,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677458786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:16,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:16,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 04:48:16,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643249972] [2021-06-05 04:48:16,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:16,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:16,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:16,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:16,572 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 04:48:17,450 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 04:48:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:17,630 INFO L93 Difference]: Finished difference Result 965 states and 3081 transitions. [2021-06-05 04:48:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:48:17,630 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 04:48:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:17,632 INFO L225 Difference]: With dead ends: 965 [2021-06-05 04:48:17,632 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 04:48:17,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1060.3ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:48:17,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 04:48:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 739. [2021-06-05 04:48:17,639 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 04:48:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2427 transitions. [2021-06-05 04:48:17,640 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2427 transitions. Word has length 21 [2021-06-05 04:48:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:17,640 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2427 transitions. [2021-06-05 04:48:17,640 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 04:48:17,640 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2427 transitions. [2021-06-05 04:48:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:17,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:17,641 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 04:48:17,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7370 [2021-06-05 04:48:17,841 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash 562288940, now seen corresponding path program 626 times [2021-06-05 04:48:17,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:17,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539836179] [2021-06-05 04:48:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:17,960 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 04:48:17,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:17,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539836179] [2021-06-05 04:48:17,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539836179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:17,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327968566] [2021-06-05 04:48:17,961 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 04:48:18,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:18,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:18,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:18,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:18,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,518 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 19 treesize of output 9 [2021-06-05 04:48:18,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:18,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:18,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:18,539 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:18,544 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:18,550 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:18,554 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:18,558 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:18,563 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:18,567 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:18,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:18,571 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:18,688 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 04:48:18,689 INFO L628 ElimStorePlain]: treesize reduction 72, result has 67.0 percent of original size [2021-06-05 04:48:18,691 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 04:48:18,691 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:82 [2021-06-05 04:48:18,924 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 04:48:18,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327968566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:18,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:18,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 04:48:18,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840004678] [2021-06-05 04:48:18,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:18,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:18,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:18,924 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 04:48:19,398 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-06-05 04:48:19,648 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-06-05 04:48:19,809 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-05 04:48:20,097 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-05 04:48:20,276 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-05 04:48:20,524 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-06-05 04:48:20,675 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-06-05 04:48:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:20,700 INFO L93 Difference]: Finished difference Result 1143 states and 3515 transitions. [2021-06-05 04:48:20,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:48:20,700 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 04:48:20,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:20,701 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 04:48:20,701 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 04:48:20,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1779.4ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:48:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 04:48:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 748. [2021-06-05 04:48:20,709 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 04:48:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2470 transitions. [2021-06-05 04:48:20,710 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2470 transitions. Word has length 21 [2021-06-05 04:48:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:20,710 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2470 transitions. [2021-06-05 04:48:20,710 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 04:48:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2470 transitions. [2021-06-05 04:48:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:20,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:20,711 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 04:48:20,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7410 [2021-06-05 04:48:20,911 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:20,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1982176588, now seen corresponding path program 627 times [2021-06-05 04:48:20,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:20,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340128700] [2021-06-05 04:48:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:21,022 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 04:48:21,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:21,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340128700] [2021-06-05 04:48:21,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340128700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:21,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751584753] [2021-06-05 04:48:21,023 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 04:48:21,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:48:21,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:21,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:21,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:21,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:21,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:21,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,513 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 5 treesize of output 3 [2021-06-05 04:48:21,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,519 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 18 treesize of output 1 [2021-06-05 04:48:21,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,524 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 17 treesize of output 8 [2021-06-05 04:48:21,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:21,528 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:21,533 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,537 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 18 treesize of output 12 [2021-06-05 04:48:21,538 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:21,543 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:21,548 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:21,552 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:21,555 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 18 treesize of output 1 [2021-06-05 04:48:21,555 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:21,669 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-06-05 04:48:21,670 INFO L628 ElimStorePlain]: treesize reduction 31, result has 81.0 percent of original size [2021-06-05 04:48:21,672 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 04:48:21,672 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-06-05 04:48:21,822 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 04:48:21,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751584753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:21,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:21,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 04:48:21,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482821142] [2021-06-05 04:48:21,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:48:21,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:21,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:48:21,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:48:21,823 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 04:48:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:22,669 INFO L93 Difference]: Finished difference Result 1014 states and 3187 transitions. [2021-06-05 04:48:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:48:22,670 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 04:48:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:22,671 INFO L225 Difference]: With dead ends: 1014 [2021-06-05 04:48:22,671 INFO L226 Difference]: Without dead ends: 945 [2021-06-05 04:48:22,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 844.6ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:48:22,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-06-05 04:48:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 730. [2021-06-05 04:48:22,678 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 04:48:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2393 transitions. [2021-06-05 04:48:22,679 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2393 transitions. Word has length 21 [2021-06-05 04:48:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:22,679 INFO L482 AbstractCegarLoop]: Abstraction has 730 states and 2393 transitions. [2021-06-05 04:48:22,679 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 04:48:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2393 transitions. [2021-06-05 04:48:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:22,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:22,680 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 04:48:22,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7531 [2021-06-05 04:48:22,881 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:22,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2037906518, now seen corresponding path program 628 times [2021-06-05 04:48:22,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:22,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541473116] [2021-06-05 04:48:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:23,027 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 04:48:23,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:23,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541473116] [2021-06-05 04:48:23,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541473116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:23,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135925283] [2021-06-05 04:48:23,027 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 04:48:23,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:23,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:23,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:23,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:23,346 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-05 04:48:23,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:23,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:23,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:23,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:23,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:23,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:23,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:23,794 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:23,799 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:23,804 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:23,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:23,809 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:23,813 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:23,817 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:23,950 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-05 04:48:23,950 INFO L628 ElimStorePlain]: treesize reduction 79, result has 65.0 percent of original size [2021-06-05 04:48:23,952 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 04:48:23,952 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 5 variables, input treesize:620, output treesize:83 [2021-06-05 04:48:24,237 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 04:48:24,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135925283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:24,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:24,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 04:48:24,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507197632] [2021-06-05 04:48:24,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:24,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:24,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:24,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:24,238 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 04:48:24,496 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 04:48:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:25,894 INFO L93 Difference]: Finished difference Result 1141 states and 3509 transitions. [2021-06-05 04:48:25,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:48:25,895 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 04:48:25,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:25,896 INFO L225 Difference]: With dead ends: 1141 [2021-06-05 04:48:25,896 INFO L226 Difference]: Without dead ends: 1003 [2021-06-05 04:48:25,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1823.9ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:48:25,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-06-05 04:48:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 748. [2021-06-05 04:48:25,903 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 04:48:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2472 transitions. [2021-06-05 04:48:25,904 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2472 transitions. Word has length 21 [2021-06-05 04:48:25,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:25,904 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2472 transitions. [2021-06-05 04:48:25,905 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 04:48:25,905 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2472 transitions. [2021-06-05 04:48:25,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:25,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:25,905 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 04:48:26,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7588,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:26,106 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:26,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:26,106 INFO L82 PathProgramCache]: Analyzing trace with hash -837173130, now seen corresponding path program 629 times [2021-06-05 04:48:26,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:26,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655902254] [2021-06-05 04:48:26,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:26,220 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 04:48:26,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:26,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655902254] [2021-06-05 04:48:26,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655902254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:26,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034822577] [2021-06-05 04:48:26,220 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 04:48:26,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:26,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:26,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:26,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:26,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:26,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:26,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:26,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:26,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,765 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 11 treesize of output 7 [2021-06-05 04:48:26,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:26,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:26,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:26,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:26,774 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:26,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:26,778 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:26,782 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 13 treesize of output 9 [2021-06-05 04:48:26,782 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:26,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:26,787 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:26,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,790 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 25 treesize of output 13 [2021-06-05 04:48:26,791 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:26,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:26,795 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:26,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:26,798 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:26,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:26,802 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 18 treesize of output 1 [2021-06-05 04:48:26,802 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:26,901 INFO L628 ElimStorePlain]: treesize reduction 57, result has 69.8 percent of original size [2021-06-05 04:48:26,903 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 04:48:26,903 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 4 variables, input treesize:518, output treesize:74 [2021-06-05 04:48:27,061 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 04:48:27,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034822577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:27,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:27,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 04:48:27,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104215909] [2021-06-05 04:48:27,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:27,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:27,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:27,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:27,062 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 04:48:27,303 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 04:48:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:28,145 INFO L93 Difference]: Finished difference Result 1164 states and 3546 transitions. [2021-06-05 04:48:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:48:28,145 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 04:48:28,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:28,147 INFO L225 Difference]: With dead ends: 1164 [2021-06-05 04:48:28,147 INFO L226 Difference]: Without dead ends: 1080 [2021-06-05 04:48:28,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1074.7ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:48:28,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-06-05 04:48:28,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 751. [2021-06-05 04:48:28,154 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 04:48:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2467 transitions. [2021-06-05 04:48:28,156 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2467 transitions. Word has length 21 [2021-06-05 04:48:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:28,156 INFO L482 AbstractCegarLoop]: Abstraction has 751 states and 2467 transitions. [2021-06-05 04:48:28,156 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 04:48:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2467 transitions. [2021-06-05 04:48:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:28,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:28,157 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 04:48:28,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 654 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7704 [2021-06-05 04:48:28,357 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1132392534, now seen corresponding path program 630 times [2021-06-05 04:48:28,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:28,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131074087] [2021-06-05 04:48:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:28,488 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 04:48:28,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:28,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131074087] [2021-06-05 04:48:28,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131074087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:28,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072921569] [2021-06-05 04:48:28,489 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 04:48:28,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:48:28,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:28,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:28,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:28,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:28,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,772 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 11 treesize of output 7 [2021-06-05 04:48:28,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,775 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 18 treesize of output 12 [2021-06-05 04:48:28,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:28,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,780 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 11 treesize of output 7 [2021-06-05 04:48:28,780 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:28,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:28,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:28,799 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-06-05 04:48:28,983 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 04:48:28,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072921569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:28,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:28,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:48:28,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255400398] [2021-06-05 04:48:28,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:48:28,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:28,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:48:28,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:48:28,984 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 04:48:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:30,105 INFO L93 Difference]: Finished difference Result 1118 states and 3569 transitions. [2021-06-05 04:48:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:48:30,105 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 04:48:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:30,106 INFO L225 Difference]: With dead ends: 1118 [2021-06-05 04:48:30,106 INFO L226 Difference]: Without dead ends: 1042 [2021-06-05 04:48:30,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 984.4ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:48:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-05 04:48:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 721. [2021-06-05 04:48:30,114 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 04:48:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2366 transitions. [2021-06-05 04:48:30,115 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2366 transitions. Word has length 21 [2021-06-05 04:48:30,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:30,115 INFO L482 AbstractCegarLoop]: Abstraction has 721 states and 2366 transitions. [2021-06-05 04:48:30,115 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 04:48:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2366 transitions. [2021-06-05 04:48:30,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:30,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:30,116 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 04:48:30,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7761,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:30,316 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:30,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:30,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1480674806, now seen corresponding path program 631 times [2021-06-05 04:48:30,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:30,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387055379] [2021-06-05 04:48:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:30,420 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 04:48:30,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:30,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387055379] [2021-06-05 04:48:30,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387055379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:30,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749849759] [2021-06-05 04:48:30,420 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 04:48:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:30,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:30,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:30,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:30,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:30,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:30,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:30,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:30,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:30,930 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 25 treesize of output 13 [2021-06-05 04:48:30,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:30,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:30,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,053 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 04:48:31,053 INFO L628 ElimStorePlain]: treesize reduction 164, result has 45.7 percent of original size [2021-06-05 04:48:31,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:31,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:31,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:31,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:31,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:31,106 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 18 treesize of output 12 [2021-06-05 04:48:31,107 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:31,110 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:31,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:31,155 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 04:48:31,155 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:385, output treesize:83 [2021-06-05 04:48:31,396 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 04:48:31,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749849759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:31,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:31,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 04:48:31,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457966985] [2021-06-05 04:48:31,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:48:31,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:31,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:48:31,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:31,397 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 04:48:31,656 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-05 04:48:31,835 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 04:48:32,001 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 04:48:32,185 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 04:48:32,372 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-06-05 04:48:32,530 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 04:48:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:32,618 INFO L93 Difference]: Finished difference Result 1233 states and 3826 transitions. [2021-06-05 04:48:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:48:32,619 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 04:48:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:32,620 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 04:48:32,620 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 04:48:32,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1323.8ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 04:48:32,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 748. [2021-06-05 04:48:32,629 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 04:48:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2481 transitions. [2021-06-05 04:48:32,630 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2481 transitions. Word has length 21 [2021-06-05 04:48:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:32,630 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2481 transitions. [2021-06-05 04:48:32,630 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 04:48:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2481 transitions. [2021-06-05 04:48:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:32,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:32,631 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 04:48:32,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7777,656 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:32,831 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:32,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:32,831 INFO L82 PathProgramCache]: Analyzing trace with hash -60787158, now seen corresponding path program 632 times [2021-06-05 04:48:32,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:32,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319378517] [2021-06-05 04:48:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:32,942 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 04:48:32,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:32,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319378517] [2021-06-05 04:48:32,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319378517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:32,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600036923] [2021-06-05 04:48:32,942 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 04:48:33,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:33,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:33,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:33,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:33,465 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_241, v_prenex_243], 1=[v_prenex_242, nondet_0]} [2021-06-05 04:48:33,469 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 04:48:33,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,473 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 12 treesize of output 8 [2021-06-05 04:48:33,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:33,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,598 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-05 04:48:33,599 INFO L628 ElimStorePlain]: treesize reduction 219, result has 40.3 percent of original size [2021-06-05 04:48:33,601 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 5 treesize of output 3 [2021-06-05 04:48:33,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,696 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.4 percent of original size [2021-06-05 04:48:33,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:33,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:33,700 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:33,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:33,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:33,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:33,745 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:33,748 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 04:48:33,748 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:33,814 INFO L628 ElimStorePlain]: treesize reduction 1, result has 98.9 percent of original size [2021-06-05 04:48:33,816 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 04:48:33,816 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:422, output treesize:74 [2021-06-05 04:48:33,976 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 04:48:33,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600036923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:33,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:33,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 04:48:33,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225032675] [2021-06-05 04:48:33,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:48:33,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:33,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:48:33,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:48:33,977 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 04:48:34,244 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 04:48:35,368 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 04:48:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:35,516 INFO L93 Difference]: Finished difference Result 1339 states and 4052 transitions. [2021-06-05 04:48:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:48:35,517 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 04:48:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:35,518 INFO L225 Difference]: With dead ends: 1339 [2021-06-05 04:48:35,518 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 04:48:35,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1484.7ms TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:48:35,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 04:48:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 755. [2021-06-05 04:48:35,526 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 04:48:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2486 transitions. [2021-06-05 04:48:35,528 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2486 transitions. Word has length 21 [2021-06-05 04:48:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:35,528 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2486 transitions. [2021-06-05 04:48:35,528 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 04:48:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2486 transitions. [2021-06-05 04:48:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:35,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:35,529 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 04:48:35,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7838 [2021-06-05 04:48:35,729 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:35,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1908778506, now seen corresponding path program 633 times [2021-06-05 04:48:35,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:35,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344661498] [2021-06-05 04:48:35,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:35,852 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 04:48:35,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:35,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344661498] [2021-06-05 04:48:35,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344661498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:35,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165400770] [2021-06-05 04:48:35,853 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 04:48:35,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:48:35,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:35,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:35,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:36,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:36,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,147 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 11 treesize of output 7 [2021-06-05 04:48:36,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:36,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,152 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:36,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,154 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 11 treesize of output 7 [2021-06-05 04:48:36,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:36,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:36,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:36,173 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-06-05 04:48:36,361 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 04:48:36,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165400770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:36,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:36,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:48:36,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962585307] [2021-06-05 04:48:36,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:48:36,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:36,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:48:36,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:48:36,362 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 04:48:37,664 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-06-05 04:48:38,025 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 04:48:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:38,120 INFO L93 Difference]: Finished difference Result 1546 states and 4721 transitions. [2021-06-05 04:48:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:48:38,120 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 04:48:38,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:38,122 INFO L225 Difference]: With dead ends: 1546 [2021-06-05 04:48:38,122 INFO L226 Difference]: Without dead ends: 1455 [2021-06-05 04:48:38,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1529.2ms TimeCoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:48:38,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-06-05 04:48:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 748. [2021-06-05 04:48:38,132 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 04:48:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2459 transitions. [2021-06-05 04:48:38,133 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2459 transitions. Word has length 21 [2021-06-05 04:48:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:38,133 INFO L482 AbstractCegarLoop]: Abstraction has 748 states and 2459 transitions. [2021-06-05 04:48:38,133 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 04:48:38,133 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2459 transitions. [2021-06-05 04:48:38,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:48:38,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:38,134 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 04:48:38,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7902,658 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:38,334 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:38,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:38,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1427259128, now seen corresponding path program 634 times [2021-06-05 04:48:38,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:38,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128778605] [2021-06-05 04:48:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:38,445 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 04:48:38,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:38,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128778605] [2021-06-05 04:48:38,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128778605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:38,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998627177] [2021-06-05 04:48:38,446 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 04:48:38,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:38,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:38,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:48:38,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:38,700 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 12 treesize of output 8 [2021-06-05 04:48:38,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,703 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 11 treesize of output 7 [2021-06-05 04:48:38,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:38,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:38,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,710 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 11 treesize of output 7 [2021-06-05 04:48:38,711 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:38,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:38,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:48:38,729 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:137, output treesize:57 [2021-06-05 04:48:38,903 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 04:48:38,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998627177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:38,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:38,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 04:48:38,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50560572] [2021-06-05 04:48:38,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:48:38,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:38,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:48:38,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:48:38,903 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 04:48:40,020 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-06-05 04:48:40,308 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-06-05 04:48:40,958 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-05 04:48:41,315 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 04:48:41,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:41,415 INFO L93 Difference]: Finished difference Result 1789 states and 5418 transitions. [2021-06-05 04:48:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:48:41,416 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 04:48:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:41,418 INFO L225 Difference]: With dead ends: 1789 [2021-06-05 04:48:41,418 INFO L226 Difference]: Without dead ends: 1705 [2021-06-05 04:48:41,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2212.7ms TimeCoverageRelationStatistics Valid=417, Invalid=2133, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 04:48:41,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-06-05 04:48:41,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 776. [2021-06-05 04:48:41,429 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 04:48:41,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2548 transitions. [2021-06-05 04:48:41,430 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2548 transitions. Word has length 21 [2021-06-05 04:48:41,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:41,430 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2548 transitions. [2021-06-05 04:48:41,430 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 04:48:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2548 transitions. [2021-06-05 04:48:41,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:41,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:41,431 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 04:48:41,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7921,659 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:41,631 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:41,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:41,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1507938877, now seen corresponding path program 635 times [2021-06-05 04:48:41,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:41,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024764312] [2021-06-05 04:48:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:41,692 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 04:48:41,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:41,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024764312] [2021-06-05 04:48:41,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024764312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:41,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209192037] [2021-06-05 04:48:41,692 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 04:48:41,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:48:41,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:41,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:48:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:41,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:41,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:41,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:48:41,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:41,897 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:48:41,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:48:41,898 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:48:41,938 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 04:48:41,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209192037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:41,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:41,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:48:41,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333414691] [2021-06-05 04:48:41,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:48:41,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:41,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:48:41,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:48:41,939 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 04:48:42,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:42,290 INFO L93 Difference]: Finished difference Result 1186 states and 3742 transitions. [2021-06-05 04:48:42,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:48:42,290 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 04:48:42,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:42,292 INFO L225 Difference]: With dead ends: 1186 [2021-06-05 04:48:42,292 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 04:48:42,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:48:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 04:48:42,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 773. [2021-06-05 04:48:42,300 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 04:48:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2550 transitions. [2021-06-05 04:48:42,301 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2550 transitions. Word has length 22 [2021-06-05 04:48:42,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:42,301 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2550 transitions. [2021-06-05 04:48:42,301 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 04:48:42,301 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2550 transitions. [2021-06-05 04:48:42,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:42,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:42,302 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 04:48:42,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7933,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:42,503 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:42,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:42,503 INFO L82 PathProgramCache]: Analyzing trace with hash -955884418, now seen corresponding path program 636 times [2021-06-05 04:48:42,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:42,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590570134] [2021-06-05 04:48:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:42,598 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 04:48:42,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:42,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590570134] [2021-06-05 04:48:42,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590570134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:42,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627017845] [2021-06-05 04:48:42,599 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 04:48:42,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:48:42,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:42,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:48:42,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:42,945 INFO L446 ElimStorePlain]: Different costs {0=[nondet_0, v_prenex_247], 1=[v_prenex_251, v_prenex_249]} [2021-06-05 04:48:42,948 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 5 treesize of output 3 [2021-06-05 04:48:42,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:42,995 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.4 percent of original size [2021-06-05 04:48:42,997 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 6 treesize of output 4 [2021-06-05 04:48:42,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:43,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:43,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:43,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:43,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:43,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:43,022 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 5 treesize of output 3 [2021-06-05 04:48:43,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:43,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:48:43,039 INFO L518 ElimStorePlain]: Eliminatee v_prenex_249 vanished before elimination [2021-06-05 04:48:43,041 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 04:48:43,041 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-06-05 04:48:43,089 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 04:48:43,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627017845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:43,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:43,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:48:43,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545874956] [2021-06-05 04:48:43,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:48:43,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:43,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:48:43,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:48:43,090 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 04:48:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:43,859 INFO L93 Difference]: Finished difference Result 1181 states and 3688 transitions. [2021-06-05 04:48:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:43,859 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 04:48:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:43,861 INFO L225 Difference]: With dead ends: 1181 [2021-06-05 04:48:43,861 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 04:48:43,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 692.3ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:43,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 04:48:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 795. [2021-06-05 04:48:43,869 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 04:48:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2605 transitions. [2021-06-05 04:48:43,870 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2605 transitions. Word has length 22 [2021-06-05 04:48:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:43,871 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2605 transitions. [2021-06-05 04:48:43,871 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 04:48:43,871 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2605 transitions. [2021-06-05 04:48:43,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:43,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:43,872 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 04:48:44,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7937,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:44,072 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:44,072 INFO L82 PathProgramCache]: Analyzing trace with hash 202759112, now seen corresponding path program 637 times [2021-06-05 04:48:44,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:44,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598591636] [2021-06-05 04:48:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:44,165 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 04:48:44,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:44,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598591636] [2021-06-05 04:48:44,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598591636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:44,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753187448] [2021-06-05 04:48:44,166 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 04:48:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:44,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:48:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:44,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:44,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:44,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:44,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:44,509 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 04:48:44,509 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:48:44,510 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 04:48:44,510 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 04:48:44,563 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 04:48:44,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753187448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:44,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:44,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:48:44,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26141750] [2021-06-05 04:48:44,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:48:44,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:44,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:48:44,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:48:44,564 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 04:48:45,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:45,174 INFO L93 Difference]: Finished difference Result 1233 states and 3809 transitions. [2021-06-05 04:48:45,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:45,174 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 04:48:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:45,175 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 04:48:45,175 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 04:48:45,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 594.7ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:45,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 04:48:45,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 798. [2021-06-05 04:48:45,185 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 04:48:45,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2616 transitions. [2021-06-05 04:48:45,186 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2616 transitions. Word has length 22 [2021-06-05 04:48:45,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:45,186 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2616 transitions. [2021-06-05 04:48:45,186 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 04:48:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2616 transitions. [2021-06-05 04:48:45,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:45,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:45,187 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 04:48:45,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7952,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:45,387 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:45,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:45,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1291148610, now seen corresponding path program 638 times [2021-06-05 04:48:45,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:45,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486070994] [2021-06-05 04:48:45,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:45,478 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 04:48:45,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:45,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486070994] [2021-06-05 04:48:45,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486070994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:45,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813919585] [2021-06-05 04:48:45,478 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 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 04:48:45,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:45,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:45,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:48:45,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:45,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:45,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:48:45,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:48:45,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:45,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:48:45,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:48:45,850 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 04:48:45,850 INFO L518 ElimStorePlain]: Eliminatee v_prenex_259 vanished before elimination [2021-06-05 04:48:45,851 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 04:48:45,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 04:48:45,899 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 04:48:45,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813919585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:45,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:45,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:48:45,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170979306] [2021-06-05 04:48:45,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:48:45,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:45,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:48:45,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:48:45,900 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 04:48:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:46,548 INFO L93 Difference]: Finished difference Result 1190 states and 3706 transitions. [2021-06-05 04:48:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:46,548 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 04:48:46,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:46,550 INFO L225 Difference]: With dead ends: 1190 [2021-06-05 04:48:46,550 INFO L226 Difference]: Without dead ends: 1184 [2021-06-05 04:48:46,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 620.2ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:46,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-06-05 04:48:46,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 790. [2021-06-05 04:48:46,558 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 04:48:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2592 transitions. [2021-06-05 04:48:46,560 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2592 transitions. Word has length 22 [2021-06-05 04:48:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:46,560 INFO L482 AbstractCegarLoop]: Abstraction has 790 states and 2592 transitions. [2021-06-05 04:48:46,560 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 04:48:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2592 transitions. [2021-06-05 04:48:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:46,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:46,561 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 04:48:46,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7968,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:46,761 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1296850700, now seen corresponding path program 639 times [2021-06-05 04:48:46,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:46,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832003402] [2021-06-05 04:48:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:46,870 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 04:48:46,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:46,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832003402] [2021-06-05 04:48:46,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832003402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:46,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333428821] [2021-06-05 04:48:46,871 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 04:48:46,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:48:46,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:46,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:48:46,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:47,356 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 04:48:47,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333428821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:47,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:47,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:48:47,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2222219] [2021-06-05 04:48:47,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:48:47,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:47,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:48:47,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:48:47,357 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 04:48:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:48,072 INFO L93 Difference]: Finished difference Result 1167 states and 3629 transitions. [2021-06-05 04:48:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:48,072 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 04:48:48,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:48,074 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 04:48:48,074 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 04:48:48,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 732.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:48,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 04:48:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 796. [2021-06-05 04:48:48,083 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 04:48:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2614 transitions. [2021-06-05 04:48:48,084 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2614 transitions. Word has length 22 [2021-06-05 04:48:48,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:48,084 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2614 transitions. [2021-06-05 04:48:48,084 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 04:48:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2614 transitions. [2021-06-05 04:48:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:48,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:48,085 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 04:48:48,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7985 [2021-06-05 04:48:48,285 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:48,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:48,286 INFO L82 PathProgramCache]: Analyzing trace with hash -197057022, now seen corresponding path program 640 times [2021-06-05 04:48:48,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:48,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747261101] [2021-06-05 04:48:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:48,399 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 04:48:48,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:48,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747261101] [2021-06-05 04:48:48,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747261101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:48,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553593735] [2021-06-05 04:48:48,400 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 04:48:48,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:48,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:48,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:48:48,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:48,860 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 04:48:48,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553593735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:48,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:48,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:48:48,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265129876] [2021-06-05 04:48:48,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:48:48,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:48,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:48:48,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:48:48,861 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 04:48:49,449 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-06-05 04:48:49,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:49,634 INFO L93 Difference]: Finished difference Result 1173 states and 3636 transitions. [2021-06-05 04:48:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:49,634 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 04:48:49,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:49,636 INFO L225 Difference]: With dead ends: 1173 [2021-06-05 04:48:49,636 INFO L226 Difference]: Without dead ends: 1167 [2021-06-05 04:48:49,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 815.4ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:49,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-06-05 04:48:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 793. [2021-06-05 04:48:49,645 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 04:48:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2603 transitions. [2021-06-05 04:48:49,646 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2603 transitions. Word has length 22 [2021-06-05 04:48:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:49,646 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2603 transitions. [2021-06-05 04:48:49,646 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 04:48:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2603 transitions. [2021-06-05 04:48:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:49,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:49,647 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 04:48:49,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8001,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:49,847 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:49,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:49,847 INFO L82 PathProgramCache]: Analyzing trace with hash 340798556, now seen corresponding path program 641 times [2021-06-05 04:48:49,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:49,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17282039] [2021-06-05 04:48:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:49,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:49,963 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 04:48:49,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:49,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17282039] [2021-06-05 04:48:49,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17282039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:49,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688724620] [2021-06-05 04:48:49,964 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 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 04:48:50,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:48:50,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:50,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:48:50,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:50,388 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 04:48:50,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688724620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:50,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:50,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:48:50,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121084780] [2021-06-05 04:48:50,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:48:50,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:50,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:48:50,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:48:50,389 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 04:48:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:51,162 INFO L93 Difference]: Finished difference Result 1131 states and 3541 transitions. [2021-06-05 04:48:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:51,162 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 04:48:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:51,164 INFO L225 Difference]: With dead ends: 1131 [2021-06-05 04:48:51,164 INFO L226 Difference]: Without dead ends: 1119 [2021-06-05 04:48:51,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 779.3ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-06-05 04:48:51,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 793. [2021-06-05 04:48:51,172 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 04:48:51,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2600 transitions. [2021-06-05 04:48:51,173 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2600 transitions. Word has length 22 [2021-06-05 04:48:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:51,174 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2600 transitions. [2021-06-05 04:48:51,174 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 04:48:51,174 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2600 transitions. [2021-06-05 04:48:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:51,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:51,174 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 04:48:51,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8022 [2021-06-05 04:48:51,375 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:51,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:51,375 INFO L82 PathProgramCache]: Analyzing trace with hash 853951560, now seen corresponding path program 642 times [2021-06-05 04:48:51,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:51,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732227820] [2021-06-05 04:48:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:51,477 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 04:48:51,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:51,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732227820] [2021-06-05 04:48:51,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732227820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:51,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147426858] [2021-06-05 04:48:51,478 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 04:48:51,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:48:51,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:51,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:48:51,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:51,976 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 04:48:51,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147426858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:51,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:51,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:48:51,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636118173] [2021-06-05 04:48:51,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:48:51,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:51,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:48:51,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:48:51,976 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 04:48:52,468 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 04:48:52,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:52,787 INFO L93 Difference]: Finished difference Result 1164 states and 3618 transitions. [2021-06-05 04:48:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:52,787 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 04:48:52,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:52,789 INFO L225 Difference]: With dead ends: 1164 [2021-06-05 04:48:52,789 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 04:48:52,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 852.0ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 04:48:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 802. [2021-06-05 04:48:52,798 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 04:48:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2633 transitions. [2021-06-05 04:48:52,799 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2633 transitions. Word has length 22 [2021-06-05 04:48:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:52,799 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2633 transitions. [2021-06-05 04:48:52,799 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 04:48:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2633 transitions. [2021-06-05 04:48:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:52,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:52,800 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 04:48:53,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8042,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:53,000 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:53,000 INFO L82 PathProgramCache]: Analyzing trace with hash -639956162, now seen corresponding path program 643 times [2021-06-05 04:48:53,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:53,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876022871] [2021-06-05 04:48:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:53,109 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 04:48:53,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:53,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876022871] [2021-06-05 04:48:53,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876022871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:53,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429184059] [2021-06-05 04:48:53,109 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 04:48:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:53,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:48:53,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:53,588 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 04:48:53,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429184059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:53,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:53,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:48:53,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776518353] [2021-06-05 04:48:53,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:48:53,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:53,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:48:53,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:48:53,589 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 04:48:54,254 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 04:48:54,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:54,493 INFO L93 Difference]: Finished difference Result 1170 states and 3625 transitions. [2021-06-05 04:48:54,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:54,494 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 04:48:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:54,495 INFO L225 Difference]: With dead ends: 1170 [2021-06-05 04:48:54,495 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 04:48:54,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 891.7ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:54,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 04:48:54,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 799. [2021-06-05 04:48:54,504 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 04:48:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2622 transitions. [2021-06-05 04:48:54,505 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2622 transitions. Word has length 22 [2021-06-05 04:48:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:54,505 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2622 transitions. [2021-06-05 04:48:54,505 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 04:48:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2622 transitions. [2021-06-05 04:48:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:54,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:54,506 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 04:48:54,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 668 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8059 [2021-06-05 04:48:54,707 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:54,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:54,707 INFO L82 PathProgramCache]: Analyzing trace with hash -102100584, now seen corresponding path program 644 times [2021-06-05 04:48:54,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:54,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610162772] [2021-06-05 04:48:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:54,830 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 04:48:54,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:54,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610162772] [2021-06-05 04:48:54,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610162772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:54,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942723254] [2021-06-05 04:48:54,830 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 04:48:54,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:48:54,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:54,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:48:54,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:55,261 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 04:48:55,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942723254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:55,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:55,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:48:55,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460290918] [2021-06-05 04:48:55,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:48:55,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:55,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:48:55,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:48:55,261 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 04:48:55,770 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 04:48:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:56,109 INFO L93 Difference]: Finished difference Result 1134 states and 3543 transitions. [2021-06-05 04:48:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:56,109 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 04:48:56,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:56,111 INFO L225 Difference]: With dead ends: 1134 [2021-06-05 04:48:56,111 INFO L226 Difference]: Without dead ends: 1122 [2021-06-05 04:48:56,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 860.2ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:56,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-06-05 04:48:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 796. [2021-06-05 04:48:56,119 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 04:48:56,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2611 transitions. [2021-06-05 04:48:56,120 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2611 transitions. Word has length 22 [2021-06-05 04:48:56,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:56,120 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2611 transitions. [2021-06-05 04:48:56,121 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 04:48:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2611 transitions. [2021-06-05 04:48:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:56,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:56,121 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 04:48:56,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8078 [2021-06-05 04:48:56,322 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:56,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:56,322 INFO L82 PathProgramCache]: Analyzing trace with hash -608446850, now seen corresponding path program 645 times [2021-06-05 04:48:56,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:56,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431138658] [2021-06-05 04:48:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:56,420 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 04:48:56,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:56,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431138658] [2021-06-05 04:48:56,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431138658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:56,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102433278] [2021-06-05 04:48:56,421 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 04:48:56,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:48:56,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:56,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:48:56,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:56,839 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 04:48:56,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102433278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:56,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:56,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:48:56,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626510304] [2021-06-05 04:48:56,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:48:56,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:56,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:48:56,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:48:56,840 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 04:48:57,351 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 04:48:57,571 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-05 04:48:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:57,735 INFO L93 Difference]: Finished difference Result 1125 states and 3519 transitions. [2021-06-05 04:48:57,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:57,735 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 04:48:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:57,737 INFO L225 Difference]: With dead ends: 1125 [2021-06-05 04:48:57,737 INFO L226 Difference]: Without dead ends: 1107 [2021-06-05 04:48:57,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 873.0ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-06-05 04:48:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 796. [2021-06-05 04:48:57,745 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 04:48:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2608 transitions. [2021-06-05 04:48:57,746 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2608 transitions. Word has length 22 [2021-06-05 04:48:57,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:57,746 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2608 transitions. [2021-06-05 04:48:57,746 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 04:48:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2608 transitions. [2021-06-05 04:48:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:57,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:57,747 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 04:48:57,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8093,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:57,948 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:57,948 INFO L82 PathProgramCache]: Analyzing trace with hash -835991344, now seen corresponding path program 646 times [2021-06-05 04:48:57,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:57,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505572622] [2021-06-05 04:48:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:58,065 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 04:48:58,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:58,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505572622] [2021-06-05 04:48:58,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505572622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:58,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084813837] [2021-06-05 04:48:58,065 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 04:48:58,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:48:58,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:48:58,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:48:58,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:48:58,542 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 04:48:58,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084813837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:58,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:48:58,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:48:58,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541666961] [2021-06-05 04:48:58,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:48:58,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:48:58,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:48:58,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:48:58,543 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 04:48:58,966 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 04:48:59,142 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-05 04:48:59,322 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 04:48:59,482 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2021-06-05 04:48:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:48:59,648 INFO L93 Difference]: Finished difference Result 1221 states and 3760 transitions. [2021-06-05 04:48:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:48:59,648 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 04:48:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:48:59,649 INFO L225 Difference]: With dead ends: 1221 [2021-06-05 04:48:59,649 INFO L226 Difference]: Without dead ends: 1221 [2021-06-05 04:48:59,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1098.5ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:48:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-05 04:48:59,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 808. [2021-06-05 04:48:59,658 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 04:48:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2652 transitions. [2021-06-05 04:48:59,660 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2652 transitions. Word has length 22 [2021-06-05 04:48:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:48:59,660 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2652 transitions. [2021-06-05 04:48:59,660 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 04:48:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2652 transitions. [2021-06-05 04:48:59,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:48:59,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:48:59,661 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 04:48:59,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8108,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:48:59,861 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:48:59,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:48:59,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1965068230, now seen corresponding path program 647 times [2021-06-05 04:48:59,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:48:59,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147089374] [2021-06-05 04:48:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:48:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:48:59,962 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 04:48:59,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:48:59,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147089374] [2021-06-05 04:48:59,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147089374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:48:59,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131490193] [2021-06-05 04:48:59,962 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 04:49:00,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:49:00,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:00,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:00,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:00,476 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 04:49:00,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131490193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:00,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:00,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:00,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660125371] [2021-06-05 04:49:00,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:00,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:00,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:00,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:00,477 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 04:49:00,851 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-05 04:49:01,019 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-06-05 04:49:01,194 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-06-05 04:49:01,356 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-05 04:49:01,524 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-05 04:49:01,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:01,553 INFO L93 Difference]: Finished difference Result 1227 states and 3767 transitions. [2021-06-05 04:49:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:01,553 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 04:49:01,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:01,555 INFO L225 Difference]: With dead ends: 1227 [2021-06-05 04:49:01,555 INFO L226 Difference]: Without dead ends: 1221 [2021-06-05 04:49:01,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1154.0ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:01,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-05 04:49:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 805. [2021-06-05 04:49:01,565 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 04:49:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2641 transitions. [2021-06-05 04:49:01,566 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2641 transitions. Word has length 22 [2021-06-05 04:49:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:01,566 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2641 transitions. [2021-06-05 04:49:01,566 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 04:49:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2641 transitions. [2021-06-05 04:49:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:01,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:01,567 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 04:49:01,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8123 [2021-06-05 04:49:01,767 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1792043488, now seen corresponding path program 648 times [2021-06-05 04:49:01,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:01,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942158774] [2021-06-05 04:49:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:01,880 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 04:49:01,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:01,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942158774] [2021-06-05 04:49:01,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942158774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:01,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533841843] [2021-06-05 04:49:01,881 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 04:49:02,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:49:02,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:02,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:02,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:02,339 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 04:49:02,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533841843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:02,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:02,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:02,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88397811] [2021-06-05 04:49:02,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:02,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:02,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:02,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:02,340 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 04:49:02,756 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-05 04:49:02,931 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2021-06-05 04:49:03,121 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 04:49:03,298 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-06-05 04:49:03,460 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-06-05 04:49:03,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:03,479 INFO L93 Difference]: Finished difference Result 1191 states and 3685 transitions. [2021-06-05 04:49:03,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:03,480 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 04:49:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:03,481 INFO L225 Difference]: With dead ends: 1191 [2021-06-05 04:49:03,481 INFO L226 Difference]: Without dead ends: 1179 [2021-06-05 04:49:03,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1148.2ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-05 04:49:03,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 802. [2021-06-05 04:49:03,490 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 04:49:03,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2630 transitions. [2021-06-05 04:49:03,491 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2630 transitions. Word has length 22 [2021-06-05 04:49:03,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:03,491 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2630 transitions. [2021-06-05 04:49:03,491 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 04:49:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2630 transitions. [2021-06-05 04:49:03,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:03,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:03,492 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 04:49:03,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8141,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:03,705 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:03,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:03,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1996577542, now seen corresponding path program 649 times [2021-06-05 04:49:03,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:03,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026242668] [2021-06-05 04:49:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:03,805 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 04:49:03,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:03,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026242668] [2021-06-05 04:49:03,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026242668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:03,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333382015] [2021-06-05 04:49:03,805 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 04:49:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:03,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:03,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:04,253 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 04:49:04,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333382015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:04,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:04,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:04,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065615944] [2021-06-05 04:49:04,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:04,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:04,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:04,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:04,254 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 04:49:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:05,137 INFO L93 Difference]: Finished difference Result 1188 states and 3674 transitions. [2021-06-05 04:49:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:05,137 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 04:49:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:05,138 INFO L225 Difference]: With dead ends: 1188 [2021-06-05 04:49:05,138 INFO L226 Difference]: Without dead ends: 1170 [2021-06-05 04:49:05,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 875.7ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-06-05 04:49:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 799. [2021-06-05 04:49:05,147 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 04:49:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2619 transitions. [2021-06-05 04:49:05,148 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2619 transitions. Word has length 22 [2021-06-05 04:49:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:05,148 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2619 transitions. [2021-06-05 04:49:05,148 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 04:49:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2619 transitions. [2021-06-05 04:49:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:05,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:05,149 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 04:49:05,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8155 [2021-06-05 04:49:05,350 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:05,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:05,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1258153956, now seen corresponding path program 650 times [2021-06-05 04:49:05,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:05,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707462350] [2021-06-05 04:49:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:05,443 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 04:49:05,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:05,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707462350] [2021-06-05 04:49:05,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707462350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:05,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104504512] [2021-06-05 04:49:05,443 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 04:49:05,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:05,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:05,852 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 04:49:05,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104504512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:05,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:05,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:05,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331825395] [2021-06-05 04:49:05,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:05,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:05,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:05,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:05,853 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 04:49:06,273 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 04:49:06,437 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-06-05 04:49:06,608 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2021-06-05 04:49:06,758 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-06-05 04:49:06,906 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-06-05 04:49:06,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:06,930 INFO L93 Difference]: Finished difference Result 1179 states and 3650 transitions. [2021-06-05 04:49:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:06,930 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 04:49:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:06,932 INFO L225 Difference]: With dead ends: 1179 [2021-06-05 04:49:06,932 INFO L226 Difference]: Without dead ends: 1155 [2021-06-05 04:49:06,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1043.6ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-06-05 04:49:06,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 799. [2021-06-05 04:49:06,941 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 04:49:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2616 transitions. [2021-06-05 04:49:06,942 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2616 transitions. Word has length 22 [2021-06-05 04:49:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:06,942 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2616 transitions. [2021-06-05 04:49:06,942 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 04:49:06,942 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2616 transitions. [2021-06-05 04:49:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:06,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:06,943 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 04:49:07,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 675 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8168 [2021-06-05 04:49:07,143 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:07,144 INFO L82 PathProgramCache]: Analyzing trace with hash 644309949, now seen corresponding path program 651 times [2021-06-05 04:49:07,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:07,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425537134] [2021-06-05 04:49:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:07,205 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 04:49:07,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:07,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425537134] [2021-06-05 04:49:07,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425537134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:07,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893761040] [2021-06-05 04:49:07,206 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 04:49:07,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:49:07,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:07,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:07,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:07,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:07,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:07,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:07,414 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:49:07,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:49:07,415 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:49:07,456 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 04:49:07,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893761040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:07,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:07,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:49:07,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811466921] [2021-06-05 04:49:07,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:07,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:07,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:07,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:07,457 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 04:49:07,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:07,838 INFO L93 Difference]: Finished difference Result 1303 states and 4070 transitions. [2021-06-05 04:49:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:49:07,838 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 04:49:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:07,839 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 04:49:07,839 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 04:49:07,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 272.2ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:49:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 04:49:07,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 806. [2021-06-05 04:49:07,848 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 04:49:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2645 transitions. [2021-06-05 04:49:07,849 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2645 transitions. Word has length 22 [2021-06-05 04:49:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:07,850 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2645 transitions. [2021-06-05 04:49:07,850 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 04:49:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2645 transitions. [2021-06-05 04:49:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:07,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:07,851 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 04:49:08,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8187 [2021-06-05 04:49:08,051 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash -8767304, now seen corresponding path program 652 times [2021-06-05 04:49:08,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:08,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716401920] [2021-06-05 04:49:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:08,155 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 04:49:08,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:08,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716401920] [2021-06-05 04:49:08,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716401920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:08,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420817710] [2021-06-05 04:49:08,156 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 04:49:08,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:08,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:08,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:08,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:08,514 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_309, nondet_0], 1=[v_prenex_310, v_prenex_313]} [2021-06-05 04:49:08,517 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 6 treesize of output 4 [2021-06-05 04:49:08,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:08,563 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.0 percent of original size [2021-06-05 04:49:08,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:08,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:08,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:08,587 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 5 treesize of output 3 [2021-06-05 04:49:08,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:08,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:08,590 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 12 treesize of output 8 [2021-06-05 04:49:08,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:08,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:08,607 INFO L518 ElimStorePlain]: Eliminatee v_prenex_313 vanished before elimination [2021-06-05 04:49:08,608 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 04:49:08,608 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-06-05 04:49:08,658 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 04:49:08,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420817710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:08,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:08,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:08,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726734642] [2021-06-05 04:49:08,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:08,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:08,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:08,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:08,658 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 04:49:09,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:09,359 INFO L93 Difference]: Finished difference Result 1256 states and 3898 transitions. [2021-06-05 04:49:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:09,359 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 04:49:09,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:09,361 INFO L225 Difference]: With dead ends: 1256 [2021-06-05 04:49:09,361 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 04:49:09,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:09,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 04:49:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 821. [2021-06-05 04:49:09,370 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 04:49:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2684 transitions. [2021-06-05 04:49:09,371 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2684 transitions. Word has length 22 [2021-06-05 04:49:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:09,371 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2684 transitions. [2021-06-05 04:49:09,371 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 04:49:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2684 transitions. [2021-06-05 04:49:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:09,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:09,372 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 04:49:09,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8192,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:09,573 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:09,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:09,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1149876226, now seen corresponding path program 653 times [2021-06-05 04:49:09,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:09,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106669676] [2021-06-05 04:49:09,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:09,674 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 04:49:09,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106669676] [2021-06-05 04:49:09,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106669676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452507776] [2021-06-05 04:49:09,675 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 04:49:09,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:49:09,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:09,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:09,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:10,061 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 6 treesize of output 4 [2021-06-05 04:49:10,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:10,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:10,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:10,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:10,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:10,083 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 04:49:10,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,085 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 04:49:10,086 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:10,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:10,099 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 04:49:10,099 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:6 [2021-06-05 04:49:10,156 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 04:49:10,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452507776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:10,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:10,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:10,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446473781] [2021-06-05 04:49:10,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:10,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:10,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:10,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:10,157 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 04:49:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:10,856 INFO L93 Difference]: Finished difference Result 1308 states and 4019 transitions. [2021-06-05 04:49:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:10,856 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 04:49:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:10,858 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 04:49:10,858 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 04:49:10,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 656.6ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:10,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 04:49:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 824. [2021-06-05 04:49:10,867 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 04:49:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2695 transitions. [2021-06-05 04:49:10,869 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2695 transitions. Word has length 22 [2021-06-05 04:49:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:10,869 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2695 transitions. [2021-06-05 04:49:10,869 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 04:49:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2695 transitions. [2021-06-05 04:49:10,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:10,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:10,870 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 04:49:11,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8207,678 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:11,070 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:11,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:11,070 INFO L82 PathProgramCache]: Analyzing trace with hash -344031496, now seen corresponding path program 654 times [2021-06-05 04:49:11,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:11,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228999462] [2021-06-05 04:49:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:11,169 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 04:49:11,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:11,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228999462] [2021-06-05 04:49:11,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228999462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:11,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018364433] [2021-06-05 04:49:11,169 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 04:49:11,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:49:11,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:11,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:11,528 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_327, v_prenex_323], 1=[nondet_0, v_prenex_324]} [2021-06-05 04:49:11,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:11,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:11,584 INFO L628 ElimStorePlain]: treesize reduction 49, result has 52.0 percent of original size [2021-06-05 04:49:11,586 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 04:49:11,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:11,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:11,608 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 5 treesize of output 3 [2021-06-05 04:49:11,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:11,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:11,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:11,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:11,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:11,627 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-06-05 04:49:11,629 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 04:49:11,629 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:108, output treesize:6 [2021-06-05 04:49:11,681 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 04:49:11,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018364433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:11,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:11,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:11,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580139612] [2021-06-05 04:49:11,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:11,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:11,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:11,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:11,682 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 04:49:12,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:12,380 INFO L93 Difference]: Finished difference Result 1265 states and 3916 transitions. [2021-06-05 04:49:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:12,380 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 04:49:12,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:12,382 INFO L225 Difference]: With dead ends: 1265 [2021-06-05 04:49:12,382 INFO L226 Difference]: Without dead ends: 1259 [2021-06-05 04:49:12,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 671.6ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-06-05 04:49:12,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 816. [2021-06-05 04:49:12,391 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 04:49:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2671 transitions. [2021-06-05 04:49:12,392 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2671 transitions. Word has length 22 [2021-06-05 04:49:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:12,392 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2671 transitions. [2021-06-05 04:49:12,392 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 04:49:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2671 transitions. [2021-06-05 04:49:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:12,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:12,393 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 04:49:12,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8226 [2021-06-05 04:49:12,594 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:12,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:12,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2050999482, now seen corresponding path program 655 times [2021-06-05 04:49:12,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:12,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160033573] [2021-06-05 04:49:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:12,710 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 04:49:12,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:12,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160033573] [2021-06-05 04:49:12,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160033573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:12,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127789092] [2021-06-05 04:49:12,710 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 04:49:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:12,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:12,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:13,206 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 04:49:13,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127789092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:13,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:13,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:13,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907270243] [2021-06-05 04:49:13,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:13,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:13,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:13,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:13,207 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 04:49:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:14,058 INFO L93 Difference]: Finished difference Result 1208 states and 3751 transitions. [2021-06-05 04:49:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:14,058 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 04:49:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:14,059 INFO L225 Difference]: With dead ends: 1208 [2021-06-05 04:49:14,060 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 04:49:14,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 842.5ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:14,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 04:49:14,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 822. [2021-06-05 04:49:14,069 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 04:49:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2693 transitions. [2021-06-05 04:49:14,070 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2693 transitions. Word has length 22 [2021-06-05 04:49:14,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:14,070 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2693 transitions. [2021-06-05 04:49:14,070 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 04:49:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2693 transitions. [2021-06-05 04:49:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:14,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:14,071 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 04:49:14,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 680 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8242 [2021-06-05 04:49:14,287 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:14,287 INFO L82 PathProgramCache]: Analyzing trace with hash 750060092, now seen corresponding path program 656 times [2021-06-05 04:49:14,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:14,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647789223] [2021-06-05 04:49:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:14,414 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 04:49:14,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:14,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647789223] [2021-06-05 04:49:14,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647789223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:14,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780942014] [2021-06-05 04:49:14,414 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 04:49:14,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:14,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:14,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:14,966 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 04:49:14,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780942014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:14,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:14,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:14,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608101365] [2021-06-05 04:49:14,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:14,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:14,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:14,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:14,967 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 04:49:15,582 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-06-05 04:49:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:15,787 INFO L93 Difference]: Finished difference Result 1214 states and 3758 transitions. [2021-06-05 04:49:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:15,787 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 04:49:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:15,789 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 04:49:15,789 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 04:49:15,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 851.7ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:15,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 04:49:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 819. [2021-06-05 04:49:15,798 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 04:49:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2682 transitions. [2021-06-05 04:49:15,800 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2682 transitions. Word has length 22 [2021-06-05 04:49:15,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:15,800 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2682 transitions. [2021-06-05 04:49:15,800 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 04:49:15,800 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2682 transitions. [2021-06-05 04:49:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:15,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:15,801 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 04:49:16,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8254,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:16,014 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:16,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:16,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1287915670, now seen corresponding path program 657 times [2021-06-05 04:49:16,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:16,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319333282] [2021-06-05 04:49:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:16,172 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 04:49:16,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:16,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319333282] [2021-06-05 04:49:16,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319333282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:16,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688860269] [2021-06-05 04:49:16,172 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 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 04:49:16,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:49:16,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:16,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:16,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:16,663 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 04:49:16,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688860269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:16,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:16,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:16,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761455382] [2021-06-05 04:49:16,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:16,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:16,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:16,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:16,664 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 04:49:17,348 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2021-06-05 04:49:17,537 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2021-06-05 04:49:17,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:17,625 INFO L93 Difference]: Finished difference Result 1172 states and 3663 transitions. [2021-06-05 04:49:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:17,625 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 04:49:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:17,627 INFO L225 Difference]: With dead ends: 1172 [2021-06-05 04:49:17,627 INFO L226 Difference]: Without dead ends: 1160 [2021-06-05 04:49:17,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 998.5ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:17,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-06-05 04:49:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 811. [2021-06-05 04:49:17,635 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 04:49:17,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2658 transitions. [2021-06-05 04:49:17,637 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2658 transitions. Word has length 22 [2021-06-05 04:49:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:17,637 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2658 transitions. [2021-06-05 04:49:17,637 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 04:49:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2658 transitions. [2021-06-05 04:49:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:17,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:17,638 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 04:49:17,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8272,682 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:17,838 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:17,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:17,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1801068674, now seen corresponding path program 658 times [2021-06-05 04:49:17,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:17,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470567735] [2021-06-05 04:49:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:17,950 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 04:49:17,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:17,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470567735] [2021-06-05 04:49:17,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470567735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:17,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135031161] [2021-06-05 04:49:17,950 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 04:49:18,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:18,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:18,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:18,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:18,465 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 04:49:18,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135031161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:18,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:18,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:18,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489507833] [2021-06-05 04:49:18,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:18,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:18,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:18,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:18,465 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 04:49:19,032 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2021-06-05 04:49:19,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:19,388 INFO L93 Difference]: Finished difference Result 1197 states and 3719 transitions. [2021-06-05 04:49:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:19,388 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 04:49:19,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:19,390 INFO L225 Difference]: With dead ends: 1197 [2021-06-05 04:49:19,390 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 04:49:19,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 905.5ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 04:49:19,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 820. [2021-06-05 04:49:19,398 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 04:49:19,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2691 transitions. [2021-06-05 04:49:19,400 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2691 transitions. Word has length 22 [2021-06-05 04:49:19,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:19,400 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2691 transitions. [2021-06-05 04:49:19,400 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 04:49:19,400 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2691 transitions. [2021-06-05 04:49:19,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:19,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:19,401 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 04:49:19,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8293 [2021-06-05 04:49:19,601 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:19,601 INFO L82 PathProgramCache]: Analyzing trace with hash 307160952, now seen corresponding path program 659 times [2021-06-05 04:49:19,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:19,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853570043] [2021-06-05 04:49:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:19,712 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 04:49:19,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:19,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853570043] [2021-06-05 04:49:19,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853570043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:19,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731599773] [2021-06-05 04:49:19,712 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 04:49:19,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:49:19,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:19,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:19,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:20,214 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 04:49:20,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731599773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:20,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:20,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:20,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545536368] [2021-06-05 04:49:20,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:20,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:20,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:20,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:20,215 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 04:49:20,751 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2021-06-05 04:49:21,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:21,083 INFO L93 Difference]: Finished difference Result 1203 states and 3726 transitions. [2021-06-05 04:49:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:21,083 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 04:49:21,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:21,084 INFO L225 Difference]: With dead ends: 1203 [2021-06-05 04:49:21,084 INFO L226 Difference]: Without dead ends: 1197 [2021-06-05 04:49:21,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 892.6ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-05 04:49:21,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 817. [2021-06-05 04:49:21,093 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 04:49:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2680 transitions. [2021-06-05 04:49:21,095 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2680 transitions. Word has length 22 [2021-06-05 04:49:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:21,095 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2680 transitions. [2021-06-05 04:49:21,095 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 04:49:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2680 transitions. [2021-06-05 04:49:21,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:21,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:21,096 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 04:49:21,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8305,684 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:21,296 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:21,297 INFO L82 PathProgramCache]: Analyzing trace with hash 845016530, now seen corresponding path program 660 times [2021-06-05 04:49:21,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:21,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650774178] [2021-06-05 04:49:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:21,424 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 04:49:21,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:21,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650774178] [2021-06-05 04:49:21,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650774178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:21,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183296331] [2021-06-05 04:49:21,424 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 04:49:21,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:49:21,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:21,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:21,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:21,951 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 04:49:21,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183296331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:21,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:21,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:21,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965928870] [2021-06-05 04:49:21,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:21,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:21,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:21,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:21,952 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 04:49:22,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:22,812 INFO L93 Difference]: Finished difference Result 1167 states and 3644 transitions. [2021-06-05 04:49:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:22,813 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 04:49:22,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:22,814 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 04:49:22,814 INFO L226 Difference]: Without dead ends: 1155 [2021-06-05 04:49:22,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 931.9ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:22,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-06-05 04:49:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 814. [2021-06-05 04:49:22,823 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 04:49:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2669 transitions. [2021-06-05 04:49:22,824 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2669 transitions. Word has length 22 [2021-06-05 04:49:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:22,824 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2669 transitions. [2021-06-05 04:49:22,824 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 04:49:22,824 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2669 transitions. [2021-06-05 04:49:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:22,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:22,825 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 04:49:23,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8319 [2021-06-05 04:49:23,026 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:23,026 INFO L82 PathProgramCache]: Analyzing trace with hash 338670264, now seen corresponding path program 661 times [2021-06-05 04:49:23,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:23,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451445251] [2021-06-05 04:49:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:23,128 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 04:49:23,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:23,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451445251] [2021-06-05 04:49:23,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451445251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:23,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454662251] [2021-06-05 04:49:23,128 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 04:49:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:23,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:23,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:23,616 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 04:49:23,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454662251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:23,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:23,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:23,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887373258] [2021-06-05 04:49:23,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:23,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:23,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:23,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:23,617 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 04:49:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:24,449 INFO L93 Difference]: Finished difference Result 1158 states and 3620 transitions. [2021-06-05 04:49:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:24,450 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 04:49:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:24,451 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 04:49:24,451 INFO L226 Difference]: Without dead ends: 1140 [2021-06-05 04:49:24,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 845.0ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-06-05 04:49:24,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 806. [2021-06-05 04:49:24,460 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 04:49:24,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2645 transitions. [2021-06-05 04:49:24,461 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2645 transitions. Word has length 22 [2021-06-05 04:49:24,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:24,461 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2645 transitions. [2021-06-05 04:49:24,461 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 04:49:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2645 transitions. [2021-06-05 04:49:24,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:24,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:24,462 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 04:49:24,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8332,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:24,663 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1633724579, now seen corresponding path program 662 times [2021-06-05 04:49:24,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:24,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299930578] [2021-06-05 04:49:24,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:24,760 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 04:49:24,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:24,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299930578] [2021-06-05 04:49:24,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299930578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:24,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312310851] [2021-06-05 04:49:24,760 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 04:49:24,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:24,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:24,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:24,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:24,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:24,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:24,961 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 13 treesize of output 9 [2021-06-05 04:49:24,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:24,974 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-06-05 04:49:24,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:49:24,975 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-06-05 04:49:25,017 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 04:49:25,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312310851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:25,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:25,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:49:25,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515445184] [2021-06-05 04:49:25,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:25,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:25,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:25,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:25,018 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 04:49:25,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:25,405 INFO L93 Difference]: Finished difference Result 1193 states and 3775 transitions. [2021-06-05 04:49:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:49:25,405 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 04:49:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:25,406 INFO L225 Difference]: With dead ends: 1193 [2021-06-05 04:49:25,406 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 04:49:25,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:49:25,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 04:49:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 813. [2021-06-05 04:49:25,415 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 04:49:25,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-06-05 04:49:25,417 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-06-05 04:49:25,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:25,417 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-06-05 04:49:25,417 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 04:49:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-06-05 04:49:25,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:25,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:25,418 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 04:49:25,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8345 [2021-06-05 04:49:25,618 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:25,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:25,618 INFO L82 PathProgramCache]: Analyzing trace with hash -407865598, now seen corresponding path program 663 times [2021-06-05 04:49:25,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:25,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156156768] [2021-06-05 04:49:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:25,753 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 04:49:25,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:25,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156156768] [2021-06-05 04:49:25,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156156768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:25,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181306382] [2021-06-05 04:49:25,754 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 04:49:25,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:49:25,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:25,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:25,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:26,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:26,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:26,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:26,157 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 04:49:26,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:26,159 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 12 treesize of output 8 [2021-06-05 04:49:26,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:26,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:26,165 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 04:49:26,166 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 04:49:26,215 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 04:49:26,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181306382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:26,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:26,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:26,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609269663] [2021-06-05 04:49:26,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:26,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:26,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:26,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:26,216 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 04:49:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:26,994 INFO L93 Difference]: Finished difference Result 1258 states and 3914 transitions. [2021-06-05 04:49:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:26,994 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 04:49:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:26,995 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 04:49:26,996 INFO L226 Difference]: Without dead ends: 1258 [2021-06-05 04:49:26,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:26,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-06-05 04:49:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 823. [2021-06-05 04:49:27,005 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 04:49:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2700 transitions. [2021-06-05 04:49:27,006 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2700 transitions. Word has length 22 [2021-06-05 04:49:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:27,006 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2700 transitions. [2021-06-05 04:49:27,006 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 04:49:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2700 transitions. [2021-06-05 04:49:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:27,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:27,007 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 04:49:27,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8350,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:27,217 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:27,217 INFO L82 PathProgramCache]: Analyzing trace with hash 750777932, now seen corresponding path program 664 times [2021-06-05 04:49:27,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:27,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193228738] [2021-06-05 04:49:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:27,336 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 04:49:27,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:27,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193228738] [2021-06-05 04:49:27,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193228738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:27,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754853477] [2021-06-05 04:49:27,337 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 04:49:27,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:27,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:27,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:27,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:27,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:27,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:27,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:27,735 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 04:49:27,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:27,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:27,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:27,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:27,743 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 04:49:27,743 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 04:49:27,795 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 04:49:27,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754853477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:27,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:27,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:27,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259160593] [2021-06-05 04:49:27,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:27,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:27,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:27,795 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 04:49:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:28,548 INFO L93 Difference]: Finished difference Result 1310 states and 4035 transitions. [2021-06-05 04:49:28,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:28,548 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 04:49:28,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:28,550 INFO L225 Difference]: With dead ends: 1310 [2021-06-05 04:49:28,550 INFO L226 Difference]: Without dead ends: 1310 [2021-06-05 04:49:28,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 697.7ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:28,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-06-05 04:49:28,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 826. [2021-06-05 04:49:28,559 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 04:49:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2711 transitions. [2021-06-05 04:49:28,561 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2711 transitions. Word has length 22 [2021-06-05 04:49:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:28,561 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2711 transitions. [2021-06-05 04:49:28,561 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 04:49:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2711 transitions. [2021-06-05 04:49:28,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:28,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:28,562 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 04:49:28,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 689 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8370 [2021-06-05 04:49:28,762 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:28,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:28,762 INFO L82 PathProgramCache]: Analyzing trace with hash -743129790, now seen corresponding path program 665 times [2021-06-05 04:49:28,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:28,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065145810] [2021-06-05 04:49:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:28,883 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 04:49:28,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:28,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065145810] [2021-06-05 04:49:28,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065145810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:28,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922647229] [2021-06-05 04:49:28,883 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 04:49:29,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:29,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:29,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:29,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:29,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:29,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:29,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:29,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:29,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:29,293 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 04:49:29,293 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:49:29,294 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 04:49:29,294 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 04:49:29,346 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 04:49:29,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922647229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:29,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:29,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:29,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632439735] [2021-06-05 04:49:29,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:29,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:29,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:29,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:29,346 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 04:49:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:30,052 INFO L93 Difference]: Finished difference Result 1267 states and 3932 transitions. [2021-06-05 04:49:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:30,053 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 04:49:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:30,054 INFO L225 Difference]: With dead ends: 1267 [2021-06-05 04:49:30,054 INFO L226 Difference]: Without dead ends: 1261 [2021-06-05 04:49:30,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 675.1ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-06-05 04:49:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 818. [2021-06-05 04:49:30,064 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 04:49:30,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2687 transitions. [2021-06-05 04:49:30,065 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2687 transitions. Word has length 22 [2021-06-05 04:49:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:30,065 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2687 transitions. [2021-06-05 04:49:30,065 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 04:49:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2687 transitions. [2021-06-05 04:49:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:30,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:30,066 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 04:49:30,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8392 [2021-06-05 04:49:30,266 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:30,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1844869520, now seen corresponding path program 666 times [2021-06-05 04:49:30,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:30,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075029045] [2021-06-05 04:49:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:30,413 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 04:49:30,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:30,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075029045] [2021-06-05 04:49:30,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075029045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:30,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326418148] [2021-06-05 04:49:30,414 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 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 04:49:30,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:49:30,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:30,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:30,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:30,916 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 04:49:30,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326418148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:30,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:30,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:30,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073869907] [2021-06-05 04:49:30,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:30,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:30,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:30,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:30,917 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 04:49:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:31,717 INFO L93 Difference]: Finished difference Result 1210 states and 3767 transitions. [2021-06-05 04:49:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:31,717 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 04:49:31,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:31,719 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 04:49:31,719 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 04:49:31,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 820.0ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 04:49:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 824. [2021-06-05 04:49:31,728 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 04:49:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2709 transitions. [2021-06-05 04:49:31,729 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2709 transitions. Word has length 22 [2021-06-05 04:49:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:31,729 INFO L482 AbstractCegarLoop]: Abstraction has 824 states and 2709 transitions. [2021-06-05 04:49:31,729 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 04:49:31,729 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2709 transitions. [2021-06-05 04:49:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:31,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:31,730 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 04:49:31,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 691 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8411 [2021-06-05 04:49:31,931 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:31,931 INFO L82 PathProgramCache]: Analyzing trace with hash 350961798, now seen corresponding path program 667 times [2021-06-05 04:49:31,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:31,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506549568] [2021-06-05 04:49:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:32,066 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 04:49:32,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:32,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506549568] [2021-06-05 04:49:32,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506549568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:32,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979757513] [2021-06-05 04:49:32,066 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 04:49:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:32,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:32,520 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 04:49:32,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979757513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:32,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:32,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:32,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995742113] [2021-06-05 04:49:32,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:32,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:32,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:32,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:32,521 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 04:49:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:33,311 INFO L93 Difference]: Finished difference Result 1216 states and 3774 transitions. [2021-06-05 04:49:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:33,311 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 04:49:33,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:33,313 INFO L225 Difference]: With dead ends: 1216 [2021-06-05 04:49:33,313 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 04:49:33,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 792.0ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:33,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 04:49:33,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 821. [2021-06-05 04:49:33,322 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 04:49:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2698 transitions. [2021-06-05 04:49:33,323 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2698 transitions. Word has length 22 [2021-06-05 04:49:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:33,324 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2698 transitions. [2021-06-05 04:49:33,324 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 04:49:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2698 transitions. [2021-06-05 04:49:33,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:33,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:33,325 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 04:49:33,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8425,692 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:33,525 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:33,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:33,525 INFO L82 PathProgramCache]: Analyzing trace with hash 888817376, now seen corresponding path program 668 times [2021-06-05 04:49:33,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:33,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852034929] [2021-06-05 04:49:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:33,674 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 04:49:33,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:33,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852034929] [2021-06-05 04:49:33,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852034929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:33,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228863527] [2021-06-05 04:49:33,674 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 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 04:49:33,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:33,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:33,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:33,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:34,163 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 04:49:34,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228863527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:34,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:34,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:34,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228671881] [2021-06-05 04:49:34,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:34,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:34,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:34,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:34,164 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 04:49:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:35,008 INFO L93 Difference]: Finished difference Result 1174 states and 3679 transitions. [2021-06-05 04:49:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:35,008 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 04:49:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:35,009 INFO L225 Difference]: With dead ends: 1174 [2021-06-05 04:49:35,009 INFO L226 Difference]: Without dead ends: 1162 [2021-06-05 04:49:35,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 866.1ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:35,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-06-05 04:49:35,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 813. [2021-06-05 04:49:35,018 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 04:49:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-06-05 04:49:35,019 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-06-05 04:49:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:35,019 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-06-05 04:49:35,019 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 04:49:35,019 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-06-05 04:49:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:35,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:35,020 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 04:49:35,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8440 [2021-06-05 04:49:35,221 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:35,221 INFO L82 PathProgramCache]: Analyzing trace with hash -875925571, now seen corresponding path program 669 times [2021-06-05 04:49:35,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:35,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874790881] [2021-06-05 04:49:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:35,296 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 04:49:35,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:35,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874790881] [2021-06-05 04:49:35,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874790881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:35,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485951709] [2021-06-05 04:49:35,296 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 04:49:35,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:49:35,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:35,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:49:35,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:35,471 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 04:49:35,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,473 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 04:49:35,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,476 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 13 treesize of output 9 [2021-06-05 04:49:35,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:35,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:35,483 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,485 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 5 treesize of output 3 [2021-06-05 04:49:35,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:35,488 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:35,513 INFO L628 ElimStorePlain]: treesize reduction 29, result has 49.1 percent of original size [2021-06-05 04:49:35,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:35,514 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:142, output treesize:28 [2021-06-05 04:49:35,574 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 04:49:35,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485951709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:35,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:35,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:49:35,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92808329] [2021-06-05 04:49:35,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:49:35,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:35,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:49:35,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:49:35,575 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 04:49:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:36,080 INFO L93 Difference]: Finished difference Result 1284 states and 4007 transitions. [2021-06-05 04:49:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:49:36,081 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 04:49:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:36,082 INFO L225 Difference]: With dead ends: 1284 [2021-06-05 04:49:36,082 INFO L226 Difference]: Without dead ends: 1223 [2021-06-05 04:49:36,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:49:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-06-05 04:49:36,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 820. [2021-06-05 04:49:36,091 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 04:49:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2710 transitions. [2021-06-05 04:49:36,093 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2710 transitions. Word has length 22 [2021-06-05 04:49:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:36,093 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2710 transitions. [2021-06-05 04:49:36,093 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 04:49:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2710 transitions. [2021-06-05 04:49:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:36,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:36,094 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 04:49:36,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8459,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:36,309 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:36,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:36,309 INFO L82 PathProgramCache]: Analyzing trace with hash 133449592, now seen corresponding path program 670 times [2021-06-05 04:49:36,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:36,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609958030] [2021-06-05 04:49:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:36,433 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 04:49:36,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:36,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609958030] [2021-06-05 04:49:36,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609958030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:36,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717254907] [2021-06-05 04:49:36,434 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 04:49:36,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:36,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:36,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:36,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:36,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:36,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:36,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:36,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:36,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,850 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-06-05 04:49:36,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:36,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:36,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:36,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:36,892 INFO L628 ElimStorePlain]: treesize reduction 13, result has 74.5 percent of original size [2021-06-05 04:49:36,892 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-06-05 04:49:36,893 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 04:49:36,893 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 04:49:36,998 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 04:49:36,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717254907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:36,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:36,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:36,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424503525] [2021-06-05 04:49:36,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:36,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:36,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:36,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:36,999 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 04:49:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:37,785 INFO L93 Difference]: Finished difference Result 1417 states and 4388 transitions. [2021-06-05 04:49:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:37,785 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 04:49:37,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:37,787 INFO L225 Difference]: With dead ends: 1417 [2021-06-05 04:49:37,787 INFO L226 Difference]: Without dead ends: 1417 [2021-06-05 04:49:37,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 728.9ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-06-05 04:49:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 832. [2021-06-05 04:49:37,798 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 04:49:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2751 transitions. [2021-06-05 04:49:37,799 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2751 transitions. Word has length 22 [2021-06-05 04:49:37,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:37,799 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2751 transitions. [2021-06-05 04:49:37,800 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 04:49:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2751 transitions. [2021-06-05 04:49:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:37,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:37,801 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 04:49:38,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 695 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8466 [2021-06-05 04:49:38,001 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:38,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1292093122, now seen corresponding path program 671 times [2021-06-05 04:49:38,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:38,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252853459] [2021-06-05 04:49:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:38,116 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 04:49:38,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:38,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252853459] [2021-06-05 04:49:38,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252853459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:38,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519326499] [2021-06-05 04:49:38,117 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 04:49:38,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:49:38,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:38,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:38,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:38,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,472 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:38,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,519 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-06-05 04:49:38,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:38,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:38,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:38,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:38,541 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:49:38,542 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 04:49:38,542 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 04:49:38,647 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 04:49:38,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519326499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:38,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:38,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:38,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380829270] [2021-06-05 04:49:38,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:38,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:38,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:38,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:38,647 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 04:49:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:39,430 INFO L93 Difference]: Finished difference Result 1449 states and 4447 transitions. [2021-06-05 04:49:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:39,431 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 04:49:39,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:39,432 INFO L225 Difference]: With dead ends: 1449 [2021-06-05 04:49:39,432 INFO L226 Difference]: Without dead ends: 1449 [2021-06-05 04:49:39,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 712.6ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-06-05 04:49:39,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 838. [2021-06-05 04:49:39,443 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 04:49:39,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2776 transitions. [2021-06-05 04:49:39,444 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2776 transitions. Word has length 22 [2021-06-05 04:49:39,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:39,444 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2776 transitions. [2021-06-05 04:49:39,444 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 04:49:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2776 transitions. [2021-06-05 04:49:39,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:39,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:39,445 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 04:49:39,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8486,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:39,646 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash -201814600, now seen corresponding path program 672 times [2021-06-05 04:49:39,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:39,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298928837] [2021-06-05 04:49:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:39,757 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 04:49:39,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:39,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298928837] [2021-06-05 04:49:39,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298928837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:39,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205740724] [2021-06-05 04:49:39,757 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 04:49:39,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:49:39,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:39,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:39,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:40,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:40,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:40,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:40,114 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 13 treesize of output 9 [2021-06-05 04:49:40,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:40,199 INFO L628 ElimStorePlain]: treesize reduction 48, result has 61.9 percent of original size [2021-06-05 04:49:40,202 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 04:49:40,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:40,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:40,234 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 5 treesize of output 3 [2021-06-05 04:49:40,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:40,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:40,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:40,238 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:40,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:40,265 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 04:49:40,265 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:144, output treesize:22 [2021-06-05 04:49:40,345 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 04:49:40,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205740724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:40,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:40,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:40,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298997660] [2021-06-05 04:49:40,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:40,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:40,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:40,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:40,346 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 04:49:41,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:41,095 INFO L93 Difference]: Finished difference Result 1406 states and 4338 transitions. [2021-06-05 04:49:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:41,095 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 04:49:41,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:41,097 INFO L225 Difference]: With dead ends: 1406 [2021-06-05 04:49:41,097 INFO L226 Difference]: Without dead ends: 1400 [2021-06-05 04:49:41,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 685.4ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-05 04:49:41,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 830. [2021-06-05 04:49:41,107 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 04:49:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2752 transitions. [2021-06-05 04:49:41,109 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2752 transitions. Word has length 22 [2021-06-05 04:49:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:41,109 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2752 transitions. [2021-06-05 04:49:41,109 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 04:49:41,109 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2752 transitions. [2021-06-05 04:49:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:41,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:41,110 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 04:49:41,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 697 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8511 [2021-06-05 04:49:41,310 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:41,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:41,310 INFO L82 PathProgramCache]: Analyzing trace with hash 543962077, now seen corresponding path program 673 times [2021-06-05 04:49:41,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:41,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114926765] [2021-06-05 04:49:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:41,377 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 04:49:41,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:41,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114926765] [2021-06-05 04:49:41,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114926765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:41,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571750023] [2021-06-05 04:49:41,377 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 04:49:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:41,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:41,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:41,580 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 04:49:41,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,583 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 04:49:41,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:41,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:41,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:41,605 INFO L628 ElimStorePlain]: treesize reduction 2, result has 90.9 percent of original size [2021-06-05 04:49:41,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:49:41,606 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:65, output treesize:20 [2021-06-05 04:49:41,664 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 04:49:41,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571750023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:41,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:41,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:49:41,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682594018] [2021-06-05 04:49:41,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:49:41,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:41,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:49:41,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:49:41,665 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 04:49:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:42,130 INFO L93 Difference]: Finished difference Result 1192 states and 3728 transitions. [2021-06-05 04:49:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:49:42,131 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 04:49:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:42,132 INFO L225 Difference]: With dead ends: 1192 [2021-06-05 04:49:42,132 INFO L226 Difference]: Without dead ends: 1108 [2021-06-05 04:49:42,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:49:42,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-05 04:49:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 810. [2021-06-05 04:49:42,141 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 04:49:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2661 transitions. [2021-06-05 04:49:42,142 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2661 transitions. Word has length 22 [2021-06-05 04:49:42,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:42,142 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2661 transitions. [2021-06-05 04:49:42,142 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 04:49:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2661 transitions. [2021-06-05 04:49:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:42,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:42,143 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 04:49:42,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8533,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:42,343 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:42,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1952026690, now seen corresponding path program 674 times [2021-06-05 04:49:42,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:42,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788941370] [2021-06-05 04:49:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:42,466 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 04:49:42,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:42,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788941370] [2021-06-05 04:49:42,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788941370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:42,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866825356] [2021-06-05 04:49:42,466 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 04:49:42,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:42,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:42,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:42,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:42,823 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 04:49:42,827 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 6 treesize of output 4 [2021-06-05 04:49:42,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:42,951 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 04:49:42,951 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-06-05 04:49:42,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:42,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:43,013 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 04:49:43,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:43,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:43,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:43,071 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 12 treesize of output 8 [2021-06-05 04:49:43,072 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:43,075 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:43,125 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:49:43,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:43,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:43,129 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 13 treesize of output 9 [2021-06-05 04:49:43,130 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:43,133 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:43,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:43,170 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 04:49:43,170 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 04:49:43,257 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 04:49:43,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866825356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:43,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:43,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:43,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305295868] [2021-06-05 04:49:43,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:43,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:43,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:43,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:43,258 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 04:49:44,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:44,070 INFO L93 Difference]: Finished difference Result 1340 states and 4171 transitions. [2021-06-05 04:49:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:44,070 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 04:49:44,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:44,072 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 04:49:44,072 INFO L226 Difference]: Without dead ends: 1340 [2021-06-05 04:49:44,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:44,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-05 04:49:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 806. [2021-06-05 04:49:44,086 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 04:49:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2643 transitions. [2021-06-05 04:49:44,088 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2643 transitions. Word has length 22 [2021-06-05 04:49:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:44,088 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2643 transitions. [2021-06-05 04:49:44,088 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 04:49:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2643 transitions. [2021-06-05 04:49:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:44,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:44,089 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 04:49:44,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8545 [2021-06-05 04:49:44,289 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:44,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:44,289 INFO L82 PathProgramCache]: Analyzing trace with hash -709889214, now seen corresponding path program 675 times [2021-06-05 04:49:44,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:44,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728307574] [2021-06-05 04:49:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:44,409 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 04:49:44,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:44,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728307574] [2021-06-05 04:49:44,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728307574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:44,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260335741] [2021-06-05 04:49:44,410 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 04:49:44,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:49:44,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:44,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:49:44,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:44,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:44,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:44,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:44,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:44,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:44,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:44,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:44,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:44,899 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:44,902 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:44,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:44,948 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 04:49:44,948 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:174, output treesize:61 [2021-06-05 04:49:45,118 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 04:49:45,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260335741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:45,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:45,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:49:45,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164705562] [2021-06-05 04:49:45,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:49:45,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:45,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:49:45,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:49:45,118 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 04:49:46,084 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-05 04:49:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:46,353 INFO L93 Difference]: Finished difference Result 1285 states and 4035 transitions. [2021-06-05 04:49:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:49:46,353 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 04:49:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:46,355 INFO L225 Difference]: With dead ends: 1285 [2021-06-05 04:49:46,355 INFO L226 Difference]: Without dead ends: 1264 [2021-06-05 04:49:46,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1165.5ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:49:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-06-05 04:49:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 800. [2021-06-05 04:49:46,364 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 04:49:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2619 transitions. [2021-06-05 04:49:46,365 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2619 transitions. Word has length 22 [2021-06-05 04:49:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:46,365 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2619 transitions. [2021-06-05 04:49:46,365 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 04:49:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2619 transitions. [2021-06-05 04:49:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:46,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:46,366 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 04:49:46,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8562 [2021-06-05 04:49:46,567 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:46,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:46,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1378076080, now seen corresponding path program 676 times [2021-06-05 04:49:46,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:46,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918674157] [2021-06-05 04:49:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:46,689 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 04:49:46,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:46,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918674157] [2021-06-05 04:49:46,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918674157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:46,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723200502] [2021-06-05 04:49:46,689 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 04:49:46,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:46,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:46,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:46,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:47,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:47,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:47,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:47,042 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 13 treesize of output 9 [2021-06-05 04:49:47,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:47,085 INFO L628 ElimStorePlain]: treesize reduction 61, result has 42.5 percent of original size [2021-06-05 04:49:47,085 INFO L518 ElimStorePlain]: Eliminatee v_prenex_440 vanished before elimination [2021-06-05 04:49:47,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:47,087 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 12 treesize of output 8 [2021-06-05 04:49:47,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:47,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:47,103 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 04:49:47,103 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 04:49:47,195 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 04:49:47,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723200502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:47,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:47,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:47,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108483183] [2021-06-05 04:49:47,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:47,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:47,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:47,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:47,196 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 04:49:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:48,037 INFO L93 Difference]: Finished difference Result 1364 states and 4234 transitions. [2021-06-05 04:49:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:48,037 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 04:49:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:48,039 INFO L225 Difference]: With dead ends: 1364 [2021-06-05 04:49:48,039 INFO L226 Difference]: Without dead ends: 1364 [2021-06-05 04:49:48,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 734.1ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-06-05 04:49:48,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 808. [2021-06-05 04:49:48,049 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 04:49:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2655 transitions. [2021-06-05 04:49:48,050 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2655 transitions. Word has length 22 [2021-06-05 04:49:48,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:48,050 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2655 transitions. [2021-06-05 04:49:48,050 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 04:49:48,050 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2655 transitions. [2021-06-05 04:49:48,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:48,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:48,051 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 04:49:48,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8579,701 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:48,252 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:48,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1422983494, now seen corresponding path program 677 times [2021-06-05 04:49:48,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:48,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318978419] [2021-06-05 04:49:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:48,395 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 04:49:48,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:48,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318978419] [2021-06-05 04:49:48,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318978419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:48,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934000543] [2021-06-05 04:49:48,395 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 04:49:48,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:49:48,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:48,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:48,757 INFO L446 ElimStorePlain]: Different costs {0=[nondet_0, v_prenex_445], 1=[v_prenex_448, v_prenex_450, v_prenex_446]} [2021-06-05 04:49:48,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:48,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,842 INFO L628 ElimStorePlain]: treesize reduction 72, result has 56.9 percent of original size [2021-06-05 04:49:48,845 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 6 treesize of output 4 [2021-06-05 04:49:48,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:48,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:48,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:48,915 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 6 treesize of output 4 [2021-06-05 04:49:48,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:48,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:48,920 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:48,961 INFO L628 ElimStorePlain]: treesize reduction 13, result has 79.7 percent of original size [2021-06-05 04:49:48,962 INFO L518 ElimStorePlain]: Eliminatee v_prenex_446 vanished before elimination [2021-06-05 04:49:48,963 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 04:49:48,963 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-06-05 04:49:49,054 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 04:49:49,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934000543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:49,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:49,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:49,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81187230] [2021-06-05 04:49:49,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:49,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:49,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:49,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:49,055 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 04:49:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:49,853 INFO L93 Difference]: Finished difference Result 1350 states and 4183 transitions. [2021-06-05 04:49:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:49,853 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 04:49:49,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:49,854 INFO L225 Difference]: With dead ends: 1350 [2021-06-05 04:49:49,854 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 04:49:49,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 748.0ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:49,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 04:49:49,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 805. [2021-06-05 04:49:49,864 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 04:49:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2644 transitions. [2021-06-05 04:49:49,865 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2644 transitions. Word has length 22 [2021-06-05 04:49:49,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:49,865 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2644 transitions. [2021-06-05 04:49:49,865 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 04:49:49,865 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2644 transitions. [2021-06-05 04:49:49,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:49,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:49,866 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 04:49:50,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8600,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:50,067 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:50,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:50,067 INFO L82 PathProgramCache]: Analyzing trace with hash -626675642, now seen corresponding path program 678 times [2021-06-05 04:49:50,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:50,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526965552] [2021-06-05 04:49:50,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:50,189 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 04:49:50,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:50,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526965552] [2021-06-05 04:49:50,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526965552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:50,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990452591] [2021-06-05 04:49:50,189 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 04:49:50,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:49:50,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:50,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:50,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:50,540 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_460, v_prenex_455], 1=[nondet_0, v_prenex_456, v_prenex_457]} [2021-06-05 04:49:50,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:50,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,627 INFO L628 ElimStorePlain]: treesize reduction 91, result has 49.4 percent of original size [2021-06-05 04:49:50,628 INFO L518 ElimStorePlain]: Eliminatee v_prenex_455 vanished before elimination [2021-06-05 04:49:50,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:50,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:50,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:50,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:49:50,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:50,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:49:50,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:50,711 INFO L628 ElimStorePlain]: treesize reduction 13, result has 79.7 percent of original size [2021-06-05 04:49:50,711 INFO L518 ElimStorePlain]: Eliminatee v_prenex_457 vanished before elimination [2021-06-05 04:49:50,712 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 04:49:50,712 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:186, output treesize:27 [2021-06-05 04:49:50,819 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 04:49:50,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990452591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:50,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:50,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:50,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49176795] [2021-06-05 04:49:50,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:50,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:50,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:50,820 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 04:49:51,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:51,854 INFO L93 Difference]: Finished difference Result 1393 states and 4296 transitions. [2021-06-05 04:49:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:49:51,854 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 04:49:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:51,856 INFO L225 Difference]: With dead ends: 1393 [2021-06-05 04:49:51,856 INFO L226 Difference]: Without dead ends: 1372 [2021-06-05 04:49:51,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 921.0ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:49:51,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-05 04:49:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 801. [2021-06-05 04:49:51,865 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 04:49:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2624 transitions. [2021-06-05 04:49:51,867 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2624 transitions. Word has length 22 [2021-06-05 04:49:51,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:51,867 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2624 transitions. [2021-06-05 04:49:51,867 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 04:49:51,867 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2624 transitions. [2021-06-05 04:49:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:51,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:51,868 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 04:49:52,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 703 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8619 [2021-06-05 04:49:52,068 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:52,068 INFO L82 PathProgramCache]: Analyzing trace with hash -605939114, now seen corresponding path program 679 times [2021-06-05 04:49:52,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:52,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72989905] [2021-06-05 04:49:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:52,190 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 04:49:52,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:52,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72989905] [2021-06-05 04:49:52,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72989905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:52,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016813192] [2021-06-05 04:49:52,190 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 04:49:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:52,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:52,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:52,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:52,543 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 13 treesize of output 9 [2021-06-05 04:49:52,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:52,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:49:52,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:52,584 INFO L628 ElimStorePlain]: treesize reduction 46, result has 49.5 percent of original size [2021-06-05 04:49:52,584 INFO L518 ElimStorePlain]: Eliminatee v_prenex_466 vanished before elimination [2021-06-05 04:49:52,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:49:52,586 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 12 treesize of output 8 [2021-06-05 04:49:52,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:49:52,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:49:52,602 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 04:49:52,602 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 04:49:52,695 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 04:49:52,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016813192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:52,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:52,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:52,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932319515] [2021-06-05 04:49:52,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:52,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:52,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:52,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:52,696 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 04:49:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:53,721 INFO L93 Difference]: Finished difference Result 1299 states and 4050 transitions. [2021-06-05 04:49:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:49:53,721 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 04:49:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:53,723 INFO L225 Difference]: With dead ends: 1299 [2021-06-05 04:49:53,723 INFO L226 Difference]: Without dead ends: 1272 [2021-06-05 04:49:53,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 905.8ms TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:49:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-05 04:49:53,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 803. [2021-06-05 04:49:53,732 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 04:49:53,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2629 transitions. [2021-06-05 04:49:53,733 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2629 transitions. Word has length 22 [2021-06-05 04:49:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:53,734 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2629 transitions. [2021-06-05 04:49:53,734 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 04:49:53,734 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2629 transitions. [2021-06-05 04:49:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:53,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:53,735 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 04:49:53,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8638,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:49:53,935 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:53,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:53,935 INFO L82 PathProgramCache]: Analyzing trace with hash 674002882, now seen corresponding path program 680 times [2021-06-05 04:49:53,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:53,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699311075] [2021-06-05 04:49:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:54,091 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 04:49:54,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:54,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699311075] [2021-06-05 04:49:54,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699311075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:54,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106902993] [2021-06-05 04:49:54,091 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 04:49:54,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:49:54,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:54,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:54,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:54,658 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 04:49:54,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106902993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:54,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:54,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:54,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114097766] [2021-06-05 04:49:54,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:54,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:54,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:54,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:54,659 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 04:49:55,251 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2021-06-05 04:49:55,436 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 95 [2021-06-05 04:49:55,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:55,665 INFO L93 Difference]: Finished difference Result 1217 states and 3816 transitions. [2021-06-05 04:49:55,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:55,665 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 04:49:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:55,666 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 04:49:55,666 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 04:49:55,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1029.0ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:55,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 04:49:55,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 810. [2021-06-05 04:49:55,675 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 04:49:55,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2656 transitions. [2021-06-05 04:49:55,677 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2656 transitions. Word has length 22 [2021-06-05 04:49:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:55,677 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2656 transitions. [2021-06-05 04:49:55,677 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 04:49:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2656 transitions. [2021-06-05 04:49:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:55,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:55,678 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 04:49:55,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8663 [2021-06-05 04:49:55,878 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash -819904840, now seen corresponding path program 681 times [2021-06-05 04:49:55,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:55,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070865510] [2021-06-05 04:49:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:56,030 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 04:49:56,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:56,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070865510] [2021-06-05 04:49:56,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070865510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:56,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337603544] [2021-06-05 04:49:56,030 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 04:49:56,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:49:56,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:56,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:56,561 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 04:49:56,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337603544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:56,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:56,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:56,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724406113] [2021-06-05 04:49:56,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:56,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:56,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:56,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:56,562 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 04:49:57,143 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 04:49:57,459 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-06-05 04:49:57,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:57,676 INFO L93 Difference]: Finished difference Result 1223 states and 3823 transitions. [2021-06-05 04:49:57,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:57,677 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 04:49:57,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:57,678 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 04:49:57,678 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 04:49:57,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1115.1ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:57,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 04:49:57,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 807. [2021-06-05 04:49:57,687 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 04:49:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2645 transitions. [2021-06-05 04:49:57,689 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2645 transitions. Word has length 22 [2021-06-05 04:49:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:57,689 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2645 transitions. [2021-06-05 04:49:57,689 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 04:49:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2645 transitions. [2021-06-05 04:49:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:57,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:57,690 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 04:49:57,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 706 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8676 [2021-06-05 04:49:57,890 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:57,890 INFO L82 PathProgramCache]: Analyzing trace with hash -282049262, now seen corresponding path program 682 times [2021-06-05 04:49:57,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:57,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068156844] [2021-06-05 04:49:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:49:58,063 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 04:49:58,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:49:58,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068156844] [2021-06-05 04:49:58,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068156844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:58,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611260474] [2021-06-05 04:49:58,064 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 04:49:58,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:49:58,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:49:58,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:49:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:49:58,646 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 04:49:58,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611260474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:49:58,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:49:58,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:49:58,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803956921] [2021-06-05 04:49:58,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:49:58,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:49:58,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:49:58,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:49:58,647 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 04:49:59,230 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 94 [2021-06-05 04:49:59,467 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2021-06-05 04:49:59,640 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 55 [2021-06-05 04:49:59,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:49:59,726 INFO L93 Difference]: Finished difference Result 1187 states and 3741 transitions. [2021-06-05 04:49:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:49:59,726 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 04:49:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:49:59,728 INFO L225 Difference]: With dead ends: 1187 [2021-06-05 04:49:59,728 INFO L226 Difference]: Without dead ends: 1175 [2021-06-05 04:49:59,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1172.7ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:49:59,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-05 04:49:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 804. [2021-06-05 04:49:59,737 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 04:49:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2634 transitions. [2021-06-05 04:49:59,738 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2634 transitions. Word has length 22 [2021-06-05 04:49:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:49:59,738 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2634 transitions. [2021-06-05 04:49:59,738 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 04:49:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2634 transitions. [2021-06-05 04:49:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:49:59,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:49:59,739 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 04:49:59,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8698 [2021-06-05 04:49:59,939 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:49:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:49:59,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1802387316, now seen corresponding path program 683 times [2021-06-05 04:49:59,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:49:59,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151100434] [2021-06-05 04:49:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:49:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:00,088 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 04:50:00,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:00,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151100434] [2021-06-05 04:50:00,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151100434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:00,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373740252] [2021-06-05 04:50:00,088 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 04:50:00,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:50:00,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:00,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:00,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:00,564 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 04:50:00,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:00,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:50:00,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:00,649 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 04:50:00,649 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:50:00,650 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 04:50:00,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:50:00,722 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 04:50:00,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373740252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:00,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:00,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:00,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814683096] [2021-06-05 04:50:00,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:00,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:00,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:00,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:00,723 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 04:50:01,300 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2021-06-05 04:50:01,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:01,679 INFO L93 Difference]: Finished difference Result 1301 states and 4026 transitions. [2021-06-05 04:50:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:01,679 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 04:50:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:01,681 INFO L225 Difference]: With dead ends: 1301 [2021-06-05 04:50:01,681 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 04:50:01,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 995.6ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 04:50:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 812. [2021-06-05 04:50:01,691 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 04:50:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2670 transitions. [2021-06-05 04:50:01,692 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2670 transitions. Word has length 22 [2021-06-05 04:50:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:01,692 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2670 transitions. [2021-06-05 04:50:01,693 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 04:50:01,693 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2670 transitions. [2021-06-05 04:50:01,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:01,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:01,693 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 04:50:01,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8717,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:01,894 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:01,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:01,894 INFO L82 PathProgramCache]: Analyzing trace with hash 998672258, now seen corresponding path program 684 times [2021-06-05 04:50:01,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:01,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658928520] [2021-06-05 04:50:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:02,033 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 04:50:02,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:02,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658928520] [2021-06-05 04:50:02,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658928520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:02,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942669518] [2021-06-05 04:50:02,034 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 04:50:02,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:50:02,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:02,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:02,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:50:02,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:02,560 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 04:50:02,560 INFO L518 ElimStorePlain]: Eliminatee v_prenex_501 vanished before elimination [2021-06-05 04:50:02,561 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 04:50:02,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:50:02,634 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 04:50:02,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942669518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:02,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:02,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:02,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458248858] [2021-06-05 04:50:02,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:02,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:02,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:02,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:02,634 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 04:50:03,226 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-05 04:50:03,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:03,614 INFO L93 Difference]: Finished difference Result 1307 states and 4027 transitions. [2021-06-05 04:50:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:03,614 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 04:50:03,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:03,616 INFO L225 Difference]: With dead ends: 1307 [2021-06-05 04:50:03,616 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 04:50:03,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 956.9ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:03,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 04:50:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 809. [2021-06-05 04:50:03,626 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 04:50:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2659 transitions. [2021-06-05 04:50:03,627 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2659 transitions. Word has length 22 [2021-06-05 04:50:03,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:03,627 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2659 transitions. [2021-06-05 04:50:03,627 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 04:50:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2659 transitions. [2021-06-05 04:50:03,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:03,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:03,628 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 04:50:03,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 709 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8732 [2021-06-05 04:50:03,829 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:03,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:03,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1050986878, now seen corresponding path program 685 times [2021-06-05 04:50:03,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:03,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058191509] [2021-06-05 04:50:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:04,001 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 04:50:04,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:04,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058191509] [2021-06-05 04:50:04,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058191509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:04,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193667818] [2021-06-05 04:50:04,001 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 04:50:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:04,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:04,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:50:04,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:04,539 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:50:04,539 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:50:04,540 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 04:50:04,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:50:04,615 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 04:50:04,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193667818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:04,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:04,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:04,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359327806] [2021-06-05 04:50:04,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:04,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:04,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:04,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:04,616 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 04:50:05,204 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2021-06-05 04:50:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:05,817 INFO L93 Difference]: Finished difference Result 1296 states and 4011 transitions. [2021-06-05 04:50:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:50:05,818 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 04:50:05,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:05,820 INFO L225 Difference]: With dead ends: 1296 [2021-06-05 04:50:05,820 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 04:50:05,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1117.3ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:50:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 04:50:05,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 805. [2021-06-05 04:50:05,830 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 04:50:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2639 transitions. [2021-06-05 04:50:05,831 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2639 transitions. Word has length 22 [2021-06-05 04:50:05,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:05,831 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2639 transitions. [2021-06-05 04:50:05,831 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 04:50:05,831 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2639 transitions. [2021-06-05 04:50:05,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:05,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:05,832 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 04:50:06,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8750,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:06,033 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:06,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:06,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1030250350, now seen corresponding path program 686 times [2021-06-05 04:50:06,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:06,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082838084] [2021-06-05 04:50:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:06,202 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 04:50:06,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:06,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082838084] [2021-06-05 04:50:06,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082838084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:06,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619542416] [2021-06-05 04:50:06,203 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 04:50:06,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:06,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:06,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:06,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:06,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:50:06,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:06,709 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:50:06,709 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:50:06,710 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 04:50:06,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:50:06,792 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 04:50:06,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619542416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:06,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:06,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:06,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897966700] [2021-06-05 04:50:06,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:06,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:06,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:06,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:06,793 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 04:50:07,427 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 04:50:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:07,861 INFO L93 Difference]: Finished difference Result 1252 states and 3909 transitions. [2021-06-05 04:50:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:50:07,861 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 04:50:07,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:07,863 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 04:50:07,863 INFO L226 Difference]: Without dead ends: 1246 [2021-06-05 04:50:07,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1029.8ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:50:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-06-05 04:50:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 804. [2021-06-05 04:50:07,872 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 04:50:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2634 transitions. [2021-06-05 04:50:07,873 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2634 transitions. Word has length 22 [2021-06-05 04:50:07,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:07,873 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2634 transitions. [2021-06-05 04:50:07,873 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 04:50:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2634 transitions. [2021-06-05 04:50:07,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:07,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:07,874 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 04:50:08,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8767,711 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:08,075 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:08,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:08,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1245859330, now seen corresponding path program 687 times [2021-06-05 04:50:08,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:08,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604394662] [2021-06-05 04:50:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:08,266 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 04:50:08,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:08,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604394662] [2021-06-05 04:50:08,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604394662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:08,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595484581] [2021-06-05 04:50:08,266 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 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 04:50:08,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:50:08,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:08,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:08,767 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 04:50:08,932 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 04:50:08,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595484581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:08,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:08,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:08,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198825505] [2021-06-05 04:50:08,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:08,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:08,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:08,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:08,933 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 04:50:09,603 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2021-06-05 04:50:09,846 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 84 [2021-06-05 04:50:10,018 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 63 [2021-06-05 04:50:10,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:10,106 INFO L93 Difference]: Finished difference Result 1178 states and 3717 transitions. [2021-06-05 04:50:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:10,107 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 04:50:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:10,108 INFO L225 Difference]: With dead ends: 1178 [2021-06-05 04:50:10,108 INFO L226 Difference]: Without dead ends: 1166 [2021-06-05 04:50:10,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1290.3ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-06-05 04:50:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 806. [2021-06-05 04:50:10,117 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 04:50:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2639 transitions. [2021-06-05 04:50:10,119 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2639 transitions. Word has length 22 [2021-06-05 04:50:10,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:10,119 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2639 transitions. [2021-06-05 04:50:10,119 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 04:50:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2639 transitions. [2021-06-05 04:50:10,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:10,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:10,120 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 04:50:10,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8788 [2021-06-05 04:50:10,320 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:10,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:10,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1997259768, now seen corresponding path program 688 times [2021-06-05 04:50:10,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:10,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393810582] [2021-06-05 04:50:10,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:10,483 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 04:50:10,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:10,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393810582] [2021-06-05 04:50:10,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393810582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:10,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614412531] [2021-06-05 04:50:10,483 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 04:50:10,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:10,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:10,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:10,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:10,962 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 04:50:11,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:11,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:50:11,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:11,086 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 04:50:11,086 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:50:11,087 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 04:50:11,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 04:50:11,129 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 04:50:11,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614412531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:11,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:11,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:11,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916263239] [2021-06-05 04:50:11,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:11,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:11,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:11,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:11,130 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 04:50:11,714 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-06-05 04:50:11,928 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-06-05 04:50:12,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:12,281 INFO L93 Difference]: Finished difference Result 1201 states and 3767 transitions. [2021-06-05 04:50:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:50:12,281 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 04:50:12,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:12,283 INFO L225 Difference]: With dead ends: 1201 [2021-06-05 04:50:12,283 INFO L226 Difference]: Without dead ends: 1174 [2021-06-05 04:50:12,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1241.9ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:50:12,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-06-05 04:50:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 806. [2021-06-05 04:50:12,292 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 04:50:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2639 transitions. [2021-06-05 04:50:12,293 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2639 transitions. Word has length 22 [2021-06-05 04:50:12,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:12,293 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2639 transitions. [2021-06-05 04:50:12,293 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 04:50:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2639 transitions. [2021-06-05 04:50:12,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:12,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:12,294 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 04:50:12,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8806,713 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:12,494 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:12,495 INFO L82 PathProgramCache]: Analyzing trace with hash -136058736, now seen corresponding path program 689 times [2021-06-05 04:50:12,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:12,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027304843] [2021-06-05 04:50:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:12,647 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 04:50:12,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:12,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027304843] [2021-06-05 04:50:12,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027304843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:12,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188904549] [2021-06-05 04:50:12,647 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 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 04:50:12,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:50:12,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:12,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:12,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:13,231 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 04:50:13,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188904549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:13,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:13,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:13,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091167239] [2021-06-05 04:50:13,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:13,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:13,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:13,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:13,232 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 04:50:13,761 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-06-05 04:50:14,006 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 90 [2021-06-05 04:50:14,193 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-05 04:50:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:14,410 INFO L93 Difference]: Finished difference Result 1214 states and 3807 transitions. [2021-06-05 04:50:14,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:14,411 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 04:50:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:14,412 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 04:50:14,412 INFO L226 Difference]: Without dead ends: 1214 [2021-06-05 04:50:14,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1163.8ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:14,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-06-05 04:50:14,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 816. [2021-06-05 04:50:14,421 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 04:50:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2677 transitions. [2021-06-05 04:50:14,422 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2677 transitions. Word has length 22 [2021-06-05 04:50:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:14,422 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2677 transitions. [2021-06-05 04:50:14,422 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 04:50:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2677 transitions. [2021-06-05 04:50:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:14,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:14,423 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 04:50:14,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 714 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8838 [2021-06-05 04:50:14,624 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1629966458, now seen corresponding path program 690 times [2021-06-05 04:50:14,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:14,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144667493] [2021-06-05 04:50:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:14,747 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 04:50:14,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:14,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144667493] [2021-06-05 04:50:14,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144667493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:14,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622594473] [2021-06-05 04:50:14,747 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 04:50:14,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:50:14,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:14,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:14,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:15,344 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 04:50:15,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622594473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:15,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:15,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:15,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131006393] [2021-06-05 04:50:15,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:15,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:15,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:15,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:15,345 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 04:50:15,823 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-06-05 04:50:16,021 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-06-05 04:50:16,190 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-06-05 04:50:16,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:16,404 INFO L93 Difference]: Finished difference Result 1220 states and 3814 transitions. [2021-06-05 04:50:16,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:16,404 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 04:50:16,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:16,406 INFO L225 Difference]: With dead ends: 1220 [2021-06-05 04:50:16,406 INFO L226 Difference]: Without dead ends: 1214 [2021-06-05 04:50:16,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1101.7ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-06-05 04:50:16,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 813. [2021-06-05 04:50:16,415 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 04:50:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2666 transitions. [2021-06-05 04:50:16,416 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2666 transitions. Word has length 22 [2021-06-05 04:50:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:16,417 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2666 transitions. [2021-06-05 04:50:16,417 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 04:50:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2666 transitions. [2021-06-05 04:50:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:16,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:16,418 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 04:50:16,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 715 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8853 [2021-06-05 04:50:16,618 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:16,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:16,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1092110880, now seen corresponding path program 691 times [2021-06-05 04:50:16,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:16,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230179955] [2021-06-05 04:50:16,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:16,749 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 04:50:16,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:16,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230179955] [2021-06-05 04:50:16,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230179955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:16,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616661085] [2021-06-05 04:50:16,749 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 04:50:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:16,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:16,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:17,344 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 04:50:17,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616661085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:17,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:17,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:17,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122324967] [2021-06-05 04:50:17,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:17,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:17,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:17,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:17,344 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 04:50:17,824 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-05 04:50:18,019 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2021-06-05 04:50:18,192 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-05 04:50:18,353 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-05 04:50:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:18,440 INFO L93 Difference]: Finished difference Result 1184 states and 3732 transitions. [2021-06-05 04:50:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:18,440 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 04:50:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:18,442 INFO L225 Difference]: With dead ends: 1184 [2021-06-05 04:50:18,442 INFO L226 Difference]: Without dead ends: 1172 [2021-06-05 04:50:18,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1142.1ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:18,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-06-05 04:50:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 810. [2021-06-05 04:50:18,450 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 04:50:18,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2655 transitions. [2021-06-05 04:50:18,452 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2655 transitions. Word has length 22 [2021-06-05 04:50:18,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:18,452 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2655 transitions. [2021-06-05 04:50:18,452 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 04:50:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2655 transitions. [2021-06-05 04:50:18,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:18,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:18,453 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 04:50:18,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 716 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8870 [2021-06-05 04:50:18,653 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:18,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1598457146, now seen corresponding path program 692 times [2021-06-05 04:50:18,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:18,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856249493] [2021-06-05 04:50:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:18,781 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 04:50:18,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:18,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856249493] [2021-06-05 04:50:18,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856249493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:18,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629029268] [2021-06-05 04:50:18,781 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 04:50:18,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:18,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:18,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:18,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:19,350 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 04:50:19,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629029268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:19,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:19,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:19,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671799863] [2021-06-05 04:50:19,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:19,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:19,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:19,350 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 04:50:19,937 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-06-05 04:50:20,129 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 82 [2021-06-05 04:50:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:20,474 INFO L93 Difference]: Finished difference Result 1181 states and 3721 transitions. [2021-06-05 04:50:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:20,474 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 04:50:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:20,476 INFO L225 Difference]: With dead ends: 1181 [2021-06-05 04:50:20,476 INFO L226 Difference]: Without dead ends: 1163 [2021-06-05 04:50:20,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1088.2ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-05 04:50:20,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 807. [2021-06-05 04:50:20,485 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 04:50:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2644 transitions. [2021-06-05 04:50:20,486 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2644 transitions. Word has length 22 [2021-06-05 04:50:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:20,486 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2644 transitions. [2021-06-05 04:50:20,486 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 04:50:20,486 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2644 transitions. [2021-06-05 04:50:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:20,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:20,487 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 04:50:20,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8893,717 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:20,687 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:20,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:20,688 INFO L82 PathProgramCache]: Analyzing trace with hash 405256454, now seen corresponding path program 693 times [2021-06-05 04:50:20,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:20,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612903737] [2021-06-05 04:50:20,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:20,839 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 04:50:20,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:20,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612903737] [2021-06-05 04:50:20,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612903737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:20,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35203694] [2021-06-05 04:50:20,840 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 04:50:20,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:50:20,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:20,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:20,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:21,239 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-06-05 04:50:21,485 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 04:50:21,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35203694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:21,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:21,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:21,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172203805] [2021-06-05 04:50:21,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:21,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:21,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:21,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:21,486 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 04:50:21,935 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 82 [2021-06-05 04:50:22,143 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-06-05 04:50:22,378 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 69 [2021-06-05 04:50:22,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:22,603 INFO L93 Difference]: Finished difference Result 1223 states and 3829 transitions. [2021-06-05 04:50:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:22,603 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 04:50:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:22,605 INFO L225 Difference]: With dead ends: 1223 [2021-06-05 04:50:22,605 INFO L226 Difference]: Without dead ends: 1223 [2021-06-05 04:50:22,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1231.7ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:22,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-06-05 04:50:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 814. [2021-06-05 04:50:22,619 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 04:50:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2671 transitions. [2021-06-05 04:50:22,620 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2671 transitions. Word has length 22 [2021-06-05 04:50:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:22,620 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2671 transitions. [2021-06-05 04:50:22,620 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 04:50:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2671 transitions. [2021-06-05 04:50:22,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:22,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:22,621 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 04:50:22,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8911,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:22,822 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:22,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1088651268, now seen corresponding path program 694 times [2021-06-05 04:50:22,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:22,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968478748] [2021-06-05 04:50:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:22,965 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 04:50:22,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:22,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968478748] [2021-06-05 04:50:22,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968478748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:22,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553636290] [2021-06-05 04:50:22,965 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 04:50:23,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:23,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:23,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:23,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:23,398 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 04:50:23,643 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 04:50:23,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553636290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:23,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:23,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:23,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708272153] [2021-06-05 04:50:23,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:23,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:23,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:23,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:23,644 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 04:50:24,108 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-05 04:50:24,314 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2021-06-05 04:50:24,497 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 78 [2021-06-05 04:50:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:24,716 INFO L93 Difference]: Finished difference Result 1229 states and 3836 transitions. [2021-06-05 04:50:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:24,716 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 04:50:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:24,718 INFO L225 Difference]: With dead ends: 1229 [2021-06-05 04:50:24,718 INFO L226 Difference]: Without dead ends: 1223 [2021-06-05 04:50:24,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1217.3ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:24,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-06-05 04:50:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 811. [2021-06-05 04:50:24,727 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 04:50:24,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2660 transitions. [2021-06-05 04:50:24,729 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2660 transitions. Word has length 22 [2021-06-05 04:50:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:24,729 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2660 transitions. [2021-06-05 04:50:24,729 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 04:50:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2660 transitions. [2021-06-05 04:50:24,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:24,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:24,730 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 04:50:24,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8928 [2021-06-05 04:50:24,930 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:24,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:24,930 INFO L82 PathProgramCache]: Analyzing trace with hash -550795690, now seen corresponding path program 695 times [2021-06-05 04:50:24,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:24,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130063438] [2021-06-05 04:50:24,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:25,084 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 04:50:25,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:25,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130063438] [2021-06-05 04:50:25,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130063438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:25,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550956198] [2021-06-05 04:50:25,085 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 04:50:25,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:25,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:25,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:25,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:25,532 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 04:50:25,784 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 04:50:25,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550956198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:25,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:25,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:25,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223088707] [2021-06-05 04:50:25,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:25,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:25,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:25,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:25,785 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 04:50:26,254 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-06-05 04:50:26,463 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-06-05 04:50:26,654 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 75 [2021-06-05 04:50:26,829 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 54 [2021-06-05 04:50:26,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:26,913 INFO L93 Difference]: Finished difference Result 1193 states and 3754 transitions. [2021-06-05 04:50:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:26,913 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 04:50:26,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:26,915 INFO L225 Difference]: With dead ends: 1193 [2021-06-05 04:50:26,915 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 04:50:26,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1299.4ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:26,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 04:50:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 808. [2021-06-05 04:50:26,924 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 04:50:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2649 transitions. [2021-06-05 04:50:26,925 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2649 transitions. Word has length 22 [2021-06-05 04:50:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:26,925 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2649 transitions. [2021-06-05 04:50:26,925 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 04:50:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2649 transitions. [2021-06-05 04:50:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:26,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:26,926 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 04:50:27,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8949,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:27,126 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:27,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:27,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2071133744, now seen corresponding path program 696 times [2021-06-05 04:50:27,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:27,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959846100] [2021-06-05 04:50:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:27,258 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 04:50:27,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:27,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959846100] [2021-06-05 04:50:27,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959846100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:27,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503347388] [2021-06-05 04:50:27,258 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 04:50:27,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:50:27,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:27,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:27,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:27,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:27,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:50:27,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:27,795 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 04:50:27,796 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:50:27,796 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 04:50:27,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:50:27,874 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 04:50:27,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503347388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:27,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:27,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:27,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799468847] [2021-06-05 04:50:27,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:27,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:27,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:27,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:27,875 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 04:50:28,315 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-06-05 04:50:28,526 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-06-05 04:50:28,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:28,881 INFO L93 Difference]: Finished difference Result 1301 states and 4026 transitions. [2021-06-05 04:50:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:28,881 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 04:50:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:28,883 INFO L225 Difference]: With dead ends: 1301 [2021-06-05 04:50:28,883 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 04:50:28,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1069.4ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 04:50:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 816. [2021-06-05 04:50:28,893 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 04:50:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2685 transitions. [2021-06-05 04:50:28,894 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2685 transitions. Word has length 22 [2021-06-05 04:50:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:28,894 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2685 transitions. [2021-06-05 04:50:28,894 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 04:50:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2685 transitions. [2021-06-05 04:50:28,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:28,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:28,895 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 04:50:29,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8967,721 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:29,095 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:29,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:29,095 INFO L82 PathProgramCache]: Analyzing trace with hash 729925830, now seen corresponding path program 697 times [2021-06-05 04:50:29,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:29,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673057389] [2021-06-05 04:50:29,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:29,228 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 04:50:29,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:29,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673057389] [2021-06-05 04:50:29,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673057389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:29,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129460691] [2021-06-05 04:50:29,229 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 04:50:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:29,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:29,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:29,684 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 04:50:29,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:29,814 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 8 treesize of output 1 [2021-06-05 04:50:29,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:29,844 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 04:50:29,844 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:50:29,845 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 04:50:29,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:50:29,934 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 04:50:29,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129460691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:29,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:29,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:29,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90787867] [2021-06-05 04:50:29,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:29,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:29,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:29,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:29,935 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 04:50:30,351 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 04:50:30,546 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-06-05 04:50:30,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:30,899 INFO L93 Difference]: Finished difference Result 1307 states and 4027 transitions. [2021-06-05 04:50:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:30,900 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 04:50:30,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:30,901 INFO L225 Difference]: With dead ends: 1307 [2021-06-05 04:50:30,901 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 04:50:30,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1128.3ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:30,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 04:50:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 813. [2021-06-05 04:50:30,911 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 04:50:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2674 transitions. [2021-06-05 04:50:30,912 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2674 transitions. Word has length 22 [2021-06-05 04:50:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:30,912 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2674 transitions. [2021-06-05 04:50:30,912 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 04:50:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2674 transitions. [2021-06-05 04:50:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:30,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:30,913 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 04:50:31,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 722 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8983 [2021-06-05 04:50:31,114 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:31,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1319733306, now seen corresponding path program 698 times [2021-06-05 04:50:31,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:31,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266845637] [2021-06-05 04:50:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:31,258 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 04:50:31,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:31,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266845637] [2021-06-05 04:50:31,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266845637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:31,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154754479] [2021-06-05 04:50:31,258 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 04:50:31,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:31,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:31,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:31,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:31,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:31,758 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 8 treesize of output 1 [2021-06-05 04:50:31,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:31,789 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 04:50:31,789 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:50:31,789 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 04:50:31,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:50:31,868 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 04:50:31,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154754479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:31,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:31,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:31,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117044864] [2021-06-05 04:50:31,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:31,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:31,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:31,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:31,868 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 04:50:32,341 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2021-06-05 04:50:32,540 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 86 [2021-06-05 04:50:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:33,092 INFO L93 Difference]: Finished difference Result 1296 states and 4011 transitions. [2021-06-05 04:50:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:50:33,092 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 04:50:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:33,094 INFO L225 Difference]: With dead ends: 1296 [2021-06-05 04:50:33,094 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 04:50:33,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1227.1ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:50:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 04:50:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 809. [2021-06-05 04:50:33,103 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 04:50:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2654 transitions. [2021-06-05 04:50:33,104 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2654 transitions. Word has length 22 [2021-06-05 04:50:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:33,104 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 2654 transitions. [2021-06-05 04:50:33,104 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 04:50:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2654 transitions. [2021-06-05 04:50:33,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:33,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:33,105 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 04:50:33,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 723 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9007 [2021-06-05 04:50:33,306 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:33,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:33,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1298996778, now seen corresponding path program 699 times [2021-06-05 04:50:33,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:33,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187153332] [2021-06-05 04:50:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:33,456 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 04:50:33,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:33,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187153332] [2021-06-05 04:50:33,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187153332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:33,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20431306] [2021-06-05 04:50:33,457 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 04:50:33,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:50:33,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:33,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:50:33,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:34,165 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 04:50:34,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:50:34,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,298 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 04:50:34,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:34,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:50:34,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,428 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 04:50:34,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:34,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:50:34,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,557 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 04:50:34,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:34,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:50:34,563 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,684 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-06-05 04:50:34,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:34,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:50:34,690 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,816 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-05 04:50:34,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:34,821 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 04:50:34,822 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:34,946 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 04:50:34,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:34,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:34,956 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 04:50:34,960 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:35,072 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-05 04:50:35,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:35,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:35,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 04:50:35,092 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:35,200 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 04:50:35,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:35,210 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 04:50:35,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 04:50:35,211 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:35,317 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 04:50:35,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:35,322 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 04:50:35,322 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 19 variables, input treesize:331, output treesize:157 [2021-06-05 04:50:35,517 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 04:50:35,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20431306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:35,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:35,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:50:35,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800401283] [2021-06-05 04:50:35,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:50:35,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:35,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:50:35,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:50:35,518 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 04:50:36,035 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 04:50:36,231 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 04:50:36,430 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 100 [2021-06-05 04:50:36,627 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-06-05 04:50:36,864 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2021-06-05 04:50:37,098 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 108 [2021-06-05 04:50:37,432 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 108 [2021-06-05 04:50:37,736 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-06-05 04:50:38,058 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-06-05 04:50:38,292 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 108 [2021-06-05 04:50:38,703 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2021-06-05 04:50:38,929 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 107 [2021-06-05 04:50:39,159 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 104 [2021-06-05 04:50:39,495 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 99 [2021-06-05 04:50:39,690 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 103 [2021-06-05 04:50:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:39,877 INFO L93 Difference]: Finished difference Result 1681 states and 5049 transitions. [2021-06-05 04:50:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:50:39,878 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 04:50:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:39,880 INFO L225 Difference]: With dead ends: 1681 [2021-06-05 04:50:39,880 INFO L226 Difference]: Without dead ends: 1572 [2021-06-05 04:50:39,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 4351.7ms TimeCoverageRelationStatistics Valid=361, Invalid=1279, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:50:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-06-05 04:50:39,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 835. [2021-06-05 04:50:39,891 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 04:50:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2757 transitions. [2021-06-05 04:50:39,892 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2757 transitions. Word has length 22 [2021-06-05 04:50:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:39,892 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2757 transitions. [2021-06-05 04:50:39,892 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 04:50:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2757 transitions. [2021-06-05 04:50:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:39,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:39,893 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 04:50:40,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9022 [2021-06-05 04:50:40,093 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:40,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1080546592, now seen corresponding path program 700 times [2021-06-05 04:50:40,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:40,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539074695] [2021-06-05 04:50:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:40,228 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 04:50:40,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:40,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539074695] [2021-06-05 04:50:40,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539074695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:40,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527797638] [2021-06-05 04:50:40,228 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 04:50:40,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:40,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:40,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:40,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:40,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:40,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:50:40,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:40,773 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 04:50:40,773 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:50:40,774 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 04:50:40,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:50:40,857 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 04:50:40,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527797638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:40,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:40,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:40,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370025725] [2021-06-05 04:50:40,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:40,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:40,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:40,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:40,858 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 04:50:41,266 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-06-05 04:50:41,470 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 93 [2021-06-05 04:50:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:41,790 INFO L93 Difference]: Finished difference Result 1278 states and 4004 transitions. [2021-06-05 04:50:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:41,790 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 04:50:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:41,791 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 04:50:41,791 INFO L226 Difference]: Without dead ends: 1278 [2021-06-05 04:50:41,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1031.6ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:41,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-06-05 04:50:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 833. [2021-06-05 04:50:41,801 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 04:50:41,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2752 transitions. [2021-06-05 04:50:41,802 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2752 transitions. Word has length 22 [2021-06-05 04:50:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:41,802 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2752 transitions. [2021-06-05 04:50:41,803 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 04:50:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2752 transitions. [2021-06-05 04:50:41,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:41,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:41,803 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 04:50:42,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9043,725 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:42,004 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:42,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:42,004 INFO L82 PathProgramCache]: Analyzing trace with hash 977112902, now seen corresponding path program 701 times [2021-06-05 04:50:42,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:42,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820869434] [2021-06-05 04:50:42,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:42,169 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 04:50:42,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:42,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820869434] [2021-06-05 04:50:42,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820869434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:42,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952063240] [2021-06-05 04:50:42,169 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 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 04:50:42,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:42,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:42,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:50:42,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:42,843 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 04:50:42,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952063240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:42,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:42,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:50:42,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964910537] [2021-06-05 04:50:42,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:50:42,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:42,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:50:42,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:50:42,844 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 04:50:43,264 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-05 04:50:43,485 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 96 [2021-06-05 04:50:43,678 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 59 [2021-06-05 04:50:44,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:44,019 INFO L93 Difference]: Finished difference Result 1233 states and 3881 transitions. [2021-06-05 04:50:44,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:50:44,019 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 04:50:44,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:44,021 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 04:50:44,021 INFO L226 Difference]: Without dead ends: 1200 [2021-06-05 04:50:44,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1405.9ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:50:44,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-05 04:50:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 835. [2021-06-05 04:50:44,030 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 04:50:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2757 transitions. [2021-06-05 04:50:44,031 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2757 transitions. Word has length 22 [2021-06-05 04:50:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:44,031 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2757 transitions. [2021-06-05 04:50:44,031 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 04:50:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2757 transitions. [2021-06-05 04:50:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:44,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:44,032 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 04:50:44,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9060,726 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:44,233 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:44,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:44,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1728513340, now seen corresponding path program 702 times [2021-06-05 04:50:44,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:44,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138142697] [2021-06-05 04:50:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:44,403 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 04:50:44,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:44,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138142697] [2021-06-05 04:50:44,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138142697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:44,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422815421] [2021-06-05 04:50:44,404 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 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 04:50:44,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:50:44,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:44,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:44,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:45,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:45,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:50:45,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:45,027 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 04:50:45,027 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:50:45,028 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 04:50:45,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 04:50:45,073 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 04:50:45,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422815421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:45,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:45,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:45,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585109966] [2021-06-05 04:50:45,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:45,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:45,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:45,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:45,074 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 04:50:45,503 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 83 [2021-06-05 04:50:45,705 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-06-05 04:50:45,971 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 70 [2021-06-05 04:50:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:46,194 INFO L93 Difference]: Finished difference Result 1214 states and 3839 transitions. [2021-06-05 04:50:46,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:50:46,194 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 04:50:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:46,196 INFO L225 Difference]: With dead ends: 1214 [2021-06-05 04:50:46,196 INFO L226 Difference]: Without dead ends: 1208 [2021-06-05 04:50:46,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1270.7ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:50:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-06-05 04:50:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 833. [2021-06-05 04:50:46,205 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 04:50:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2752 transitions. [2021-06-05 04:50:46,207 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2752 transitions. Word has length 22 [2021-06-05 04:50:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:46,207 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2752 transitions. [2021-06-05 04:50:46,207 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 04:50:46,207 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2752 transitions. [2021-06-05 04:50:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:46,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:46,208 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 04:50:46,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9075,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:46,408 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:46,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:46,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1477931050, now seen corresponding path program 703 times [2021-06-05 04:50:46,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:46,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088567614] [2021-06-05 04:50:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:46,547 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 04:50:46,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:46,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088567614] [2021-06-05 04:50:46,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088567614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:46,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877265088] [2021-06-05 04:50:46,547 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 04:50:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:46,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:46,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:47,122 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 04:50:47,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877265088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:47,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:47,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:47,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750603590] [2021-06-05 04:50:47,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:47,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:47,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:47,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:47,123 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 04:50:47,587 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 100 [2021-06-05 04:50:47,851 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2021-06-05 04:50:48,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:48,181 INFO L93 Difference]: Finished difference Result 1201 states and 3804 transitions. [2021-06-05 04:50:48,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:48,181 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 04:50:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:48,183 INFO L225 Difference]: With dead ends: 1201 [2021-06-05 04:50:48,183 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 04:50:48,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1159.0ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:48,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 04:50:48,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 833. [2021-06-05 04:50:48,192 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 04:50:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2750 transitions. [2021-06-05 04:50:48,193 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2750 transitions. Word has length 22 [2021-06-05 04:50:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:48,193 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2750 transitions. [2021-06-05 04:50:48,193 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 04:50:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2750 transitions. [2021-06-05 04:50:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:48,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:48,194 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 04:50:48,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 728 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9101 [2021-06-05 04:50:48,395 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:48,395 INFO L82 PathProgramCache]: Analyzing trace with hash 340646048, now seen corresponding path program 704 times [2021-06-05 04:50:48,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:48,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326474010] [2021-06-05 04:50:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:48,544 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 04:50:48,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:48,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326474010] [2021-06-05 04:50:48,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326474010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:48,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217441811] [2021-06-05 04:50:48,544 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 04:50:48,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:50:48,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:48,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:48,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:49,122 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 04:50:49,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217441811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:49,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:49,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:49,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122047665] [2021-06-05 04:50:49,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:49,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:49,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:49,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:49,123 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 04:50:49,625 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2021-06-05 04:50:49,835 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2021-06-05 04:50:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:50,151 INFO L93 Difference]: Finished difference Result 1195 states and 3789 transitions. [2021-06-05 04:50:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:50,151 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 04:50:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:50,153 INFO L225 Difference]: With dead ends: 1195 [2021-06-05 04:50:50,153 INFO L226 Difference]: Without dead ends: 1183 [2021-06-05 04:50:50,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1121.4ms TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-06-05 04:50:50,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 833. [2021-06-05 04:50:50,162 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 04:50:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2748 transitions. [2021-06-05 04:50:50,163 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2748 transitions. Word has length 22 [2021-06-05 04:50:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:50,163 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2748 transitions. [2021-06-05 04:50:50,163 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 04:50:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2748 transitions. [2021-06-05 04:50:50,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:50,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:50,164 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 04:50:50,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 729 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9114 [2021-06-05 04:50:50,364 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:50,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:50,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1092046486, now seen corresponding path program 705 times [2021-06-05 04:50:50,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:50,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044142128] [2021-06-05 04:50:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:50,497 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 04:50:50,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:50,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044142128] [2021-06-05 04:50:50,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044142128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:50,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40122273] [2021-06-05 04:50:50,498 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 04:50:50,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:50:50,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:50,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:50:50,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:51,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:50:51,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:51,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:51,118 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 04:50:51,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:51,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:51,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:51,204 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-06-05 04:50:51,205 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:51,208 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 12 treesize of output 8 [2021-06-05 04:50:51,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:51,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:51,288 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 04:50:51,288 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-06-05 04:50:51,290 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:51,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:50:51,294 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:51,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:50:51,361 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 04:50:51,362 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 7 variables, input treesize:207, output treesize:84 [2021-06-05 04:50:51,486 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 04:50:51,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40122273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:51,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:51,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:50:51,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553593784] [2021-06-05 04:50:51,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:50:51,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:51,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:50:51,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:50:51,486 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 04:50:51,996 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 04:50:52,204 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-06-05 04:50:52,628 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 04:50:52,902 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-05 04:50:53,040 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-05 04:50:53,241 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-06-05 04:50:53,393 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-06-05 04:50:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:53,420 INFO L93 Difference]: Finished difference Result 1371 states and 4260 transitions. [2021-06-05 04:50:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:50:53,420 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 04:50:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:53,422 INFO L225 Difference]: With dead ends: 1371 [2021-06-05 04:50:53,422 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 04:50:53,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2084.4ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:50:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 04:50:53,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 833. [2021-06-05 04:50:53,432 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 04:50:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2746 transitions. [2021-06-05 04:50:53,433 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2746 transitions. Word has length 22 [2021-06-05 04:50:53,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:53,433 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2746 transitions. [2021-06-05 04:50:53,433 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 04:50:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2746 transitions. [2021-06-05 04:50:53,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:53,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:53,434 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 04:50:53,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 730 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9128 [2021-06-05 04:50:53,635 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:53,635 INFO L82 PathProgramCache]: Analyzing trace with hash -823377440, now seen corresponding path program 706 times [2021-06-05 04:50:53,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:53,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709949532] [2021-06-05 04:50:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:53,774 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 04:50:53,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:53,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709949532] [2021-06-05 04:50:53,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709949532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:53,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397943866] [2021-06-05 04:50:53,774 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 04:50:53,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:50:53,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:53,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:53,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:54,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:50:54,320 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 04:50:54,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:50:54,335 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 04:50:54,335 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:50:54,335 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 04:50:54,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 04:50:54,380 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 04:50:54,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397943866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:54,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:54,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:54,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003776914] [2021-06-05 04:50:54,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:54,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:54,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:54,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:54,381 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 04:50:54,815 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-06-05 04:50:55,072 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-06-05 04:50:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:55,359 INFO L93 Difference]: Finished difference Result 1189 states and 3780 transitions. [2021-06-05 04:50:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:55,359 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 04:50:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:55,360 INFO L225 Difference]: With dead ends: 1189 [2021-06-05 04:50:55,360 INFO L226 Difference]: Without dead ends: 1189 [2021-06-05 04:50:55,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1097.9ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-06-05 04:50:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 829. [2021-06-05 04:50:55,369 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 04:50:55,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2736 transitions. [2021-06-05 04:50:55,371 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2736 transitions. Word has length 22 [2021-06-05 04:50:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:55,371 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2736 transitions. [2021-06-05 04:50:55,371 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 04:50:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2736 transitions. [2021-06-05 04:50:55,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:55,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:55,372 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 04:50:55,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9169 [2021-06-05 04:50:55,572 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:55,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:55,572 INFO L82 PathProgramCache]: Analyzing trace with hash -757398910, now seen corresponding path program 707 times [2021-06-05 04:50:55,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:55,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683167562] [2021-06-05 04:50:55,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:55,689 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 04:50:55,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:55,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683167562] [2021-06-05 04:50:55,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683167562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:55,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211717020] [2021-06-05 04:50:55,690 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 04:50:55,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:50:55,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:55,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:55,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:56,060 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-05 04:50:56,302 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 04:50:56,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211717020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:56,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:56,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:56,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272924134] [2021-06-05 04:50:56,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:56,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:56,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:56,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:56,303 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 04:50:56,613 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-06-05 04:50:56,794 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2021-06-05 04:50:56,971 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 84 [2021-06-05 04:50:57,142 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 86 [2021-06-05 04:50:57,300 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2021-06-05 04:50:57,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:57,473 INFO L93 Difference]: Finished difference Result 1414 states and 4401 transitions. [2021-06-05 04:50:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:57,474 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 04:50:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:57,476 INFO L225 Difference]: With dead ends: 1414 [2021-06-05 04:50:57,476 INFO L226 Difference]: Without dead ends: 1414 [2021-06-05 04:50:57,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1279.5ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-06-05 04:50:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 842. [2021-06-05 04:50:57,486 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 04:50:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2785 transitions. [2021-06-05 04:50:57,487 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2785 transitions. Word has length 22 [2021-06-05 04:50:57,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:57,488 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2785 transitions. [2021-06-05 04:50:57,488 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 04:50:57,488 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2785 transitions. [2021-06-05 04:50:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:57,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:57,489 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 04:50:57,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9194,732 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:50:57,689 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2043660664, now seen corresponding path program 708 times [2021-06-05 04:50:57,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:57,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922805874] [2021-06-05 04:50:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:57,804 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 04:50:57,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:57,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922805874] [2021-06-05 04:50:57,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922805874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:57,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419182222] [2021-06-05 04:50:57,804 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 04:50:57,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:50:57,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:50:57,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:50:57,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:50:58,370 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 04:50:58,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419182222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:58,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:50:58,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:50:58,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336748692] [2021-06-05 04:50:58,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:50:58,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:50:58,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:50:58,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:50:58,371 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 04:50:58,705 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2021-06-05 04:50:58,878 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2021-06-05 04:50:59,054 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2021-06-05 04:50:59,277 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78 [2021-06-05 04:50:59,440 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2021-06-05 04:50:59,608 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2021-06-05 04:50:59,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:50:59,641 INFO L93 Difference]: Finished difference Result 1420 states and 4408 transitions. [2021-06-05 04:50:59,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:50:59,641 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 04:50:59,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:50:59,643 INFO L225 Difference]: With dead ends: 1420 [2021-06-05 04:50:59,643 INFO L226 Difference]: Without dead ends: 1414 [2021-06-05 04:50:59,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1321.8ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:50:59,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-06-05 04:50:59,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 839. [2021-06-05 04:50:59,653 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 04:50:59,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2774 transitions. [2021-06-05 04:50:59,655 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2774 transitions. Word has length 22 [2021-06-05 04:50:59,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:50:59,655 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2774 transitions. [2021-06-05 04:50:59,655 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 04:50:59,655 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2774 transitions. [2021-06-05 04:50:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:50:59,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:50:59,656 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 04:50:59,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 733 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9210 [2021-06-05 04:50:59,856 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:50:59,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:50:59,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1713451054, now seen corresponding path program 709 times [2021-06-05 04:50:59,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:50:59,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104553765] [2021-06-05 04:50:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:50:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:50:59,980 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 04:50:59,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:50:59,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104553765] [2021-06-05 04:50:59,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104553765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:50:59,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272949750] [2021-06-05 04:50:59,980 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 04:51:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:00,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:00,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:00,573 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 04:51:00,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272949750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:00,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:00,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:00,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752753968] [2021-06-05 04:51:00,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:00,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:00,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:00,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:00,574 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 04:51:00,918 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-06-05 04:51:01,097 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2021-06-05 04:51:01,290 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 74 [2021-06-05 04:51:01,467 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 76 [2021-06-05 04:51:01,763 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 72 [2021-06-05 04:51:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:01,783 INFO L93 Difference]: Finished difference Result 1384 states and 4326 transitions. [2021-06-05 04:51:01,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:01,783 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 04:51:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:01,785 INFO L225 Difference]: With dead ends: 1384 [2021-06-05 04:51:01,785 INFO L226 Difference]: Without dead ends: 1372 [2021-06-05 04:51:01,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1299.2ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-05 04:51:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 836. [2021-06-05 04:51:01,795 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 04:51:01,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2763 transitions. [2021-06-05 04:51:01,796 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2763 transitions. Word has length 22 [2021-06-05 04:51:01,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:01,796 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2763 transitions. [2021-06-05 04:51:01,796 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 04:51:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2763 transitions. [2021-06-05 04:51:01,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:01,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:01,797 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 04:51:01,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9228,734 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:01,998 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:01,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:01,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2075169976, now seen corresponding path program 710 times [2021-06-05 04:51:01,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:01,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27701745] [2021-06-05 04:51:01,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:02,108 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 04:51:02,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:02,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27701745] [2021-06-05 04:51:02,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27701745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:02,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023912059] [2021-06-05 04:51:02,109 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 04:51:02,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:02,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:02,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:02,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:02,613 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 04:51:02,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023912059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:02,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:02,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:02,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391247462] [2021-06-05 04:51:02,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:02,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:02,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:02,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:02,614 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 04:51:02,913 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 04:51:03,083 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2021-06-05 04:51:03,262 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2021-06-05 04:51:03,442 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 49 [2021-06-05 04:51:03,575 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 50 [2021-06-05 04:51:03,730 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2021-06-05 04:51:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:03,751 INFO L93 Difference]: Finished difference Result 1381 states and 4315 transitions. [2021-06-05 04:51:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:03,751 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 04:51:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:03,753 INFO L225 Difference]: With dead ends: 1381 [2021-06-05 04:51:03,753 INFO L226 Difference]: Without dead ends: 1363 [2021-06-05 04:51:03,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1196.7ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1363 states. [2021-06-05 04:51:03,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1363 to 833. [2021-06-05 04:51:03,763 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 04:51:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2752 transitions. [2021-06-05 04:51:03,765 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2752 transitions. Word has length 22 [2021-06-05 04:51:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:03,765 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2752 transitions. [2021-06-05 04:51:03,765 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 04:51:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2752 transitions. [2021-06-05 04:51:03,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:03,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:03,766 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 04:51:03,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9240,735 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:03,982 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:03,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:03,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1179561522, now seen corresponding path program 711 times [2021-06-05 04:51:03,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:03,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208758815] [2021-06-05 04:51:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:04,157 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 04:51:04,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:04,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208758815] [2021-06-05 04:51:04,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208758815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:04,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378826527] [2021-06-05 04:51:04,157 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 04:51:04,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:51:04,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:04,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:04,659 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 04:51:04,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378826527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:04,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:04,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:04,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105326471] [2021-06-05 04:51:04,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:04,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:04,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:04,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:04,660 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 04:51:04,962 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 04:51:05,126 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-06-05 04:51:05,416 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 49 [2021-06-05 04:51:05,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:05,687 INFO L93 Difference]: Finished difference Result 1419 states and 4388 transitions. [2021-06-05 04:51:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:05,688 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 04:51:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:05,690 INFO L225 Difference]: With dead ends: 1419 [2021-06-05 04:51:05,690 INFO L226 Difference]: Without dead ends: 1395 [2021-06-05 04:51:05,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1126.6ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:05,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-06-05 04:51:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 830. [2021-06-05 04:51:05,700 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 04:51:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2741 transitions. [2021-06-05 04:51:05,701 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2741 transitions. Word has length 22 [2021-06-05 04:51:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:05,702 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2741 transitions. [2021-06-05 04:51:05,702 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 04:51:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2741 transitions. [2021-06-05 04:51:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:05,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:05,703 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 04:51:05,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 736 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9257 [2021-06-05 04:51:05,903 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:05,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:05,903 INFO L82 PathProgramCache]: Analyzing trace with hash 381531912, now seen corresponding path program 712 times [2021-06-05 04:51:05,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:05,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816648903] [2021-06-05 04:51:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:06,026 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 04:51:06,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:06,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816648903] [2021-06-05 04:51:06,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816648903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:06,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53643502] [2021-06-05 04:51:06,027 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 04:51:06,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:06,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:06,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:06,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:06,397 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 04:51:06,707 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 04:51:06,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53643502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:06,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:06,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:06,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90465103] [2021-06-05 04:51:06,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:06,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:06,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:06,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:06,708 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 04:51:07,031 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2021-06-05 04:51:07,233 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 04:51:07,419 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 67 [2021-06-05 04:51:07,606 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-06-05 04:51:07,767 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-06-05 04:51:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:07,932 INFO L93 Difference]: Finished difference Result 1341 states and 4208 transitions. [2021-06-05 04:51:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:07,933 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 04:51:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:07,934 INFO L225 Difference]: With dead ends: 1341 [2021-06-05 04:51:07,934 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 04:51:07,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1359.9ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 04:51:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 840. [2021-06-05 04:51:07,945 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 04:51:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2779 transitions. [2021-06-05 04:51:07,946 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2779 transitions. Word has length 22 [2021-06-05 04:51:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:07,946 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2779 transitions. [2021-06-05 04:51:07,946 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 04:51:07,946 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2779 transitions. [2021-06-05 04:51:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:07,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:07,947 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 04:51:08,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9278,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:08,148 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:08,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:08,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1112375810, now seen corresponding path program 713 times [2021-06-05 04:51:08,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:08,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178349499] [2021-06-05 04:51:08,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:08,268 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 04:51:08,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:08,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178349499] [2021-06-05 04:51:08,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178349499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:08,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961109864] [2021-06-05 04:51:08,268 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 04:51:08,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:51:08,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:08,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:08,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:08,644 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 04:51:08,940 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 04:51:08,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961109864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:08,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:08,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:08,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820636847] [2021-06-05 04:51:08,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:08,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:08,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:08,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:08,941 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 04:51:09,271 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 04:51:09,473 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-06-05 04:51:09,664 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2021-06-05 04:51:09,841 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-06-05 04:51:10,007 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-05 04:51:10,241 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-05 04:51:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:10,269 INFO L93 Difference]: Finished difference Result 1347 states and 4215 transitions. [2021-06-05 04:51:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:10,270 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 04:51:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:10,271 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 04:51:10,271 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 04:51:10,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1448.9ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 04:51:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 837. [2021-06-05 04:51:10,281 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 04:51:10,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2768 transitions. [2021-06-05 04:51:10,283 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2768 transitions. Word has length 22 [2021-06-05 04:51:10,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:10,283 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2768 transitions. [2021-06-05 04:51:10,283 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 04:51:10,283 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2768 transitions. [2021-06-05 04:51:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:10,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:10,284 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 04:51:10,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9298 [2021-06-05 04:51:10,484 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:10,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:10,484 INFO L82 PathProgramCache]: Analyzing trace with hash -574520232, now seen corresponding path program 714 times [2021-06-05 04:51:10,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:10,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378407352] [2021-06-05 04:51:10,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:10,627 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 04:51:10,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:10,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378407352] [2021-06-05 04:51:10,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378407352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:10,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547182026] [2021-06-05 04:51:10,628 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 04:51:10,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:51:10,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:10,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:10,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:11,264 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 04:51:11,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547182026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:11,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:11,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:11,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779905142] [2021-06-05 04:51:11,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:11,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:11,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:11,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:11,265 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 04:51:11,593 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 04:51:11,800 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2021-06-05 04:51:12,039 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2021-06-05 04:51:12,221 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2021-06-05 04:51:12,538 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 04:51:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:12,558 INFO L93 Difference]: Finished difference Result 1311 states and 4133 transitions. [2021-06-05 04:51:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:12,559 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 04:51:12,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:12,560 INFO L225 Difference]: With dead ends: 1311 [2021-06-05 04:51:12,560 INFO L226 Difference]: Without dead ends: 1299 [2021-06-05 04:51:12,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1404.1ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-06-05 04:51:12,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 834. [2021-06-05 04:51:12,570 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 04:51:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2757 transitions. [2021-06-05 04:51:12,571 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2757 transitions. Word has length 22 [2021-06-05 04:51:12,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:12,571 INFO L482 AbstractCegarLoop]: Abstraction has 834 states and 2757 transitions. [2021-06-05 04:51:12,571 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 04:51:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2757 transitions. [2021-06-05 04:51:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:12,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:12,572 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 04:51:12,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9319,739 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:12,773 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:12,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1080866498, now seen corresponding path program 715 times [2021-06-05 04:51:12,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:12,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765362223] [2021-06-05 04:51:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:12,889 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 04:51:12,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:12,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765362223] [2021-06-05 04:51:12,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765362223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:12,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340417450] [2021-06-05 04:51:12,889 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 04:51:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:13,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:13,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:13,489 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 04:51:13,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340417450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:13,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:13,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:13,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537390200] [2021-06-05 04:51:13,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:13,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:13,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:13,489 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 04:51:13,808 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-05 04:51:14,015 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-06-05 04:51:14,204 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 80 [2021-06-05 04:51:14,507 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-06-05 04:51:14,661 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-06-05 04:51:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:14,674 INFO L93 Difference]: Finished difference Result 1308 states and 4122 transitions. [2021-06-05 04:51:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:14,674 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 04:51:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:14,676 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 04:51:14,676 INFO L226 Difference]: Without dead ends: 1290 [2021-06-05 04:51:14,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1277.5ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-06-05 04:51:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 831. [2021-06-05 04:51:14,686 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 04:51:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2746 transitions. [2021-06-05 04:51:14,688 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2746 transitions. Word has length 22 [2021-06-05 04:51:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:14,688 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2746 transitions. [2021-06-05 04:51:14,688 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 04:51:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2746 transitions. [2021-06-05 04:51:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:14,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:14,689 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 04:51:14,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9344 [2021-06-05 04:51:14,889 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:14,889 INFO L82 PathProgramCache]: Analyzing trace with hash 922847102, now seen corresponding path program 716 times [2021-06-05 04:51:14,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:14,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558446892] [2021-06-05 04:51:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:15,039 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 04:51:15,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:15,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558446892] [2021-06-05 04:51:15,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558446892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:15,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95452339] [2021-06-05 04:51:15,039 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 04:51:15,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:15,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:15,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:15,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:15,676 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 04:51:15,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95452339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:15,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:15,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:15,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696355106] [2021-06-05 04:51:15,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:15,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:15,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:15,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:15,677 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 04:51:15,996 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 04:51:16,203 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-06-05 04:51:16,413 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2021-06-05 04:51:16,594 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2021-06-05 04:51:16,769 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 04:51:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:16,935 INFO L93 Difference]: Finished difference Result 1341 states and 4205 transitions. [2021-06-05 04:51:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:16,935 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 04:51:16,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:16,937 INFO L225 Difference]: With dead ends: 1341 [2021-06-05 04:51:16,937 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 04:51:16,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1373.6ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:16,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 04:51:16,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 838. [2021-06-05 04:51:16,947 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 04:51:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2773 transitions. [2021-06-05 04:51:16,948 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2773 transitions. Word has length 22 [2021-06-05 04:51:16,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:16,949 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2773 transitions. [2021-06-05 04:51:16,949 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 04:51:16,949 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2773 transitions. [2021-06-05 04:51:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:16,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:16,950 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 04:51:17,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9364,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:17,150 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:17,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:17,150 INFO L82 PathProgramCache]: Analyzing trace with hash -571060620, now seen corresponding path program 717 times [2021-06-05 04:51:17,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:17,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803341584] [2021-06-05 04:51:17,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:17,293 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 04:51:17,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:17,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803341584] [2021-06-05 04:51:17,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803341584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:17,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751801350] [2021-06-05 04:51:17,293 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 04:51:17,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:51:17,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:17,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:17,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:17,920 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 04:51:17,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751801350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:17,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:17,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:17,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125548953] [2021-06-05 04:51:17,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:17,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:17,920 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 04:51:18,232 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 79 [2021-06-05 04:51:18,444 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2021-06-05 04:51:18,660 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-06-05 04:51:18,839 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 79 [2021-06-05 04:51:19,013 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-06-05 04:51:19,194 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-06-05 04:51:19,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:19,224 INFO L93 Difference]: Finished difference Result 1347 states and 4212 transitions. [2021-06-05 04:51:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:19,224 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 04:51:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:19,226 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 04:51:19,226 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 04:51:19,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1403.1ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:19,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 04:51:19,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 835. [2021-06-05 04:51:19,236 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 04:51:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2762 transitions. [2021-06-05 04:51:19,237 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2762 transitions. Word has length 22 [2021-06-05 04:51:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:19,237 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2762 transitions. [2021-06-05 04:51:19,237 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 04:51:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2762 transitions. [2021-06-05 04:51:19,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:19,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:19,238 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 04:51:19,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 742 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9377 [2021-06-05 04:51:19,439 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:19,439 INFO L82 PathProgramCache]: Analyzing trace with hash -33205042, now seen corresponding path program 718 times [2021-06-05 04:51:19,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:19,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189821763] [2021-06-05 04:51:19,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:19,591 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 04:51:19,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:19,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189821763] [2021-06-05 04:51:19,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189821763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:19,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276746274] [2021-06-05 04:51:19,592 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 04:51:19,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:19,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:19,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:19,949 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-05 04:51:20,270 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 04:51:20,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276746274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:20,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:20,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:20,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374662588] [2021-06-05 04:51:20,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:20,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:20,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:20,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:20,271 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 04:51:20,703 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 04:51:20,907 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-06-05 04:51:21,126 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 95 [2021-06-05 04:51:21,313 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 80 [2021-06-05 04:51:21,633 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-06-05 04:51:21,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:21,646 INFO L93 Difference]: Finished difference Result 1311 states and 4130 transitions. [2021-06-05 04:51:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:21,647 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 04:51:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:21,648 INFO L225 Difference]: With dead ends: 1311 [2021-06-05 04:51:21,648 INFO L226 Difference]: Without dead ends: 1299 [2021-06-05 04:51:21,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1511.8ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:21,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-06-05 04:51:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 832. [2021-06-05 04:51:21,658 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 04:51:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2751 transitions. [2021-06-05 04:51:21,659 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2751 transitions. Word has length 22 [2021-06-05 04:51:21,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:21,659 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2751 transitions. [2021-06-05 04:51:21,659 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 04:51:21,659 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2751 transitions. [2021-06-05 04:51:21,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:21,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:21,660 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 04:51:21,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9394,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:21,861 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:21,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:21,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1553543096, now seen corresponding path program 719 times [2021-06-05 04:51:21,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:21,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418799172] [2021-06-05 04:51:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:21,992 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 04:51:21,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:21,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418799172] [2021-06-05 04:51:21,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418799172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:21,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126103341] [2021-06-05 04:51:21,992 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 04:51:22,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:51:22,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:22,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:22,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:22,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:22,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:51:22,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:22,557 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 04:51:22,557 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:51:22,558 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 04:51:22,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:51:22,630 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 04:51:22,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126103341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:22,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:22,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:22,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068769347] [2021-06-05 04:51:22,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:22,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:22,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:22,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:22,630 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 04:51:22,951 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-06-05 04:51:23,153 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2021-06-05 04:51:23,363 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 101 [2021-06-05 04:51:23,556 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 90 [2021-06-05 04:51:23,728 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2021-06-05 04:51:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:23,914 INFO L93 Difference]: Finished difference Result 1416 states and 4390 transitions. [2021-06-05 04:51:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:23,914 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 04:51:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:23,916 INFO L225 Difference]: With dead ends: 1416 [2021-06-05 04:51:23,916 INFO L226 Difference]: Without dead ends: 1416 [2021-06-05 04:51:23,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1331.9ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:23,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-06-05 04:51:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 840. [2021-06-05 04:51:23,927 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 04:51:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2787 transitions. [2021-06-05 04:51:23,928 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2787 transitions. Word has length 22 [2021-06-05 04:51:23,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:23,928 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2787 transitions. [2021-06-05 04:51:23,928 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 04:51:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2787 transitions. [2021-06-05 04:51:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:23,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:23,929 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 04:51:24,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 744 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9412 [2021-06-05 04:51:24,130 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:24,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:24,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1247516478, now seen corresponding path program 720 times [2021-06-05 04:51:24,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:24,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575710593] [2021-06-05 04:51:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:24,279 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 04:51:24,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:24,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575710593] [2021-06-05 04:51:24,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575710593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:24,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273566119] [2021-06-05 04:51:24,279 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 04:51:24,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:51:24,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:24,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:24,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:24,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:24,801 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 8 treesize of output 1 [2021-06-05 04:51:24,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:24,830 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:51:24,831 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:51:24,831 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 04:51:24,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:51:24,901 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 04:51:24,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273566119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:24,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:24,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:24,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268611482] [2021-06-05 04:51:24,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:24,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:24,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:24,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:24,902 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 04:51:25,208 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-06-05 04:51:25,408 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2021-06-05 04:51:25,615 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 84 [2021-06-05 04:51:25,804 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-06-05 04:51:25,979 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2021-06-05 04:51:26,169 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-06-05 04:51:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:26,211 INFO L93 Difference]: Finished difference Result 1422 states and 4391 transitions. [2021-06-05 04:51:26,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:26,211 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 04:51:26,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:26,213 INFO L225 Difference]: With dead ends: 1422 [2021-06-05 04:51:26,213 INFO L226 Difference]: Without dead ends: 1416 [2021-06-05 04:51:26,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1361.1ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-06-05 04:51:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 837. [2021-06-05 04:51:26,223 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 04:51:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2776 transitions. [2021-06-05 04:51:26,225 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2776 transitions. Word has length 22 [2021-06-05 04:51:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:26,225 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2776 transitions. [2021-06-05 04:51:26,225 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 04:51:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2776 transitions. [2021-06-05 04:51:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:26,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:26,226 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 04:51:26,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9429,745 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:26,426 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:26,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:26,427 INFO L82 PathProgramCache]: Analyzing trace with hash -802142658, now seen corresponding path program 721 times [2021-06-05 04:51:26,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:26,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505915003] [2021-06-05 04:51:26,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:26,566 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 04:51:26,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:26,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505915003] [2021-06-05 04:51:26,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505915003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:26,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179699355] [2021-06-05 04:51:26,567 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 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 04:51:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:26,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:26,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:27,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:27,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:51:27,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:27,146 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 04:51:27,146 INFO L518 ElimStorePlain]: Eliminatee v_prenex_764 vanished before elimination [2021-06-05 04:51:27,147 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 04:51:27,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:51:27,223 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 04:51:27,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179699355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:27,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:27,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:27,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232560144] [2021-06-05 04:51:27,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:27,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:27,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:27,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:27,224 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 04:51:27,514 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-06-05 04:51:27,707 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 04:51:27,905 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-06-05 04:51:28,093 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2021-06-05 04:51:28,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:28,666 INFO L93 Difference]: Finished difference Result 1411 states and 4375 transitions. [2021-06-05 04:51:28,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:51:28,667 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 04:51:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:28,669 INFO L225 Difference]: With dead ends: 1411 [2021-06-05 04:51:28,669 INFO L226 Difference]: Without dead ends: 1390 [2021-06-05 04:51:28,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1532.1ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:51:28,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-05 04:51:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 833. [2021-06-05 04:51:28,679 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 04:51:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-06-05 04:51:28,681 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-06-05 04:51:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:28,681 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-06-05 04:51:28,681 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 04:51:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-06-05 04:51:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:28,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:28,682 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 04:51:28,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 746 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9447 [2021-06-05 04:51:28,882 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:28,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:28,882 INFO L82 PathProgramCache]: Analyzing trace with hash -781406130, now seen corresponding path program 722 times [2021-06-05 04:51:28,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:28,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942557180] [2021-06-05 04:51:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:29,015 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 04:51:29,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:29,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942557180] [2021-06-05 04:51:29,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942557180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:29,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323110574] [2021-06-05 04:51:29,015 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 04:51:29,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:29,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:29,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:29,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:29,529 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 8 treesize of output 1 [2021-06-05 04:51:29,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:29,569 INFO L628 ElimStorePlain]: treesize reduction 166, result has 14.0 percent of original size [2021-06-05 04:51:29,569 INFO L518 ElimStorePlain]: Eliminatee v_prenex_772 vanished before elimination [2021-06-05 04:51:29,569 INFO L518 ElimStorePlain]: Eliminatee v_prenex_773 vanished before elimination [2021-06-05 04:51:29,569 INFO L518 ElimStorePlain]: Eliminatee v_prenex_774 vanished before elimination [2021-06-05 04:51:29,569 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:51:29,570 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 04:51:29,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:220, output treesize:27 [2021-06-05 04:51:29,640 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 04:51:29,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323110574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:29,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:29,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:29,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693504076] [2021-06-05 04:51:29,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:29,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:29,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:29,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:29,641 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 04:51:29,948 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 04:51:30,148 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-06-05 04:51:30,358 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 95 [2021-06-05 04:51:30,553 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-06-05 04:51:30,747 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2021-06-05 04:51:30,934 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-06-05 04:51:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:31,043 INFO L93 Difference]: Finished difference Result 1367 states and 4273 transitions. [2021-06-05 04:51:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:51:31,044 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 04:51:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:31,045 INFO L225 Difference]: With dead ends: 1367 [2021-06-05 04:51:31,045 INFO L226 Difference]: Without dead ends: 1361 [2021-06-05 04:51:31,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1441.9ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:51:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-06-05 04:51:31,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 833. [2021-06-05 04:51:31,055 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 04:51:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-06-05 04:51:31,057 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-06-05 04:51:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:31,057 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-06-05 04:51:31,057 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 04:51:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-06-05 04:51:31,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:31,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:31,058 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 04:51:31,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9463,747 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:31,258 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:31,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1494703550, now seen corresponding path program 723 times [2021-06-05 04:51:31,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:31,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578223290] [2021-06-05 04:51:31,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:31,422 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 04:51:31,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:31,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578223290] [2021-06-05 04:51:31,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578223290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:31,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689999109] [2021-06-05 04:51:31,423 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 04:51:31,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:51:31,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:31,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:31,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:32,052 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 04:51:32,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689999109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:32,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:32,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:32,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396502443] [2021-06-05 04:51:32,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:32,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:32,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:32,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:32,053 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 04:51:32,364 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2021-06-05 04:51:32,570 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 04:51:32,789 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2021-06-05 04:51:33,055 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 71 [2021-06-05 04:51:33,369 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 91 [2021-06-05 04:51:33,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:33,384 INFO L93 Difference]: Finished difference Result 1305 states and 4119 transitions. [2021-06-05 04:51:33,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:33,384 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 04:51:33,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:33,386 INFO L225 Difference]: With dead ends: 1305 [2021-06-05 04:51:33,386 INFO L226 Difference]: Without dead ends: 1293 [2021-06-05 04:51:33,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1455.9ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:33,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-06-05 04:51:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 835. [2021-06-05 04:51:33,396 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 04:51:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-06-05 04:51:33,397 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-06-05 04:51:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:33,397 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-06-05 04:51:33,397 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 04:51:33,397 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-06-05 04:51:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:33,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:33,398 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 04:51:33,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 748 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9482 [2021-06-05 04:51:33,599 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:33,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:33,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2048863308, now seen corresponding path program 724 times [2021-06-05 04:51:33,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:33,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962832916] [2021-06-05 04:51:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:33,747 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 04:51:33,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:33,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962832916] [2021-06-05 04:51:33,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962832916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:33,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954835342] [2021-06-05 04:51:33,748 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 04:51:33,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:33,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:33,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:33,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:34,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:34,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:51:34,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:34,362 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 04:51:34,362 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:51:34,363 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 04:51:34,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 04:51:34,406 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 04:51:34,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954835342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:34,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:34,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:34,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969829053] [2021-06-05 04:51:34,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:34,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:34,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:34,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:34,407 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 04:51:34,706 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 04:51:34,907 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 93 [2021-06-05 04:51:35,125 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 97 [2021-06-05 04:51:35,334 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2021-06-05 04:51:35,510 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 04:51:35,690 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-05 04:51:35,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:35,795 INFO L93 Difference]: Finished difference Result 1307 states and 4126 transitions. [2021-06-05 04:51:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:51:35,795 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 04:51:35,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:35,797 INFO L225 Difference]: With dead ends: 1307 [2021-06-05 04:51:35,797 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 04:51:35,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1489.1ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:51:35,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 04:51:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 833. [2021-06-05 04:51:35,807 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 04:51:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-06-05 04:51:35,808 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-06-05 04:51:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:35,808 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-06-05 04:51:35,809 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 04:51:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-06-05 04:51:35,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:35,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:35,809 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 04:51:36,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 749 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9499 [2021-06-05 04:51:36,010 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:36,010 INFO L82 PathProgramCache]: Analyzing trace with hash -960340402, now seen corresponding path program 725 times [2021-06-05 04:51:36,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:36,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082730443] [2021-06-05 04:51:36,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:36,122 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 04:51:36,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:36,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082730443] [2021-06-05 04:51:36,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082730443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:36,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448317368] [2021-06-05 04:51:36,123 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 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 04:51:36,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:51:36,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:36,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:36,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:36,677 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 04:51:36,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448317368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:36,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:36,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:36,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416186347] [2021-06-05 04:51:36,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:36,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:36,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:36,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:36,677 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 04:51:37,017 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 04:51:37,232 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-05 04:51:37,534 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2021-06-05 04:51:37,692 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 57 [2021-06-05 04:51:37,861 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2021-06-05 04:51:38,031 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 04:51:38,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:38,046 INFO L93 Difference]: Finished difference Result 1302 states and 4111 transitions. [2021-06-05 04:51:38,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:38,047 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 04:51:38,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:38,049 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 04:51:38,049 INFO L226 Difference]: Without dead ends: 1284 [2021-06-05 04:51:38,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1380.4ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:38,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-05 04:51:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 835. [2021-06-05 04:51:38,058 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 04:51:38,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-06-05 04:51:38,060 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-06-05 04:51:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:38,060 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-06-05 04:51:38,060 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 04:51:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-06-05 04:51:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:38,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:38,061 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 04:51:38,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 750 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9531 [2021-06-05 04:51:38,277 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:38,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:38,278 INFO L82 PathProgramCache]: Analyzing trace with hash 858236696, now seen corresponding path program 726 times [2021-06-05 04:51:38,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:38,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885549625] [2021-06-05 04:51:38,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:38,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:38,428 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 04:51:38,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:38,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885549625] [2021-06-05 04:51:38,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885549625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:38,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140686833] [2021-06-05 04:51:38,428 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 04:51:38,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:51:38,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:38,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:38,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:39,043 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 04:51:39,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140686833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:39,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:39,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:39,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178073045] [2021-06-05 04:51:39,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:39,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:39,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:39,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:39,043 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 04:51:39,370 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 04:51:39,581 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-06-05 04:51:39,803 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-06-05 04:51:39,983 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2021-06-05 04:51:40,297 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-06-05 04:51:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:40,312 INFO L93 Difference]: Finished difference Result 1298 states and 4103 transitions. [2021-06-05 04:51:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:40,312 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 04:51:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:40,314 INFO L225 Difference]: With dead ends: 1298 [2021-06-05 04:51:40,314 INFO L226 Difference]: Without dead ends: 1286 [2021-06-05 04:51:40,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1368.9ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:40,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-06-05 04:51:40,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 837. [2021-06-05 04:51:40,323 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 04:51:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2766 transitions. [2021-06-05 04:51:40,325 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2766 transitions. Word has length 22 [2021-06-05 04:51:40,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:40,325 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2766 transitions. [2021-06-05 04:51:40,325 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 04:51:40,325 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2766 transitions. [2021-06-05 04:51:40,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:40,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:40,326 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 04:51:40,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9549,751 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:40,526 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:40,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:40,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1609637134, now seen corresponding path program 727 times [2021-06-05 04:51:40,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:40,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891074763] [2021-06-05 04:51:40,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:40,656 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 04:51:40,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:40,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891074763] [2021-06-05 04:51:40,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891074763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:40,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436027044] [2021-06-05 04:51:40,657 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 04:51:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:40,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:40,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:41,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:41,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:41,240 INFO L628 ElimStorePlain]: treesize reduction 79, result has 13.2 percent of original size [2021-06-05 04:51:41,240 INFO L518 ElimStorePlain]: Eliminatee v_prenex_808 vanished before elimination [2021-06-05 04:51:41,240 INFO L518 ElimStorePlain]: Eliminatee v_prenex_809 vanished before elimination [2021-06-05 04:51:41,240 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:51:41,241 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 04:51:41,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:112, output treesize:12 [2021-06-05 04:51:41,285 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 04:51:41,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436027044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:41,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:41,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:41,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631568051] [2021-06-05 04:51:41,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:41,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:41,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:41,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:41,286 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 04:51:41,604 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 04:51:41,806 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-05 04:51:42,072 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2021-06-05 04:51:42,321 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2021-06-05 04:51:42,492 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-05 04:51:42,669 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-06-05 04:51:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:42,773 INFO L93 Difference]: Finished difference Result 1300 states and 4110 transitions. [2021-06-05 04:51:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:51:42,773 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 04:51:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:42,775 INFO L225 Difference]: With dead ends: 1300 [2021-06-05 04:51:42,775 INFO L226 Difference]: Without dead ends: 1294 [2021-06-05 04:51:42,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1559.5ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:51:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-06-05 04:51:42,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 833. [2021-06-05 04:51:42,790 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 04:51:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2756 transitions. [2021-06-05 04:51:42,791 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2756 transitions. Word has length 22 [2021-06-05 04:51:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:42,791 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2756 transitions. [2021-06-05 04:51:42,791 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 04:51:42,791 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2756 transitions. [2021-06-05 04:51:42,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:42,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:42,792 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 04:51:42,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 752 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9567 [2021-06-05 04:51:42,993 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1738219842, now seen corresponding path program 728 times [2021-06-05 04:51:42,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:42,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645000269] [2021-06-05 04:51:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:43,097 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 04:51:43,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:43,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645000269] [2021-06-05 04:51:43,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645000269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:43,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518113023] [2021-06-05 04:51:43,097 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 04:51:43,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:43,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:43,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:43,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:43,472 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-05 04:51:43,674 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 04:51:43,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518113023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:43,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:43,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:43,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341513717] [2021-06-05 04:51:43,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:43,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:43,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:43,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:43,675 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 04:51:43,998 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-05 04:51:44,248 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-05 04:51:44,535 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 53 [2021-06-05 04:51:44,661 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2021-06-05 04:51:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:44,811 INFO L93 Difference]: Finished difference Result 1332 states and 4167 transitions. [2021-06-05 04:51:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:44,811 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 04:51:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:44,813 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 04:51:44,813 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 04:51:44,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1239.7ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 04:51:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 835. [2021-06-05 04:51:44,823 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 04:51:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-06-05 04:51:44,825 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-06-05 04:51:44,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:44,825 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-06-05 04:51:44,825 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 04:51:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-06-05 04:51:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:44,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:44,826 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 04:51:45,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 753 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9588 [2021-06-05 04:51:45,026 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:45,026 INFO L82 PathProgramCache]: Analyzing trace with hash 515277176, now seen corresponding path program 729 times [2021-06-05 04:51:45,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:45,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047476001] [2021-06-05 04:51:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:45,136 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 04:51:45,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:45,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047476001] [2021-06-05 04:51:45,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047476001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:45,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782115190] [2021-06-05 04:51:45,136 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 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 04:51:45,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:51:45,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:45,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:45,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:45,504 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-05 04:51:45,749 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 04:51:45,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782115190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:45,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:45,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:45,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235259667] [2021-06-05 04:51:45,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:45,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:45,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:45,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:45,750 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 04:51:46,087 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 04:51:46,284 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2021-06-05 04:51:46,475 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 75 [2021-06-05 04:51:46,652 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 55 [2021-06-05 04:51:46,792 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 56 [2021-06-05 04:51:46,953 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2021-06-05 04:51:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:46,974 INFO L93 Difference]: Finished difference Result 1285 states and 4068 transitions. [2021-06-05 04:51:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:46,974 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 04:51:46,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:46,976 INFO L225 Difference]: With dead ends: 1285 [2021-06-05 04:51:46,976 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 04:51:46,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1332.3ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:46,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 04:51:46,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 837. [2021-06-05 04:51:46,986 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 04:51:46,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2766 transitions. [2021-06-05 04:51:46,988 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2766 transitions. Word has length 22 [2021-06-05 04:51:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:46,988 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 2766 transitions. [2021-06-05 04:51:46,988 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 04:51:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2766 transitions. [2021-06-05 04:51:46,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:46,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:46,989 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 04:51:47,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 754 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9608 [2021-06-05 04:51:47,189 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:47,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1961113022, now seen corresponding path program 730 times [2021-06-05 04:51:47,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:47,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64641772] [2021-06-05 04:51:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:47,328 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 04:51:47,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:47,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64641772] [2021-06-05 04:51:47,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64641772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:47,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095355029] [2021-06-05 04:51:47,329 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 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 04:51:47,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:47,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:47,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:47,865 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 04:51:47,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095355029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:47,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:47,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:47,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592790199] [2021-06-05 04:51:47,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:47,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:47,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:47,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:47,866 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 04:51:48,192 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2021-06-05 04:51:48,443 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-05 04:51:48,649 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-06-05 04:51:48,829 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-06-05 04:51:48,982 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2021-06-05 04:51:49,205 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-06-05 04:51:49,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:49,226 INFO L93 Difference]: Finished difference Result 1279 states and 4053 transitions. [2021-06-05 04:51:49,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:49,226 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 04:51:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:49,228 INFO L225 Difference]: With dead ends: 1279 [2021-06-05 04:51:49,228 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 04:51:49,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1389.7ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:51:49,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 04:51:49,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 839. [2021-06-05 04:51:49,237 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 04:51:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2771 transitions. [2021-06-05 04:51:49,239 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2771 transitions. Word has length 22 [2021-06-05 04:51:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:49,239 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2771 transitions. [2021-06-05 04:51:49,239 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 04:51:49,239 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2771 transitions. [2021-06-05 04:51:49,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:49,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:49,240 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 04:51:49,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9626,755 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:49,440 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:49,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1209712584, now seen corresponding path program 731 times [2021-06-05 04:51:49,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:49,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580421996] [2021-06-05 04:51:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:49,568 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 04:51:49,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:49,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580421996] [2021-06-05 04:51:49,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580421996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:49,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407112021] [2021-06-05 04:51:49,568 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 04:51:49,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:51:49,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:49,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:49,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:50,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:50,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:51:50,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:50,105 INFO L628 ElimStorePlain]: treesize reduction 33, result has 26.7 percent of original size [2021-06-05 04:51:50,105 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:51:50,105 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 04:51:50,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:12 [2021-06-05 04:51:50,149 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 04:51:50,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407112021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:50,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:50,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:51:50,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974767510] [2021-06-05 04:51:50,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:51:50,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:50,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:51:50,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:51:50,150 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 04:51:50,454 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-06-05 04:51:50,636 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2021-06-05 04:51:50,816 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-06-05 04:51:50,994 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 83 [2021-06-05 04:51:51,167 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2021-06-05 04:51:51,338 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-06-05 04:51:51,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:51,444 INFO L93 Difference]: Finished difference Result 1279 states and 4053 transitions. [2021-06-05 04:51:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:51:51,444 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 04:51:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:51,446 INFO L225 Difference]: With dead ends: 1279 [2021-06-05 04:51:51,446 INFO L226 Difference]: Without dead ends: 1273 [2021-06-05 04:51:51,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1398.2ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:51:51,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-05 04:51:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 835. [2021-06-05 04:51:51,456 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 04:51:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2761 transitions. [2021-06-05 04:51:51,457 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2761 transitions. Word has length 22 [2021-06-05 04:51:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:51,457 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2761 transitions. [2021-06-05 04:51:51,457 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 04:51:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2761 transitions. [2021-06-05 04:51:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:51,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:51,458 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 04:51:51,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9649,756 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:51,659 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:51,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:51,659 INFO L82 PathProgramCache]: Analyzing trace with hash 873218397, now seen corresponding path program 23 times [2021-06-05 04:51:51,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:51,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259619572] [2021-06-05 04:51:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:51,711 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 04:51:51,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:51,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259619572] [2021-06-05 04:51:51,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259619572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:51,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376295586] [2021-06-05 04:51:51,711 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 04:51:51,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:51:51,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:51,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:51:51,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:51,947 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 04:51:51,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376295586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:51,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:51,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:51:51,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486573507] [2021-06-05 04:51:51,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:51:51,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:51,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:51:51,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:51:51,947 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 04:51:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:52,383 INFO L93 Difference]: Finished difference Result 1130 states and 3525 transitions. [2021-06-05 04:51:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:52,384 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 04:51:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:52,385 INFO L225 Difference]: With dead ends: 1130 [2021-06-05 04:51:52,385 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 04:51:52,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 393.8ms TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:51:52,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 04:51:52,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 863. [2021-06-05 04:51:52,394 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 04:51:52,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2841 transitions. [2021-06-05 04:51:52,396 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2841 transitions. Word has length 22 [2021-06-05 04:51:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:52,396 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2841 transitions. [2021-06-05 04:51:52,396 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 04:51:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2841 transitions. [2021-06-05 04:51:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:52,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:52,397 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 04:51:52,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 757 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9671 [2021-06-05 04:51:52,597 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:52,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:52,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1581576615, now seen corresponding path program 24 times [2021-06-05 04:51:52,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:52,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676190561] [2021-06-05 04:51:52,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:52,650 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 04:51:52,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:52,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676190561] [2021-06-05 04:51:52,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676190561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:52,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711205855] [2021-06-05 04:51:52,650 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 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 04:51:52,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:51:52,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:52,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:51:52,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:52,879 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 04:51:52,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711205855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:52,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:52,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:51:52,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298360964] [2021-06-05 04:51:52,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:51:52,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:52,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:51:52,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:51:52,880 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 04:51:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:53,366 INFO L93 Difference]: Finished difference Result 1129 states and 3521 transitions. [2021-06-05 04:51:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:51:53,367 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 04:51:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:53,368 INFO L225 Difference]: With dead ends: 1129 [2021-06-05 04:51:53,368 INFO L226 Difference]: Without dead ends: 1117 [2021-06-05 04:51:53,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 445.7ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:51:53,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-06-05 04:51:53,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 860. [2021-06-05 04:51:53,378 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 04:51:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2830 transitions. [2021-06-05 04:51:53,379 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2830 transitions. Word has length 22 [2021-06-05 04:51:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:53,379 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2830 transitions. [2021-06-05 04:51:53,379 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 04:51:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2830 transitions. [2021-06-05 04:51:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:53,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:53,380 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 04:51:53,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9679,758 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:53,581 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:53,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:53,581 INFO L82 PathProgramCache]: Analyzing trace with hash -525207505, now seen corresponding path program 25 times [2021-06-05 04:51:53,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:53,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288875245] [2021-06-05 04:51:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:53,631 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 04:51:53,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:53,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288875245] [2021-06-05 04:51:53,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288875245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:53,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067117227] [2021-06-05 04:51:53,631 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 04:51:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:53,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:51:53,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:53,868 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 04:51:53,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067117227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:53,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:53,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:51:53,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482705678] [2021-06-05 04:51:53,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:51:53,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:53,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:51:53,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:51:53,869 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 04:51:54,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:54,235 INFO L93 Difference]: Finished difference Result 1106 states and 3473 transitions. [2021-06-05 04:51:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:51:54,235 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 04:51:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:54,236 INFO L225 Difference]: With dead ends: 1106 [2021-06-05 04:51:54,236 INFO L226 Difference]: Without dead ends: 1085 [2021-06-05 04:51:54,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 347.6ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:54,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-06-05 04:51:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 857. [2021-06-05 04:51:54,246 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 04:51:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2819 transitions. [2021-06-05 04:51:54,247 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2819 transitions. Word has length 22 [2021-06-05 04:51:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:54,247 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2819 transitions. [2021-06-05 04:51:54,247 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 04:51:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2819 transitions. [2021-06-05 04:51:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:54,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:54,248 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 04:51:54,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 759 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9685 [2021-06-05 04:51:54,449 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:54,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1853904925, now seen corresponding path program 26 times [2021-06-05 04:51:54,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:54,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564538729] [2021-06-05 04:51:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:54,497 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 04:51:54,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:54,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564538729] [2021-06-05 04:51:54,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564538729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:54,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911246231] [2021-06-05 04:51:54,497 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 04:51:54,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:54,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:54,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:51:54,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:54,737 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 04:51:54,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911246231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:54,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:54,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:51:54,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165143600] [2021-06-05 04:51:54,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:51:54,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:54,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:51:54,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:51:54,738 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 04:51:54,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:54,992 INFO L93 Difference]: Finished difference Result 1081 states and 3404 transitions. [2021-06-05 04:51:54,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:51:54,993 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 04:51:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:54,994 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 04:51:54,994 INFO L226 Difference]: Without dead ends: 1041 [2021-06-05 04:51:54,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:51:54,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-06-05 04:51:55,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 825. [2021-06-05 04:51:55,002 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 04:51:55,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2742 transitions. [2021-06-05 04:51:55,004 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2742 transitions. Word has length 22 [2021-06-05 04:51:55,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:55,004 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2742 transitions. [2021-06-05 04:51:55,004 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 04:51:55,004 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2742 transitions. [2021-06-05 04:51:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:55,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:55,005 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 04:51:55,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 760 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9689 [2021-06-05 04:51:55,206 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:55,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1305500157, now seen corresponding path program 732 times [2021-06-05 04:51:55,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:55,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184398891] [2021-06-05 04:51:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:55,283 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 04:51:55,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:55,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184398891] [2021-06-05 04:51:55,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184398891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:55,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132254554] [2021-06-05 04:51:55,283 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 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 04:51:55,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:51:55,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:55,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:55,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:55,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:55,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:55,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:51:55,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:55,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:55,535 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 13 treesize of output 9 [2021-06-05 04:51:55,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:55,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:55,539 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 12 treesize of output 8 [2021-06-05 04:51:55,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:55,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:51:55,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:55,566 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2021-06-05 04:51:55,567 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 04:51:55,567 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:15 [2021-06-05 04:51:55,610 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 04:51:55,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132254554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:55,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:55,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 04:51:55,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294499734] [2021-06-05 04:51:55,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:51:55,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:55,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:51:55,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:51:55,610 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 04:51:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:55,902 INFO L93 Difference]: Finished difference Result 1202 states and 3846 transitions. [2021-06-05 04:51:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:51:55,902 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 04:51:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:55,904 INFO L225 Difference]: With dead ends: 1202 [2021-06-05 04:51:55,904 INFO L226 Difference]: Without dead ends: 1132 [2021-06-05 04:51:55,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 216.6ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:51:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-06-05 04:51:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 850. [2021-06-05 04:51:55,912 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 04:51:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2836 transitions. [2021-06-05 04:51:55,914 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2836 transitions. Word has length 22 [2021-06-05 04:51:55,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:55,914 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2836 transitions. [2021-06-05 04:51:55,914 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 04:51:55,914 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2836 transitions. [2021-06-05 04:51:55,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:55,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:55,915 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 04:51:56,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9693,761 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:56,115 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:56,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1958577410, now seen corresponding path program 733 times [2021-06-05 04:51:56,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:56,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583338099] [2021-06-05 04:51:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:56,217 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 04:51:56,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:56,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583338099] [2021-06-05 04:51:56,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583338099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:56,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149165543] [2021-06-05 04:51:56,217 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 04:51:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:56,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:56,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:56,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:56,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:51:56,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,538 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 04:51:56,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:56,539 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 12 treesize of output 8 [2021-06-05 04:51:56,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:56,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:51:56,553 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 04:51:56,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 04:51:56,599 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 04:51:56,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149165543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:56,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:56,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:51:56,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535096412] [2021-06-05 04:51:56,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:56,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:56,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:56,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:56,600 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 04:51:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:57,024 INFO L93 Difference]: Finished difference Result 1158 states and 3675 transitions. [2021-06-05 04:51:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:57,025 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 04:51:57,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:57,026 INFO L225 Difference]: With dead ends: 1158 [2021-06-05 04:51:57,026 INFO L226 Difference]: Without dead ends: 1158 [2021-06-05 04:51:57,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 354.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:51:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-06-05 04:51:57,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 865. [2021-06-05 04:51:57,035 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 04:51:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2875 transitions. [2021-06-05 04:51:57,037 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2875 transitions. Word has length 22 [2021-06-05 04:51:57,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:57,037 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2875 transitions. [2021-06-05 04:51:57,037 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 04:51:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2875 transitions. [2021-06-05 04:51:57,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:57,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:57,038 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 04:51:57,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 762 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9710 [2021-06-05 04:51:57,238 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:57,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:57,238 INFO L82 PathProgramCache]: Analyzing trace with hash -799933880, now seen corresponding path program 734 times [2021-06-05 04:51:57,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:57,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955019628] [2021-06-05 04:51:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:57,348 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 04:51:57,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:57,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955019628] [2021-06-05 04:51:57,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955019628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:57,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467253664] [2021-06-05 04:51:57,348 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 04:51:57,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:51:57,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:57,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:57,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:57,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:57,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:57,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:51:57,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:57,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:57,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:57,671 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 04:51:57,671 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:51:57,671 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 04:51:57,671 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 04:51:57,724 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 04:51:57,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467253664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:57,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:57,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:51:57,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529915601] [2021-06-05 04:51:57,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:57,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:57,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:57,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:57,725 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 04:51:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:58,185 INFO L93 Difference]: Finished difference Result 1210 states and 3796 transitions. [2021-06-05 04:51:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:58,185 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 04:51:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:58,187 INFO L225 Difference]: With dead ends: 1210 [2021-06-05 04:51:58,187 INFO L226 Difference]: Without dead ends: 1210 [2021-06-05 04:51:58,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-06-05 04:51:58,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 868. [2021-06-05 04:51:58,197 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 04:51:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2886 transitions. [2021-06-05 04:51:58,198 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2886 transitions. Word has length 22 [2021-06-05 04:51:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:58,198 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2886 transitions. [2021-06-05 04:51:58,198 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 04:51:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2886 transitions. [2021-06-05 04:51:58,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:58,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:58,199 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 04:51:58,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9728,763 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:51:58,400 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:58,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2001125694, now seen corresponding path program 735 times [2021-06-05 04:51:58,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:58,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277221060] [2021-06-05 04:51:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:58,506 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 04:51:58,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:58,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277221060] [2021-06-05 04:51:58,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277221060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:58,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820725027] [2021-06-05 04:51:58,506 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 04:51:58,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:51:58,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:58,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:58,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:51:58,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:58,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:51:58,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:51:58,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:58,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:51:58,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:51:58,840 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 04:51:58,840 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:51:58,840 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 04:51:58,840 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 04:51:58,890 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 04:51:58,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820725027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:58,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:51:58,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:51:58,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499540196] [2021-06-05 04:51:58,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:51:58,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:51:58,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:51:58,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:51:58,891 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 04:51:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:51:59,340 INFO L93 Difference]: Finished difference Result 1167 states and 3693 transitions. [2021-06-05 04:51:59,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:51:59,341 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 04:51:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:51:59,342 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 04:51:59,342 INFO L226 Difference]: Without dead ends: 1161 [2021-06-05 04:51:59,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:51:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-05 04:51:59,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 860. [2021-06-05 04:51:59,352 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 04:51:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2862 transitions. [2021-06-05 04:51:59,353 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2862 transitions. Word has length 22 [2021-06-05 04:51:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:51:59,353 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2862 transitions. [2021-06-05 04:51:59,353 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 04:51:59,353 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2862 transitions. [2021-06-05 04:51:59,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:51:59,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:51:59,354 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 04:51:59,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 764 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9745 [2021-06-05 04:51:59,555 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:51:59,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:51:59,555 INFO L82 PathProgramCache]: Analyzing trace with hash 294157708, now seen corresponding path program 736 times [2021-06-05 04:51:59,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:51:59,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355757946] [2021-06-05 04:51:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:51:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:51:59,674 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 04:51:59,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:51:59,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355757946] [2021-06-05 04:51:59,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355757946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:51:59,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695486183] [2021-06-05 04:51:59,675 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 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 04:51:59,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:51:59,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:51:59,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:51:59,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:00,080 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 04:52:00,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695486183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:00,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:00,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:00,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338764667] [2021-06-05 04:52:00,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:00,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:00,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:00,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:00,081 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 04:52:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:00,617 INFO L93 Difference]: Finished difference Result 1110 states and 3528 transitions. [2021-06-05 04:52:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:00,617 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 04:52:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:00,619 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 04:52:00,619 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 04:52:00,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 506.4ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 04:52:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 866. [2021-06-05 04:52:00,628 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 04:52:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2884 transitions. [2021-06-05 04:52:00,629 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2884 transitions. Word has length 22 [2021-06-05 04:52:00,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:00,629 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2884 transitions. [2021-06-05 04:52:00,629 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 04:52:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2884 transitions. [2021-06-05 04:52:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:00,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:00,630 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 04:52:00,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9762,765 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:00,831 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:00,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:00,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1199750014, now seen corresponding path program 737 times [2021-06-05 04:52:00,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:00,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385800478] [2021-06-05 04:52:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:00,946 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 04:52:00,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:00,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385800478] [2021-06-05 04:52:00,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385800478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:00,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274295139] [2021-06-05 04:52:00,947 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 04:52:01,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:52:01,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:01,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:01,399 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 04:52:01,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274295139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:01,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:01,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:01,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074803292] [2021-06-05 04:52:01,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:01,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:01,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:01,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:01,400 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 04:52:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:01,934 INFO L93 Difference]: Finished difference Result 1116 states and 3535 transitions. [2021-06-05 04:52:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:01,934 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 04:52:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:01,936 INFO L225 Difference]: With dead ends: 1116 [2021-06-05 04:52:01,936 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 04:52:01,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 576.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 04:52:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 863. [2021-06-05 04:52:01,944 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 04:52:01,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2873 transitions. [2021-06-05 04:52:01,946 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2873 transitions. Word has length 22 [2021-06-05 04:52:01,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:01,946 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2873 transitions. [2021-06-05 04:52:01,946 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 04:52:01,946 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2873 transitions. [2021-06-05 04:52:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:01,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:01,947 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 04:52:02,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 766 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9777 [2021-06-05 04:52:02,147 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:02,148 INFO L82 PathProgramCache]: Analyzing trace with hash -661894436, now seen corresponding path program 738 times [2021-06-05 04:52:02,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:02,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220383516] [2021-06-05 04:52:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:02,277 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 04:52:02,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:02,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220383516] [2021-06-05 04:52:02,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220383516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:02,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103770739] [2021-06-05 04:52:02,277 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 04:52:02,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:52:02,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:02,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:02,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:02,706 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 04:52:02,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103770739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:02,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:02,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:02,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077835359] [2021-06-05 04:52:02,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:02,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:02,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:02,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:02,706 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 04:52:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:03,332 INFO L93 Difference]: Finished difference Result 1074 states and 3440 transitions. [2021-06-05 04:52:03,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:03,332 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 04:52:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:03,334 INFO L225 Difference]: With dead ends: 1074 [2021-06-05 04:52:03,334 INFO L226 Difference]: Without dead ends: 1062 [2021-06-05 04:52:03,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 643.3ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-06-05 04:52:03,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 855. [2021-06-05 04:52:03,342 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 04:52:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2849 transitions. [2021-06-05 04:52:03,344 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2849 transitions. Word has length 22 [2021-06-05 04:52:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:03,344 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2849 transitions. [2021-06-05 04:52:03,344 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 04:52:03,344 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2849 transitions. [2021-06-05 04:52:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:03,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:03,345 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 04:52:03,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9791,767 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:03,545 INFO L430 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:03,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:03,546 INFO L82 PathProgramCache]: Analyzing trace with hash -148741432, now seen corresponding path program 739 times [2021-06-05 04:52:03,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:03,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647773206] [2021-06-05 04:52:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:03,658 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 04:52:03,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:03,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647773206] [2021-06-05 04:52:03,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647773206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:03,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672835490] [2021-06-05 04:52:03,658 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 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 04:52:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:03,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:03,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:04,100 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 04:52:04,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672835490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:04,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:04,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:04,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471221158] [2021-06-05 04:52:04,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:04,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:04,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:04,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:04,101 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 04:52:04,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:04,670 INFO L93 Difference]: Finished difference Result 1099 states and 3496 transitions. [2021-06-05 04:52:04,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:04,670 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 04:52:04,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:04,672 INFO L225 Difference]: With dead ends: 1099 [2021-06-05 04:52:04,672 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 04:52:04,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 569.2ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 04:52:04,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 864. [2021-06-05 04:52:04,681 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 04:52:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2882 transitions. [2021-06-05 04:52:04,682 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2882 transitions. Word has length 22 [2021-06-05 04:52:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:04,682 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2882 transitions. [2021-06-05 04:52:04,682 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 04:52:04,682 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2882 transitions. [2021-06-05 04:52:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:04,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:04,683 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 04:52:04,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9808,768 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:04,883 INFO L430 AbstractCegarLoop]: === Iteration 769 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:04,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1642649154, now seen corresponding path program 740 times [2021-06-05 04:52:04,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:04,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726672839] [2021-06-05 04:52:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:04,993 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 04:52:04,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:04,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726672839] [2021-06-05 04:52:04,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726672839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:04,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460113730] [2021-06-05 04:52:04,993 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 04:52:05,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:05,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:05,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:05,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:05,446 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 04:52:05,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460113730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:05,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:05,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:05,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120794504] [2021-06-05 04:52:05,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:05,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:05,447 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 04:52:06,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:06,035 INFO L93 Difference]: Finished difference Result 1105 states and 3503 transitions. [2021-06-05 04:52:06,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:06,036 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 04:52:06,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:06,037 INFO L225 Difference]: With dead ends: 1105 [2021-06-05 04:52:06,037 INFO L226 Difference]: Without dead ends: 1099 [2021-06-05 04:52:06,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 579.5ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-06-05 04:52:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 861. [2021-06-05 04:52:06,046 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 04:52:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2871 transitions. [2021-06-05 04:52:06,048 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2871 transitions. Word has length 22 [2021-06-05 04:52:06,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:06,048 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2871 transitions. [2021-06-05 04:52:06,048 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 04:52:06,048 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2871 transitions. [2021-06-05 04:52:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:06,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:06,049 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 04:52:06,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9823,769 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:06,249 INFO L430 AbstractCegarLoop]: === Iteration 770 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:06,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1104793576, now seen corresponding path program 741 times [2021-06-05 04:52:06,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:06,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296653647] [2021-06-05 04:52:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:06,375 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 04:52:06,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:06,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296653647] [2021-06-05 04:52:06,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296653647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:06,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940143867] [2021-06-05 04:52:06,375 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 04:52:06,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:52:06,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:06,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:06,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:06,805 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 04:52:06,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940143867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:06,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:06,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:06,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667935383] [2021-06-05 04:52:06,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:06,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:06,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:06,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:06,806 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 04:52:07,304 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-05 04:52:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:07,505 INFO L93 Difference]: Finished difference Result 1069 states and 3421 transitions. [2021-06-05 04:52:07,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:07,506 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 04:52:07,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:07,507 INFO L225 Difference]: With dead ends: 1069 [2021-06-05 04:52:07,507 INFO L226 Difference]: Without dead ends: 1057 [2021-06-05 04:52:07,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 716.2ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:07,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-05 04:52:07,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 858. [2021-06-05 04:52:07,516 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 04:52:07,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2860 transitions. [2021-06-05 04:52:07,517 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2860 transitions. Word has length 22 [2021-06-05 04:52:07,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:07,517 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2860 transitions. [2021-06-05 04:52:07,517 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 04:52:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2860 transitions. [2021-06-05 04:52:07,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:07,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:07,518 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 04:52:07,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 770 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9840 [2021-06-05 04:52:07,719 INFO L430 AbstractCegarLoop]: === Iteration 771 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:07,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:07,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1611139842, now seen corresponding path program 742 times [2021-06-05 04:52:07,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:07,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553552829] [2021-06-05 04:52:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:07,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:07,832 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 04:52:07,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:07,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553552829] [2021-06-05 04:52:07,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553552829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:07,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193848421] [2021-06-05 04:52:07,832 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 04:52:07,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:07,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:07,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:07,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:08,316 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 04:52:08,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193848421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:08,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:08,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:08,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340359065] [2021-06-05 04:52:08,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:08,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:08,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:08,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:08,317 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 04:52:08,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:08,947 INFO L93 Difference]: Finished difference Result 1060 states and 3397 transitions. [2021-06-05 04:52:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:08,947 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 04:52:08,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:08,949 INFO L225 Difference]: With dead ends: 1060 [2021-06-05 04:52:08,949 INFO L226 Difference]: Without dead ends: 1042 [2021-06-05 04:52:08,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 687.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:08,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-05 04:52:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 850. [2021-06-05 04:52:08,957 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 04:52:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2836 transitions. [2021-06-05 04:52:08,958 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2836 transitions. Word has length 22 [2021-06-05 04:52:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:08,958 INFO L482 AbstractCegarLoop]: Abstraction has 850 states and 2836 transitions. [2021-06-05 04:52:08,958 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 04:52:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2836 transitions. [2021-06-05 04:52:08,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:08,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:08,959 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 04:52:09,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9858,771 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:09,159 INFO L430 AbstractCegarLoop]: === Iteration 772 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:09,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:09,160 INFO L82 PathProgramCache]: Analyzing trace with hash 711432611, now seen corresponding path program 743 times [2021-06-05 04:52:09,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:09,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377491159] [2021-06-05 04:52:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:09,242 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 04:52:09,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:09,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377491159] [2021-06-05 04:52:09,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377491159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:09,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170178458] [2021-06-05 04:52:09,242 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 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 04:52:09,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:52:09,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:09,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:09,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:09,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:09,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:09,482 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-06-05 04:52:09,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:09,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:09,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:09,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:09,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:09,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:09,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:09,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:09,512 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2021-06-05 04:52:09,513 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 04:52:09,513 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:78, output treesize:15 [2021-06-05 04:52:09,556 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 04:52:09,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170178458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:09,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:09,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 04:52:09,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874503201] [2021-06-05 04:52:09,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:09,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:09,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:09,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:09,556 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 04:52:09,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:09,898 INFO L93 Difference]: Finished difference Result 1304 states and 4164 transitions. [2021-06-05 04:52:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:52:09,898 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 04:52:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:09,900 INFO L225 Difference]: With dead ends: 1304 [2021-06-05 04:52:09,900 INFO L226 Difference]: Without dead ends: 1234 [2021-06-05 04:52:09,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:52:09,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-06-05 04:52:09,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 857. [2021-06-05 04:52:09,909 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 04:52:09,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2865 transitions. [2021-06-05 04:52:09,910 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2865 transitions. Word has length 22 [2021-06-05 04:52:09,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:09,910 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2865 transitions. [2021-06-05 04:52:09,910 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 04:52:09,910 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2865 transitions. [2021-06-05 04:52:09,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:09,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:09,911 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 04:52:10,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9871,772 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:10,112 INFO L430 AbstractCegarLoop]: === Iteration 773 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:10,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1937291592, now seen corresponding path program 744 times [2021-06-05 04:52:10,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:10,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288114107] [2021-06-05 04:52:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:10,239 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 04:52:10,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:10,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288114107] [2021-06-05 04:52:10,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288114107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:10,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016720715] [2021-06-05 04:52:10,239 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 04:52:10,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:52:10,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:10,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:10,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:10,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:10,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:10,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:10,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:10,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:10,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:10,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:10,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:10,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:10,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:10,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:10,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:10,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:10,599 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 04:52:10,599 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:73, output treesize:6 [2021-06-05 04:52:10,648 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 04:52:10,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016720715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:10,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:10,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:10,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662956462] [2021-06-05 04:52:10,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:10,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:10,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:10,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:10,649 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 04:52:11,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:11,138 INFO L93 Difference]: Finished difference Result 1191 states and 3776 transitions. [2021-06-05 04:52:11,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:11,138 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 04:52:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:11,140 INFO L225 Difference]: With dead ends: 1191 [2021-06-05 04:52:11,140 INFO L226 Difference]: Without dead ends: 1191 [2021-06-05 04:52:11,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 457.5ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:11,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-06-05 04:52:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 867. [2021-06-05 04:52:11,149 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 04:52:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2891 transitions. [2021-06-05 04:52:11,150 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2891 transitions. Word has length 22 [2021-06-05 04:52:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:11,151 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2891 transitions. [2021-06-05 04:52:11,151 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 04:52:11,151 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2891 transitions. [2021-06-05 04:52:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:11,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:11,152 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 04:52:11,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9889,773 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:11,352 INFO L430 AbstractCegarLoop]: === Iteration 774 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:11,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:11,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1199032174, now seen corresponding path program 745 times [2021-06-05 04:52:11,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:11,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369607622] [2021-06-05 04:52:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:11,477 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 04:52:11,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:11,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369607622] [2021-06-05 04:52:11,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369607622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:11,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894093769] [2021-06-05 04:52:11,477 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 04:52:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:11,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:11,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:11,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:11,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:11,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:11,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:11,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:11,801 INFO L628 ElimStorePlain]: treesize reduction 21, result has 38.2 percent of original size [2021-06-05 04:52:11,801 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:52:11,802 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 04:52:11,802 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 04:52:11,855 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 04:52:11,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894093769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:11,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:11,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:11,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005039884] [2021-06-05 04:52:11,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:11,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:11,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:11,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:11,855 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 04:52:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:12,316 INFO L93 Difference]: Finished difference Result 1243 states and 3897 transitions. [2021-06-05 04:52:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:12,316 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 04:52:12,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:12,317 INFO L225 Difference]: With dead ends: 1243 [2021-06-05 04:52:12,317 INFO L226 Difference]: Without dead ends: 1243 [2021-06-05 04:52:12,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 426.3ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-06-05 04:52:12,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 870. [2021-06-05 04:52:12,327 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 04:52:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2902 transitions. [2021-06-05 04:52:12,329 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2902 transitions. Word has length 22 [2021-06-05 04:52:12,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:12,329 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2902 transitions. [2021-06-05 04:52:12,329 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 04:52:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2902 transitions. [2021-06-05 04:52:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:12,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:12,330 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 04:52:12,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9907,774 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:12,530 INFO L430 AbstractCegarLoop]: === Iteration 775 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:12,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1602027400, now seen corresponding path program 746 times [2021-06-05 04:52:12,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:12,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486115098] [2021-06-05 04:52:12,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:12,644 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 04:52:12,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:12,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486115098] [2021-06-05 04:52:12,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486115098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:12,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423044704] [2021-06-05 04:52:12,644 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 04:52:12,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:12,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:12,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:12,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:12,972 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 15 treesize of output 1 [2021-06-05 04:52:12,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:12,988 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 04:52:12,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:12,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:12,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:12,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:12,996 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 04:52:12,996 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:54, output treesize:6 [2021-06-05 04:52:13,047 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 04:52:13,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423044704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:13,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:13,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:13,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341322537] [2021-06-05 04:52:13,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:13,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:13,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:13,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:13,048 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 04:52:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:13,494 INFO L93 Difference]: Finished difference Result 1200 states and 3794 transitions. [2021-06-05 04:52:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:13,495 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 04:52:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:13,496 INFO L225 Difference]: With dead ends: 1200 [2021-06-05 04:52:13,496 INFO L226 Difference]: Without dead ends: 1194 [2021-06-05 04:52:13,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-06-05 04:52:13,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 862. [2021-06-05 04:52:13,505 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 04:52:13,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2878 transitions. [2021-06-05 04:52:13,506 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2878 transitions. Word has length 22 [2021-06-05 04:52:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:13,507 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2878 transitions. [2021-06-05 04:52:13,507 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 04:52:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2878 transitions. [2021-06-05 04:52:13,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:13,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:13,508 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 04:52:13,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9923,775 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:13,708 INFO L430 AbstractCegarLoop]: === Iteration 776 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:13,708 INFO L82 PathProgramCache]: Analyzing trace with hash -104940586, now seen corresponding path program 747 times [2021-06-05 04:52:13,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:13,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696081536] [2021-06-05 04:52:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:13,859 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 04:52:13,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:13,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696081536] [2021-06-05 04:52:13,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696081536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:13,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148356406] [2021-06-05 04:52:13,860 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 04:52:13,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:52:13,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:13,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:13,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:14,304 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 04:52:14,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148356406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:14,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:14,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:14,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473734667] [2021-06-05 04:52:14,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:14,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:14,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:14,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:14,304 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 04:52:14,916 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 04:52:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:15,003 INFO L93 Difference]: Finished difference Result 1143 states and 3629 transitions. [2021-06-05 04:52:15,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:15,003 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 04:52:15,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:15,005 INFO L225 Difference]: With dead ends: 1143 [2021-06-05 04:52:15,005 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 04:52:15,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 707.7ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:15,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 04:52:15,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 868. [2021-06-05 04:52:15,013 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 04:52:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2900 transitions. [2021-06-05 04:52:15,015 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2900 transitions. Word has length 22 [2021-06-05 04:52:15,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:15,015 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2900 transitions. [2021-06-05 04:52:15,015 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 04:52:15,015 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2900 transitions. [2021-06-05 04:52:15,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:15,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:15,016 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 04:52:15,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 776 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9940 [2021-06-05 04:52:15,216 INFO L430 AbstractCegarLoop]: === Iteration 777 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:15,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1598848308, now seen corresponding path program 748 times [2021-06-05 04:52:15,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:15,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603901483] [2021-06-05 04:52:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:15,354 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 04:52:15,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:15,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603901483] [2021-06-05 04:52:15,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603901483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:15,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090712379] [2021-06-05 04:52:15,354 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 04:52:15,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:15,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:15,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:15,812 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 04:52:15,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090712379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:15,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:15,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:15,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435136374] [2021-06-05 04:52:15,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:15,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:15,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:15,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:15,813 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 04:52:16,398 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 04:52:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:16,481 INFO L93 Difference]: Finished difference Result 1149 states and 3636 transitions. [2021-06-05 04:52:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:16,481 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 04:52:16,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:16,483 INFO L225 Difference]: With dead ends: 1149 [2021-06-05 04:52:16,483 INFO L226 Difference]: Without dead ends: 1143 [2021-06-05 04:52:16,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 715.0ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-06-05 04:52:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 865. [2021-06-05 04:52:16,493 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 04:52:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2889 transitions. [2021-06-05 04:52:16,494 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2889 transitions. Word has length 22 [2021-06-05 04:52:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:16,494 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2889 transitions. [2021-06-05 04:52:16,494 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 04:52:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2889 transitions. [2021-06-05 04:52:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:16,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:16,495 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 04:52:16,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9957,777 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:16,705 INFO L430 AbstractCegarLoop]: === Iteration 778 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1060992730, now seen corresponding path program 749 times [2021-06-05 04:52:16,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:16,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127463065] [2021-06-05 04:52:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:16,870 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 04:52:16,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:16,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127463065] [2021-06-05 04:52:16,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127463065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:16,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882402875] [2021-06-05 04:52:16,871 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 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 04:52:17,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:17,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:17,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:17,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:17,369 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 04:52:17,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882402875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:17,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:17,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:17,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700868840] [2021-06-05 04:52:17,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:17,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:17,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:17,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:17,369 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 04:52:18,011 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2021-06-05 04:52:18,208 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2021-06-05 04:52:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:18,235 INFO L93 Difference]: Finished difference Result 1107 states and 3541 transitions. [2021-06-05 04:52:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:18,235 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 04:52:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:18,236 INFO L225 Difference]: With dead ends: 1107 [2021-06-05 04:52:18,236 INFO L226 Difference]: Without dead ends: 1095 [2021-06-05 04:52:18,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 946.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:18,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-06-05 04:52:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 857. [2021-06-05 04:52:18,245 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 04:52:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2865 transitions. [2021-06-05 04:52:18,246 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2865 transitions. Word has length 22 [2021-06-05 04:52:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:18,246 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2865 transitions. [2021-06-05 04:52:18,246 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 04:52:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2865 transitions. [2021-06-05 04:52:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:18,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:18,247 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 04:52:18,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9978,778 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:18,464 INFO L430 AbstractCegarLoop]: === Iteration 779 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:18,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:18,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1469231619, now seen corresponding path program 750 times [2021-06-05 04:52:18,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:18,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300578574] [2021-06-05 04:52:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:18,573 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 04:52:18,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:18,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300578574] [2021-06-05 04:52:18,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300578574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:18,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097028056] [2021-06-05 04:52:18,574 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 04:52:18,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:52:18,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:18,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:18,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:18,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:18,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:18,853 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-06-05 04:52:18,853 INFO L518 ElimStorePlain]: Eliminatee v_prenex_874 vanished before elimination [2021-06-05 04:52:18,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:18,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:18,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:18,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:18,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:18,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:18,890 INFO L628 ElimStorePlain]: treesize reduction 1, result has 97.4 percent of original size [2021-06-05 04:52:18,891 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 04:52:18,891 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:105, output treesize:21 [2021-06-05 04:52:18,961 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 04:52:18,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097028056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:18,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:18,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 04:52:18,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982779389] [2021-06-05 04:52:18,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:18,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:18,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:18,962 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 04:52:19,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:19,424 INFO L93 Difference]: Finished difference Result 1424 states and 4477 transitions. [2021-06-05 04:52:19,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:52:19,425 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 04:52:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:19,426 INFO L225 Difference]: With dead ends: 1424 [2021-06-05 04:52:19,426 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 04:52:19,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 401.7ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:19,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 04:52:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 864. [2021-06-05 04:52:19,436 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 04:52:19,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2901 transitions. [2021-06-05 04:52:19,438 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2901 transitions. Word has length 22 [2021-06-05 04:52:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:19,438 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2901 transitions. [2021-06-05 04:52:19,438 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 04:52:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2901 transitions. [2021-06-05 04:52:19,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:19,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:19,439 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 04:52:19,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 779 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9994 [2021-06-05 04:52:19,639 INFO L430 AbstractCegarLoop]: === Iteration 780 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:19,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1816360514, now seen corresponding path program 751 times [2021-06-05 04:52:19,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:19,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313657372] [2021-06-05 04:52:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:19,767 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 04:52:19,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:19,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313657372] [2021-06-05 04:52:19,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313657372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:19,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172462276] [2021-06-05 04:52:19,767 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 04:52:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:19,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:19,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:20,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:20,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:20,061 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 13 treesize of output 9 [2021-06-05 04:52:20,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:20,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:20,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:20,129 INFO L628 ElimStorePlain]: treesize reduction 33, result has 70.3 percent of original size [2021-06-05 04:52:20,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:20,132 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:20,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:20,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:20,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:20,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:20,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:20,164 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:20,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:20,190 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 04:52:20,190 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:144, output treesize:22 [2021-06-05 04:52:20,268 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 04:52:20,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172462276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:20,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:20,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:20,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330693398] [2021-06-05 04:52:20,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:20,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:20,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:20,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:20,269 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 04:52:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:20,767 INFO L93 Difference]: Finished difference Result 1384 states and 4338 transitions. [2021-06-05 04:52:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:20,767 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 04:52:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:20,769 INFO L225 Difference]: With dead ends: 1384 [2021-06-05 04:52:20,769 INFO L226 Difference]: Without dead ends: 1384 [2021-06-05 04:52:20,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:20,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-06-05 04:52:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 876. [2021-06-05 04:52:20,779 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 04:52:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2942 transitions. [2021-06-05 04:52:20,781 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2942 transitions. Word has length 22 [2021-06-05 04:52:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:20,781 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2942 transitions. [2021-06-05 04:52:20,781 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 04:52:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2942 transitions. [2021-06-05 04:52:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:20,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:20,782 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 04:52:20,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 780 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10011 [2021-06-05 04:52:20,982 INFO L430 AbstractCegarLoop]: === Iteration 781 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:20,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:20,982 INFO L82 PathProgramCache]: Analyzing trace with hash -657716984, now seen corresponding path program 752 times [2021-06-05 04:52:20,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:20,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126864978] [2021-06-05 04:52:20,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:21,099 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 04:52:21,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:21,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126864978] [2021-06-05 04:52:21,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126864978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:21,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317065466] [2021-06-05 04:52:21,100 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 04:52:21,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:21,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:21,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:21,388 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 04:52:21,392 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 6 treesize of output 4 [2021-06-05 04:52:21,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,518 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 04:52:21,518 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-06-05 04:52:21,522 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 6 treesize of output 4 [2021-06-05 04:52:21,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:21,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:21,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:21,636 INFO L518 ElimStorePlain]: Eliminatee v_prenex_889 vanished before elimination [2021-06-05 04:52:21,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:21,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:21,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:21,644 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:21,700 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 6 treesize of output 4 [2021-06-05 04:52:21,701 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:21,704 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 13 treesize of output 9 [2021-06-05 04:52:21,705 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:21,786 INFO L628 ElimStorePlain]: treesize reduction 15, result has 85.6 percent of original size [2021-06-05 04:52:21,788 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 04:52:21,788 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 04:52:21,875 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 04:52:21,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317065466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:21,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:21,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:21,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34228873] [2021-06-05 04:52:21,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:21,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:21,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:21,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:21,876 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 04:52:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:22,361 INFO L93 Difference]: Finished difference Result 1416 states and 4397 transitions. [2021-06-05 04:52:22,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:22,361 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 04:52:22,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:22,363 INFO L225 Difference]: With dead ends: 1416 [2021-06-05 04:52:22,363 INFO L226 Difference]: Without dead ends: 1416 [2021-06-05 04:52:22,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 422.0ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:22,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2021-06-05 04:52:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 882. [2021-06-05 04:52:22,374 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 04:52:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2967 transitions. [2021-06-05 04:52:22,376 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2967 transitions. Word has length 22 [2021-06-05 04:52:22,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:22,376 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2967 transitions. [2021-06-05 04:52:22,376 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 04:52:22,376 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2967 transitions. [2021-06-05 04:52:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:22,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:22,377 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 04:52:22,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10032,781 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:22,577 INFO L430 AbstractCegarLoop]: === Iteration 782 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:22,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2143342590, now seen corresponding path program 753 times [2021-06-05 04:52:22,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:22,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297686384] [2021-06-05 04:52:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:22,692 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 04:52:22,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:22,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297686384] [2021-06-05 04:52:22,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297686384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:22,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723130617] [2021-06-05 04:52:22,692 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 04:52:22,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:52:22,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:22,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:52:22,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:23,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:23,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:23,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:23,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 04:52:23,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:23,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:23,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 04:52:23,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:23,094 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 12 treesize of output 8 [2021-06-05 04:52:23,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:23,103 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:23,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 04:52:23,105 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-05 04:52:23,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:23,109 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:23,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:23,203 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 04:52:23,203 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:207, output treesize:116 [2021-06-05 04:52:23,422 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 04:52:23,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723130617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:23,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:23,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:52:23,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950133930] [2021-06-05 04:52:23,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:52:23,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:23,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:52:23,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:52:23,423 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 04:52:24,259 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2021-06-05 04:52:24,512 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 72 [2021-06-05 04:52:24,897 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-06-05 04:52:25,107 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-06-05 04:52:25,251 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-05 04:52:25,491 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2021-06-05 04:52:25,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:25,932 INFO L93 Difference]: Finished difference Result 2391 states and 7250 transitions. [2021-06-05 04:52:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:52:25,933 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 04:52:25,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:25,935 INFO L225 Difference]: With dead ends: 2391 [2021-06-05 04:52:25,935 INFO L226 Difference]: Without dead ends: 2189 [2021-06-05 04:52:25,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2434.6ms TimeCoverageRelationStatistics Valid=285, Invalid=1121, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:52:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-06-05 04:52:25,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1017. [2021-06-05 04:52:25,950 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 04:52:25,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3534 transitions. [2021-06-05 04:52:25,952 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3534 transitions. Word has length 22 [2021-06-05 04:52:25,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:25,952 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3534 transitions. [2021-06-05 04:52:25,952 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 04:52:25,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3534 transitions. [2021-06-05 04:52:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:25,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:25,953 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 04:52:26,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10050,782 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:26,154 INFO L430 AbstractCegarLoop]: === Iteration 783 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:26,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:26,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1405848029, now seen corresponding path program 754 times [2021-06-05 04:52:26,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:26,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600175268] [2021-06-05 04:52:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:26,241 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 04:52:26,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:26,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600175268] [2021-06-05 04:52:26,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600175268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:26,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028345976] [2021-06-05 04:52:26,241 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 04:52:26,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:26,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:26,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:26,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:26,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:26,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:26,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:26,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:26,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:26,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:26,515 INFO L628 ElimStorePlain]: treesize reduction 28, result has 61.1 percent of original size [2021-06-05 04:52:26,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:26,518 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 12 treesize of output 8 [2021-06-05 04:52:26,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:26,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:26,535 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 04:52:26,535 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:105, output treesize:21 [2021-06-05 04:52:26,600 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 04:52:26,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028345976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:26,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:26,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 04:52:26,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057961361] [2021-06-05 04:52:26,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:52:26,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:26,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:52:26,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:52:26,601 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 04:52:27,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:27,029 INFO L93 Difference]: Finished difference Result 1448 states and 4722 transitions. [2021-06-05 04:52:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:27,029 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 04:52:27,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:27,031 INFO L225 Difference]: With dead ends: 1448 [2021-06-05 04:52:27,031 INFO L226 Difference]: Without dead ends: 1364 [2021-06-05 04:52:27,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 334.4ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-06-05 04:52:27,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1017. [2021-06-05 04:52:27,042 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 04:52:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 3527 transitions. [2021-06-05 04:52:27,044 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 3527 transitions. Word has length 22 [2021-06-05 04:52:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:27,044 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 3527 transitions. [2021-06-05 04:52:27,044 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 04:52:27,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 3527 transitions. [2021-06-05 04:52:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:27,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:27,045 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 04:52:27,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 783 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10075 [2021-06-05 04:52:27,245 INFO L430 AbstractCegarLoop]: === Iteration 784 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:27,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:27,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2216584, now seen corresponding path program 755 times [2021-06-05 04:52:27,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:27,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935663731] [2021-06-05 04:52:27,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:27,369 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 04:52:27,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:27,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935663731] [2021-06-05 04:52:27,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935663731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:27,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381009766] [2021-06-05 04:52:27,369 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 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 04:52:27,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:52:27,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:27,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:27,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:27,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:27,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:27,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:27,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:27,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:27,712 INFO L628 ElimStorePlain]: treesize reduction 61, result has 42.5 percent of original size [2021-06-05 04:52:27,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:27,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:27,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:27,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:27,729 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:52:27,730 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 04:52:27,730 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 04:52:27,812 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 04:52:27,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381009766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:27,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:27,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:27,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826021355] [2021-06-05 04:52:27,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:27,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:27,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:27,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:27,813 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 04:52:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:28,244 INFO L93 Difference]: Finished difference Result 1483 states and 4798 transitions. [2021-06-05 04:52:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:28,244 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 04:52:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:28,246 INFO L225 Difference]: With dead ends: 1483 [2021-06-05 04:52:28,246 INFO L226 Difference]: Without dead ends: 1483 [2021-06-05 04:52:28,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 388.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:28,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-06-05 04:52:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1021. [2021-06-05 04:52:28,257 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 04:52:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3538 transitions. [2021-06-05 04:52:28,259 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3538 transitions. Word has length 22 [2021-06-05 04:52:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:28,259 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 3538 transitions. [2021-06-05 04:52:28,259 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 04:52:28,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3538 transitions. [2021-06-05 04:52:28,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:28,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:28,260 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 04:52:28,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 784 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10100 [2021-06-05 04:52:28,461 INFO L430 AbstractCegarLoop]: === Iteration 785 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1635267976, now seen corresponding path program 756 times [2021-06-05 04:52:28,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:28,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500026982] [2021-06-05 04:52:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:28,584 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 04:52:28,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:28,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500026982] [2021-06-05 04:52:28,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500026982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:28,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115493661] [2021-06-05 04:52:28,584 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 04:52:28,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:52:28,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:28,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:28,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:28,890 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 04:52:28,895 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 6 treesize of output 4 [2021-06-05 04:52:28,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:29,019 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 04:52:29,019 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-06-05 04:52:29,022 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 6 treesize of output 4 [2021-06-05 04:52:29,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:29,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:29,083 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 5 treesize of output 3 [2021-06-05 04:52:29,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:29,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:29,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:29,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:29,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:29,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:29,145 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:29,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:29,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:29,187 INFO L518 ElimStorePlain]: Eliminatee v_prenex_902 vanished before elimination [2021-06-05 04:52:29,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:29,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:29,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:29,191 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:29,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:29,194 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:29,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:29,232 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 04:52:29,232 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 04:52:29,329 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 04:52:29,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115493661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:29,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:29,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:29,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597480689] [2021-06-05 04:52:29,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:29,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:29,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:29,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:29,329 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 04:52:29,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:29,854 INFO L93 Difference]: Finished difference Result 1421 states and 4671 transitions. [2021-06-05 04:52:29,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:52:29,854 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 04:52:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:29,856 INFO L225 Difference]: With dead ends: 1421 [2021-06-05 04:52:29,856 INFO L226 Difference]: Without dead ends: 1421 [2021-06-05 04:52:29,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-06-05 04:52:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1018. [2021-06-05 04:52:29,873 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 04:52:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 3530 transitions. [2021-06-05 04:52:29,875 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 3530 transitions. Word has length 22 [2021-06-05 04:52:29,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:29,875 INFO L482 AbstractCegarLoop]: Abstraction has 1018 states and 3530 transitions. [2021-06-05 04:52:29,875 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 04:52:29,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 3530 transitions. [2021-06-05 04:52:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:29,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:29,876 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 04:52:30,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10120,785 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:30,076 INFO L430 AbstractCegarLoop]: === Iteration 786 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:30,077 INFO L82 PathProgramCache]: Analyzing trace with hash 967081110, now seen corresponding path program 757 times [2021-06-05 04:52:30,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:30,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194500919] [2021-06-05 04:52:30,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:30,213 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 04:52:30,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:30,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194500919] [2021-06-05 04:52:30,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194500919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:30,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265095492] [2021-06-05 04:52:30,213 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 04:52:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:30,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:30,512 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 04:52:30,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:30,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:30,642 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 04:52:30,643 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.4 percent of original size [2021-06-05 04:52:30,646 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 5 treesize of output 3 [2021-06-05 04:52:30,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:30,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:30,706 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 6 treesize of output 4 [2021-06-05 04:52:30,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:30,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:30,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:30,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:30,765 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 13 treesize of output 9 [2021-06-05 04:52:30,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:30,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:30,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:30,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:30,810 INFO L518 ElimStorePlain]: Eliminatee v_prenex_914 vanished before elimination [2021-06-05 04:52:30,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:30,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:30,814 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 04:52:30,814 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:30,817 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 5 treesize of output 3 [2021-06-05 04:52:30,818 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:30,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:30,855 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 04:52:30,856 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 04:52:30,953 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 04:52:30,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265095492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:30,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:30,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:52:30,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509012976] [2021-06-05 04:52:30,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:52:30,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:30,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:52:30,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:52:30,953 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 04:52:31,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:31,487 INFO L93 Difference]: Finished difference Result 1515 states and 4901 transitions. [2021-06-05 04:52:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:31,487 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 04:52:31,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:31,490 INFO L225 Difference]: With dead ends: 1515 [2021-06-05 04:52:31,490 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 04:52:31,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 525.6ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 04:52:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1026. [2021-06-05 04:52:31,501 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 04:52:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 3566 transitions. [2021-06-05 04:52:31,503 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 3566 transitions. Word has length 22 [2021-06-05 04:52:31,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:31,503 INFO L482 AbstractCegarLoop]: Abstraction has 1026 states and 3566 transitions. [2021-06-05 04:52:31,503 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 04:52:31,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 3566 transitions. [2021-06-05 04:52:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:31,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:31,505 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 04:52:31,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10138,786 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:31,705 INFO L430 AbstractCegarLoop]: === Iteration 787 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash -526826612, now seen corresponding path program 758 times [2021-06-05 04:52:31,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:31,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87225834] [2021-06-05 04:52:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:31,826 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 04:52:31,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:31,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87225834] [2021-06-05 04:52:31,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87225834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:31,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452055117] [2021-06-05 04:52:31,826 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 04:52:31,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:31,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:31,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:32,114 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 04:52:32,118 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 5 treesize of output 3 [2021-06-05 04:52:32,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,247 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-06-05 04:52:32,247 INFO L628 ElimStorePlain]: treesize reduction 61, result has 70.5 percent of original size [2021-06-05 04:52:32,250 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 04:52:32,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:32,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:32,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:32,363 INFO L518 ElimStorePlain]: Eliminatee v_prenex_921 vanished before elimination [2021-06-05 04:52:32,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:52:32,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:32,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:32,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:32,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:32,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:32,433 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 13 treesize of output 9 [2021-06-05 04:52:32,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:32,437 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:32,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:32,475 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 04:52:32,476 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 12 variables, input treesize:212, output treesize:29 [2021-06-05 04:52:32,570 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 04:52:32,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452055117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:32,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:32,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:32,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991737244] [2021-06-05 04:52:32,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:32,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:32,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:32,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:32,570 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 04:52:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:33,092 INFO L93 Difference]: Finished difference Result 1510 states and 4883 transitions. [2021-06-05 04:52:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:33,092 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 04:52:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:33,094 INFO L225 Difference]: With dead ends: 1510 [2021-06-05 04:52:33,094 INFO L226 Difference]: Without dead ends: 1504 [2021-06-05 04:52:33,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2021-06-05 04:52:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1023. [2021-06-05 04:52:33,105 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 04:52:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3555 transitions. [2021-06-05 04:52:33,107 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3555 transitions. Word has length 22 [2021-06-05 04:52:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:33,107 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 3555 transitions. [2021-06-05 04:52:33,107 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 04:52:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3555 transitions. [2021-06-05 04:52:33,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:33,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:33,108 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 04:52:33,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 787 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10156 [2021-06-05 04:52:33,309 INFO L430 AbstractCegarLoop]: === Iteration 788 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:33,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:33,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1718481548, now seen corresponding path program 759 times [2021-06-05 04:52:33,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:33,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579196356] [2021-06-05 04:52:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:33,441 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 04:52:33,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:33,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579196356] [2021-06-05 04:52:33,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579196356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:33,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195174174] [2021-06-05 04:52:33,441 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 04:52:33,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:52:33,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:33,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:33,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:33,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:33,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:33,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:33,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:33,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:33,800 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-06-05 04:52:33,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:33,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:33,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:33,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:33,806 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:33,806 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:33,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:52:33,821 INFO L518 ElimStorePlain]: Eliminatee v_prenex_930 vanished before elimination [2021-06-05 04:52:33,821 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 04:52:33,822 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 04:52:33,920 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 04:52:33,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195174174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:33,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:33,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:33,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396096933] [2021-06-05 04:52:33,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:33,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:33,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:33,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:33,921 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 04:52:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:34,486 INFO L93 Difference]: Finished difference Result 1535 states and 4949 transitions. [2021-06-05 04:52:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:52:34,486 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 04:52:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:34,488 INFO L225 Difference]: With dead ends: 1535 [2021-06-05 04:52:34,488 INFO L226 Difference]: Without dead ends: 1535 [2021-06-05 04:52:34,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 527.3ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:34,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-06-05 04:52:34,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1019. [2021-06-05 04:52:34,500 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 04:52:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3535 transitions. [2021-06-05 04:52:34,502 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3535 transitions. Word has length 22 [2021-06-05 04:52:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:34,502 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 3535 transitions. [2021-06-05 04:52:34,502 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 04:52:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3535 transitions. [2021-06-05 04:52:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:34,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:34,503 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 04:52:34,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10174,788 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:34,703 INFO L430 AbstractCegarLoop]: === Iteration 789 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:34,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:34,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1739218076, now seen corresponding path program 760 times [2021-06-05 04:52:34,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:34,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631725639] [2021-06-05 04:52:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:34,836 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 04:52:34,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:34,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631725639] [2021-06-05 04:52:34,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631725639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:34,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700055396] [2021-06-05 04:52:34,837 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 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 04:52:34,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:34,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:34,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:34,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:35,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:35,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:35,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:35,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:35,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:52:35,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:35,205 INFO L628 ElimStorePlain]: treesize reduction 29, result has 70.4 percent of original size [2021-06-05 04:52:35,206 INFO L518 ElimStorePlain]: Eliminatee v_prenex_934 vanished before elimination [2021-06-05 04:52:35,208 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 6 treesize of output 4 [2021-06-05 04:52:35,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:35,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:35,211 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 13 treesize of output 9 [2021-06-05 04:52:35,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:35,245 INFO L628 ElimStorePlain]: treesize reduction 13, result has 74.5 percent of original size [2021-06-05 04:52:35,246 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 04:52:35,246 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:124, output treesize:22 [2021-06-05 04:52:35,344 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 04:52:35,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700055396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:35,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:35,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:35,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421678880] [2021-06-05 04:52:35,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:35,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:35,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:35,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:35,345 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 04:52:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:35,883 INFO L93 Difference]: Finished difference Result 1429 states and 4686 transitions. [2021-06-05 04:52:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:52:35,883 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 04:52:35,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:35,885 INFO L225 Difference]: With dead ends: 1429 [2021-06-05 04:52:35,885 INFO L226 Difference]: Without dead ends: 1423 [2021-06-05 04:52:35,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:35,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-06-05 04:52:35,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1019. [2021-06-05 04:52:35,896 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 04:52:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 3535 transitions. [2021-06-05 04:52:35,898 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 3535 transitions. Word has length 22 [2021-06-05 04:52:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:35,898 INFO L482 AbstractCegarLoop]: Abstraction has 1019 states and 3535 transitions. [2021-06-05 04:52:35,898 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 04:52:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 3535 transitions. [2021-06-05 04:52:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:35,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:35,899 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 04:52:36,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10195,789 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:36,100 INFO L430 AbstractCegarLoop]: === Iteration 790 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:36,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:36,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1275807224, now seen corresponding path program 761 times [2021-06-05 04:52:36,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:36,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299320191] [2021-06-05 04:52:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:36,259 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 04:52:36,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:36,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299320191] [2021-06-05 04:52:36,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299320191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:36,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425960144] [2021-06-05 04:52:36,259 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 04:52:36,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:36,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:36,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:36,798 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 04:52:36,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425960144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:36,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:36,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:36,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414639883] [2021-06-05 04:52:36,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:36,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:36,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:36,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:36,798 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 04:52:37,303 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-05 04:52:37,551 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2021-06-05 04:52:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:37,648 INFO L93 Difference]: Finished difference Result 1291 states and 4263 transitions. [2021-06-05 04:52:37,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:37,648 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 04:52:37,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:37,650 INFO L225 Difference]: With dead ends: 1291 [2021-06-05 04:52:37,650 INFO L226 Difference]: Without dead ends: 1291 [2021-06-05 04:52:37,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 904.8ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-06-05 04:52:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1026. [2021-06-05 04:52:37,660 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 04:52:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 3562 transitions. [2021-06-05 04:52:37,662 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 3562 transitions. Word has length 22 [2021-06-05 04:52:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:37,662 INFO L482 AbstractCegarLoop]: Abstraction has 1026 states and 3562 transitions. [2021-06-05 04:52:37,662 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 04:52:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 3562 transitions. [2021-06-05 04:52:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:37,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:37,663 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 04:52:37,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 790 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10220 [2021-06-05 04:52:37,880 INFO L430 AbstractCegarLoop]: === Iteration 791 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:37,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1525252350, now seen corresponding path program 762 times [2021-06-05 04:52:37,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:37,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564631893] [2021-06-05 04:52:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:38,059 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 04:52:38,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:38,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564631893] [2021-06-05 04:52:38,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564631893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:38,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512385503] [2021-06-05 04:52:38,060 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 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 04:52:38,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:52:38,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:38,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:38,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:38,582 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 04:52:38,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512385503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:38,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:38,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:38,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60419102] [2021-06-05 04:52:38,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:38,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:38,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:38,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:38,583 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 04:52:39,094 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 97 [2021-06-05 04:52:39,335 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2021-06-05 04:52:39,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:39,437 INFO L93 Difference]: Finished difference Result 1297 states and 4270 transitions. [2021-06-05 04:52:39,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:39,437 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 04:52:39,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:39,439 INFO L225 Difference]: With dead ends: 1297 [2021-06-05 04:52:39,439 INFO L226 Difference]: Without dead ends: 1291 [2021-06-05 04:52:39,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 920.7ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:39,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-06-05 04:52:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1023. [2021-06-05 04:52:39,449 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 04:52:39,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3551 transitions. [2021-06-05 04:52:39,450 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3551 transitions. Word has length 22 [2021-06-05 04:52:39,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:39,451 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 3551 transitions. [2021-06-05 04:52:39,451 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 04:52:39,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3551 transitions. [2021-06-05 04:52:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:39,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:39,452 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 04:52:39,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 791 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10237 [2021-06-05 04:52:39,652 INFO L430 AbstractCegarLoop]: === Iteration 792 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2063107928, now seen corresponding path program 763 times [2021-06-05 04:52:39,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:39,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128142623] [2021-06-05 04:52:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:39,819 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 04:52:39,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:39,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128142623] [2021-06-05 04:52:39,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128142623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:39,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703241002] [2021-06-05 04:52:39,819 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 04:52:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:39,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:39,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:40,382 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 04:52:40,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703241002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:40,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:40,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:40,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304303446] [2021-06-05 04:52:40,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:40,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:40,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:40,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:40,382 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 04:52:40,892 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 97 [2021-06-05 04:52:41,133 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 85 [2021-06-05 04:52:41,352 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 60 [2021-06-05 04:52:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:41,379 INFO L93 Difference]: Finished difference Result 1261 states and 4188 transitions. [2021-06-05 04:52:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:41,380 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 04:52:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:41,381 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 04:52:41,381 INFO L226 Difference]: Without dead ends: 1249 [2021-06-05 04:52:41,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1078.6ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2021-06-05 04:52:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1020. [2021-06-05 04:52:41,391 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 04:52:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3540 transitions. [2021-06-05 04:52:41,393 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3540 transitions. Word has length 22 [2021-06-05 04:52:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:41,393 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3540 transitions. [2021-06-05 04:52:41,393 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 04:52:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3540 transitions. [2021-06-05 04:52:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:41,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:41,394 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 04:52:41,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10252,792 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:41,594 INFO L430 AbstractCegarLoop]: === Iteration 793 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:41,595 INFO L82 PathProgramCache]: Analyzing trace with hash 542769874, now seen corresponding path program 764 times [2021-06-05 04:52:41,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:41,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567641065] [2021-06-05 04:52:41,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:41,739 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 04:52:41,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:41,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567641065] [2021-06-05 04:52:41,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567641065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:41,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841147863] [2021-06-05 04:52:41,739 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 04:52:41,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:41,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:41,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:41,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:42,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:42,163 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 8 treesize of output 1 [2021-06-05 04:52:42,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:42,192 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:52:42,192 INFO L518 ElimStorePlain]: Eliminatee v_prenex_952 vanished before elimination [2021-06-05 04:52:42,193 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 04:52:42,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:52:42,266 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 04:52:42,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841147863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:42,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:42,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:42,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233841815] [2021-06-05 04:52:42,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:42,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:42,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:42,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:42,267 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 04:52:42,747 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 83 [2021-06-05 04:52:42,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:42,932 INFO L93 Difference]: Finished difference Result 1375 states and 4464 transitions. [2021-06-05 04:52:42,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:42,932 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 04:52:42,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:42,934 INFO L225 Difference]: With dead ends: 1375 [2021-06-05 04:52:42,934 INFO L226 Difference]: Without dead ends: 1375 [2021-06-05 04:52:42,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 678.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:42,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-06-05 04:52:42,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1028. [2021-06-05 04:52:42,945 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 04:52:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3576 transitions. [2021-06-05 04:52:42,947 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3576 transitions. Word has length 22 [2021-06-05 04:52:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:42,947 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 3576 transitions. [2021-06-05 04:52:42,947 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 04:52:42,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3576 transitions. [2021-06-05 04:52:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:42,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:42,948 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 04:52:43,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 793 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10270 [2021-06-05 04:52:43,149 INFO L430 AbstractCegarLoop]: === Iteration 794 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:43,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:43,149 INFO L82 PathProgramCache]: Analyzing trace with hash -951137848, now seen corresponding path program 765 times [2021-06-05 04:52:43,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:43,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670522099] [2021-06-05 04:52:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:43,308 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 04:52:43,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:43,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670522099] [2021-06-05 04:52:43,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670522099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:43,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149157405] [2021-06-05 04:52:43,308 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 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 04:52:43,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:52:43,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:43,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:52:43,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:43,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:43,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:43,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:43,787 INFO L628 ElimStorePlain]: treesize reduction 59, result has 37.9 percent of original size [2021-06-05 04:52:43,787 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:52:43,788 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 04:52:43,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:124, output treesize:36 [2021-06-05 04:52:43,867 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 04:52:43,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149157405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:43,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:43,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:43,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720064481] [2021-06-05 04:52:43,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:43,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:43,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:43,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:43,868 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 04:52:44,355 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2021-06-05 04:52:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:44,660 INFO L93 Difference]: Finished difference Result 1408 states and 4527 transitions. [2021-06-05 04:52:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:52:44,660 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 04:52:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:44,662 INFO L225 Difference]: With dead ends: 1408 [2021-06-05 04:52:44,662 INFO L226 Difference]: Without dead ends: 1381 [2021-06-05 04:52:44,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 775.4ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:52:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-06-05 04:52:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1025. [2021-06-05 04:52:44,673 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 04:52:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3565 transitions. [2021-06-05 04:52:44,675 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3565 transitions. Word has length 22 [2021-06-05 04:52:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:44,675 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 3565 transitions. [2021-06-05 04:52:44,675 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 04:52:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3565 transitions. [2021-06-05 04:52:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:44,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:44,676 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 04:52:44,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10293,794 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:44,876 INFO L430 AbstractCegarLoop]: === Iteration 795 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:44,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1294170312, now seen corresponding path program 766 times [2021-06-05 04:52:44,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:44,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792206681] [2021-06-05 04:52:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:45,032 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 04:52:45,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:45,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792206681] [2021-06-05 04:52:45,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792206681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:45,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817638410] [2021-06-05 04:52:45,032 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 04:52:45,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:45,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:45,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:45,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:45,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:45,441 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 8 treesize of output 1 [2021-06-05 04:52:45,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:45,470 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:52:45,470 INFO L518 ElimStorePlain]: Eliminatee v_prenex_964 vanished before elimination [2021-06-05 04:52:45,471 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 04:52:45,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:52:45,545 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 04:52:45,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817638410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:45,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:45,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:45,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836510065] [2021-06-05 04:52:45,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:45,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:45,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:45,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:45,546 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 04:52:46,012 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 104 [2021-06-05 04:52:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:46,215 INFO L93 Difference]: Finished difference Result 1373 states and 4461 transitions. [2021-06-05 04:52:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:52:46,216 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 04:52:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:46,217 INFO L225 Difference]: With dead ends: 1373 [2021-06-05 04:52:46,217 INFO L226 Difference]: Without dead ends: 1373 [2021-06-05 04:52:46,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 693.4ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:46,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-06-05 04:52:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1021. [2021-06-05 04:52:46,228 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 04:52:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3545 transitions. [2021-06-05 04:52:46,230 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3545 transitions. Word has length 22 [2021-06-05 04:52:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:46,230 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 3545 transitions. [2021-06-05 04:52:46,230 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 04:52:46,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3545 transitions. [2021-06-05 04:52:46,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:46,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:46,231 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 04:52:46,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 795 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10313 [2021-06-05 04:52:46,432 INFO L430 AbstractCegarLoop]: === Iteration 796 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:46,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:46,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1314906840, now seen corresponding path program 767 times [2021-06-05 04:52:46,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:46,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365101012] [2021-06-05 04:52:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:46,588 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 04:52:46,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:46,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365101012] [2021-06-05 04:52:46,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365101012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:46,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041860902] [2021-06-05 04:52:46,589 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 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 04:52:46,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:52:46,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:46,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:46,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:46,928 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 04:52:46,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041860902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:46,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:46,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 04:52:46,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566205229] [2021-06-05 04:52:46,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:52:46,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:46,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:52:46,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:52:46,929 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 04:52:47,294 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-06-05 04:52:47,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:47,456 INFO L93 Difference]: Finished difference Result 1353 states and 4428 transitions. [2021-06-05 04:52:47,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:52:47,457 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 04:52:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:47,458 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 04:52:47,458 INFO L226 Difference]: Without dead ends: 1347 [2021-06-05 04:52:47,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 557.7ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:52:47,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-06-05 04:52:47,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1020. [2021-06-05 04:52:47,469 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 04:52:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3540 transitions. [2021-06-05 04:52:47,471 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3540 transitions. Word has length 22 [2021-06-05 04:52:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:47,471 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3540 transitions. [2021-06-05 04:52:47,471 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 04:52:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3540 transitions. [2021-06-05 04:52:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:47,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:47,472 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 04:52:47,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10329,796 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:47,673 INFO L430 AbstractCegarLoop]: === Iteration 797 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash -703950776, now seen corresponding path program 768 times [2021-06-05 04:52:47,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:47,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951487492] [2021-06-05 04:52:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:47,841 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 04:52:47,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951487492] [2021-06-05 04:52:47,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951487492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405537690] [2021-06-05 04:52:47,841 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 04:52:47,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:52:47,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:47,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:47,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:48,312 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 04:52:48,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405537690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:48,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:48,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:48,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104738718] [2021-06-05 04:52:48,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:48,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:48,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:48,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:48,313 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 04:52:48,836 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-05 04:52:49,106 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2021-06-05 04:52:49,307 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 51 [2021-06-05 04:52:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:49,332 INFO L93 Difference]: Finished difference Result 1252 states and 4164 transitions. [2021-06-05 04:52:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:49,332 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 04:52:49,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:49,334 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 04:52:49,334 INFO L226 Difference]: Without dead ends: 1240 [2021-06-05 04:52:49,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1037.2ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-05 04:52:49,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1022. [2021-06-05 04:52:49,344 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 04:52:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3545 transitions. [2021-06-05 04:52:49,345 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3545 transitions. Word has length 22 [2021-06-05 04:52:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:49,345 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3545 transitions. [2021-06-05 04:52:49,346 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 04:52:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3545 transitions. [2021-06-05 04:52:49,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:49,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:49,347 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 04:52:49,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 797 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10342 [2021-06-05 04:52:49,547 INFO L430 AbstractCegarLoop]: === Iteration 798 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:49,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:49,547 INFO L82 PathProgramCache]: Analyzing trace with hash 47449662, now seen corresponding path program 769 times [2021-06-05 04:52:49,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:49,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846980371] [2021-06-05 04:52:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:49,708 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 04:52:49,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:49,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846980371] [2021-06-05 04:52:49,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846980371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:49,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089896269] [2021-06-05 04:52:49,708 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 04:52:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:49,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:49,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:50,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:52:50,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:52:50,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:52:50,214 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 04:52:50,214 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:52:50,214 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 04:52:50,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 04:52:50,258 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 04:52:50,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089896269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:50,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:50,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:50,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363145591] [2021-06-05 04:52:50,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:50,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:50,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:50,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:50,258 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 04:52:50,746 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 98 [2021-06-05 04:52:50,956 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2021-06-05 04:52:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:51,068 INFO L93 Difference]: Finished difference Result 1254 states and 4171 transitions. [2021-06-05 04:52:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:52:51,068 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 04:52:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:51,070 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 04:52:51,070 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 04:52:51,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 864.6ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:52:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 04:52:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1020. [2021-06-05 04:52:51,080 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 04:52:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 3540 transitions. [2021-06-05 04:52:51,082 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 3540 transitions. Word has length 22 [2021-06-05 04:52:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:51,082 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 3540 transitions. [2021-06-05 04:52:51,082 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 04:52:51,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 3540 transitions. [2021-06-05 04:52:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:51,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:51,083 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 04:52:51,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 798 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10363 [2021-06-05 04:52:51,283 INFO L430 AbstractCegarLoop]: === Iteration 799 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:51,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:51,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2085868842, now seen corresponding path program 770 times [2021-06-05 04:52:51,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:51,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617019366] [2021-06-05 04:52:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:51,403 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 04:52:51,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617019366] [2021-06-05 04:52:51,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617019366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490784835] [2021-06-05 04:52:51,403 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 04:52:51,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:52:51,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:51,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:51,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:51,799 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 04:52:52,009 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 04:52:52,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490784835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:52,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:52,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:52,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805594745] [2021-06-05 04:52:52,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:52,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:52,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:52,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:52,010 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 04:52:52,410 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2021-06-05 04:52:52,587 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 73 [2021-06-05 04:52:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:52,766 INFO L93 Difference]: Finished difference Result 1275 states and 4220 transitions. [2021-06-05 04:52:52,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:52,766 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 04:52:52,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:52,768 INFO L225 Difference]: With dead ends: 1275 [2021-06-05 04:52:52,768 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 04:52:52,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 844.9ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 04:52:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1030. [2021-06-05 04:52:52,778 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 04:52:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3578 transitions. [2021-06-05 04:52:52,780 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3578 transitions. Word has length 22 [2021-06-05 04:52:52,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:52,780 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 3578 transitions. [2021-06-05 04:52:52,780 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 04:52:52,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3578 transitions. [2021-06-05 04:52:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:52,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:52,781 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 04:52:52,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 799 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10388 [2021-06-05 04:52:52,981 INFO L430 AbstractCegarLoop]: === Iteration 800 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:52,982 INFO L82 PathProgramCache]: Analyzing trace with hash 715190732, now seen corresponding path program 771 times [2021-06-05 04:52:52,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:52,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362839391] [2021-06-05 04:52:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:53,098 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 04:52:53,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:53,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362839391] [2021-06-05 04:52:53,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362839391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:53,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105846010] [2021-06-05 04:52:53,098 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 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 04:52:53,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:52:53,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:53,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:53,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:53,626 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 04:52:53,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105846010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:53,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:53,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:53,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945763452] [2021-06-05 04:52:53,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:53,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:53,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:53,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:53,627 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 04:52:54,012 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-06-05 04:52:54,190 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-06-05 04:52:54,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:54,368 INFO L93 Difference]: Finished difference Result 1281 states and 4227 transitions. [2021-06-05 04:52:54,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:54,368 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 04:52:54,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:54,369 INFO L225 Difference]: With dead ends: 1281 [2021-06-05 04:52:54,370 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 04:52:54,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 795.6ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:54,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 04:52:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1027. [2021-06-05 04:52:54,380 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 04:52:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3567 transitions. [2021-06-05 04:52:54,382 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3567 transitions. Word has length 22 [2021-06-05 04:52:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:54,382 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3567 transitions. [2021-06-05 04:52:54,382 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 04:52:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3567 transitions. [2021-06-05 04:52:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:54,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:54,383 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 04:52:54,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10403,800 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:54,583 INFO L430 AbstractCegarLoop]: === Iteration 801 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:54,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:54,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1253046310, now seen corresponding path program 772 times [2021-06-05 04:52:54,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:54,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543318799] [2021-06-05 04:52:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:54,713 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 04:52:54,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:54,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543318799] [2021-06-05 04:52:54,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543318799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:54,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146691202] [2021-06-05 04:52:54,714 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 04:52:54,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:52:54,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:54,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:54,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:55,249 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 04:52:55,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146691202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:55,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:55,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:55,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460968771] [2021-06-05 04:52:55,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:55,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:55,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:55,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:55,250 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 04:52:55,639 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2021-06-05 04:52:55,812 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 80 [2021-06-05 04:52:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:56,020 INFO L93 Difference]: Finished difference Result 1245 states and 4145 transitions. [2021-06-05 04:52:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:56,021 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 04:52:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:56,022 INFO L225 Difference]: With dead ends: 1245 [2021-06-05 04:52:56,022 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 04:52:56,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 846.4ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:56,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 04:52:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1024. [2021-06-05 04:52:56,033 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 04:52:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3556 transitions. [2021-06-05 04:52:56,034 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3556 transitions. Word has length 22 [2021-06-05 04:52:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:56,034 INFO L482 AbstractCegarLoop]: Abstraction has 1024 states and 3556 transitions. [2021-06-05 04:52:56,034 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 04:52:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3556 transitions. [2021-06-05 04:52:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:56,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:56,036 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 04:52:56,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10427,801 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:56,236 INFO L430 AbstractCegarLoop]: === Iteration 802 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:56,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:56,236 INFO L82 PathProgramCache]: Analyzing trace with hash 746700044, now seen corresponding path program 773 times [2021-06-05 04:52:56,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:56,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27748162] [2021-06-05 04:52:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:56,350 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 04:52:56,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:56,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27748162] [2021-06-05 04:52:56,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27748162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:56,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338728482] [2021-06-05 04:52:56,351 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 04:52:56,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:52:56,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:56,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:56,726 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 04:52:56,916 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 04:52:56,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338728482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:56,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:56,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:56,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157069212] [2021-06-05 04:52:56,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:56,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:56,917 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 04:52:57,308 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 04:52:57,486 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2021-06-05 04:52:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:57,714 INFO L93 Difference]: Finished difference Result 1242 states and 4134 transitions. [2021-06-05 04:52:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:57,715 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 04:52:57,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:57,716 INFO L225 Difference]: With dead ends: 1242 [2021-06-05 04:52:57,716 INFO L226 Difference]: Without dead ends: 1224 [2021-06-05 04:52:57,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 883.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:52:57,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-06-05 04:52:57,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1021. [2021-06-05 04:52:57,726 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 04:52:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 3545 transitions. [2021-06-05 04:52:57,727 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 3545 transitions. Word has length 22 [2021-06-05 04:52:57,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:57,728 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 3545 transitions. [2021-06-05 04:52:57,728 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 04:52:57,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 3545 transitions. [2021-06-05 04:52:57,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:57,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:57,729 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 04:52:57,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10450,802 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:52:57,929 INFO L430 AbstractCegarLoop]: === Iteration 803 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:57,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1544553652, now seen corresponding path program 774 times [2021-06-05 04:52:57,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:57,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782712803] [2021-06-05 04:52:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:58,073 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 04:52:58,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:58,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782712803] [2021-06-05 04:52:58,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782712803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:58,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786093358] [2021-06-05 04:52:58,073 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 04:52:58,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:52:58,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:52:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:52:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:52:58,456 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 04:52:58,696 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 04:52:58,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786093358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:58,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:52:58,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:52:58,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664248941] [2021-06-05 04:52:58,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:52:58,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:52:58,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:52:58,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:52:58,697 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 04:52:59,081 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-05 04:52:59,434 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2021-06-05 04:52:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:52:59,533 INFO L93 Difference]: Finished difference Result 1284 states and 4242 transitions. [2021-06-05 04:52:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:52:59,533 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 04:52:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:52:59,535 INFO L225 Difference]: With dead ends: 1284 [2021-06-05 04:52:59,535 INFO L226 Difference]: Without dead ends: 1284 [2021-06-05 04:52:59,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 941.9ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:52:59,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-05 04:52:59,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1028. [2021-06-05 04:52:59,545 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 04:52:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3572 transitions. [2021-06-05 04:52:59,547 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3572 transitions. Word has length 22 [2021-06-05 04:52:59,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:52:59,547 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 3572 transitions. [2021-06-05 04:52:59,547 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 04:52:59,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3572 transitions. [2021-06-05 04:52:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:52:59,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:52:59,548 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 04:52:59,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 803 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10474 [2021-06-05 04:52:59,749 INFO L430 AbstractCegarLoop]: === Iteration 804 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:52:59,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:52:59,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1256505922, now seen corresponding path program 775 times [2021-06-05 04:52:59,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:52:59,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431119742] [2021-06-05 04:52:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:52:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:52:59,890 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 04:52:59,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:52:59,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431119742] [2021-06-05 04:52:59,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431119742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:52:59,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151787990] [2021-06-05 04:52:59,890 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 04:53:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:00,263 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 04:53:00,500 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 04:53:00,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151787990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:00,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:00,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:53:00,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461613077] [2021-06-05 04:53:00,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:53:00,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:00,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:53:00,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:53:00,501 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 04:53:00,899 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-06-05 04:53:01,241 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 64 [2021-06-05 04:53:01,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:01,344 INFO L93 Difference]: Finished difference Result 1290 states and 4249 transitions. [2021-06-05 04:53:01,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:01,344 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 04:53:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:01,346 INFO L225 Difference]: With dead ends: 1290 [2021-06-05 04:53:01,346 INFO L226 Difference]: Without dead ends: 1284 [2021-06-05 04:53:01,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 939.5ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-05 04:53:01,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1025. [2021-06-05 04:53:01,357 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 04:53:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3561 transitions. [2021-06-05 04:53:01,358 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3561 transitions. Word has length 22 [2021-06-05 04:53:01,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:01,358 INFO L482 AbstractCegarLoop]: Abstraction has 1025 states and 3561 transitions. [2021-06-05 04:53:01,359 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 04:53:01,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3561 transitions. [2021-06-05 04:53:01,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:01,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:01,360 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 04:53:01,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10494,804 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:01,560 INFO L430 AbstractCegarLoop]: === Iteration 805 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:01,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1794361500, now seen corresponding path program 776 times [2021-06-05 04:53:01,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:01,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550931515] [2021-06-05 04:53:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:01,713 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 04:53:01,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550931515] [2021-06-05 04:53:01,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550931515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580410] [2021-06-05 04:53:01,713 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 04:53:01,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:01,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:01,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:02,300 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 04:53:02,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:02,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:02,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:53:02,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173197673] [2021-06-05 04:53:02,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:53:02,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:02,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:53:02,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:53:02,300 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 04:53:02,690 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2021-06-05 04:53:03,048 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2021-06-05 04:53:03,215 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 46 [2021-06-05 04:53:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:03,243 INFO L93 Difference]: Finished difference Result 1254 states and 4167 transitions. [2021-06-05 04:53:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:03,243 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 04:53:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:03,245 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 04:53:03,245 INFO L226 Difference]: Without dead ends: 1242 [2021-06-05 04:53:03,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1057.3ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-06-05 04:53:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1022. [2021-06-05 04:53:03,255 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 04:53:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3550 transitions. [2021-06-05 04:53:03,256 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3550 transitions. Word has length 22 [2021-06-05 04:53:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:03,256 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3550 transitions. [2021-06-05 04:53:03,257 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 04:53:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3550 transitions. [2021-06-05 04:53:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:03,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:03,258 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 04:53:03,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10518,805 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:03,458 INFO L430 AbstractCegarLoop]: === Iteration 806 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:03,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:03,458 INFO L82 PathProgramCache]: Analyzing trace with hash 274023446, now seen corresponding path program 777 times [2021-06-05 04:53:03,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:03,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430031758] [2021-06-05 04:53:03,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:03,590 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 04:53:03,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:03,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430031758] [2021-06-05 04:53:03,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430031758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:03,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463087039] [2021-06-05 04:53:03,590 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 04:53:03,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:53:03,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:03,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:53:03,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:04,220 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 04:53:04,226 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 5 treesize of output 3 [2021-06-05 04:53:04,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,353 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-05 04:53:04,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:04,359 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 13 treesize of output 9 [2021-06-05 04:53:04,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,483 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 04:53:04,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:04,488 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 12 treesize of output 8 [2021-06-05 04:53:04,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,620 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-05 04:53:04,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:04,625 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 12 treesize of output 8 [2021-06-05 04:53:04,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,746 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-05 04:53:04,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:04,752 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 13 treesize of output 9 [2021-06-05 04:53:04,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,869 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 04:53:04,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:04,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:04,875 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:04,990 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-05 04:53:04,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,000 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-05 04:53:05,000 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2021-06-05 04:53:05,002 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,117 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-05 04:53:05,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,127 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-06-05 04:53:05,130 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,239 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-05 04:53:05,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 04:53:05,251 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:05,357 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-05 04:53:05,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:05,361 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 04:53:05,361 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 19 variables, input treesize:331, output treesize:160 [2021-06-05 04:53:05,549 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 04:53:05,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463087039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:05,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:05,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:53:05,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57844501] [2021-06-05 04:53:05,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:53:05,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:05,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:53:05,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:05,549 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 04:53:05,924 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-06-05 04:53:06,130 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 101 [2021-06-05 04:53:06,385 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2021-06-05 04:53:06,588 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 103 [2021-06-05 04:53:06,874 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 102 [2021-06-05 04:53:07,113 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2021-06-05 04:53:07,385 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 102 [2021-06-05 04:53:07,656 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2021-06-05 04:53:07,832 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2021-06-05 04:53:08,025 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 99 [2021-06-05 04:53:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:08,055 INFO L93 Difference]: Finished difference Result 2126 states and 6556 transitions. [2021-06-05 04:53:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:53:08,055 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 04:53:08,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:08,058 INFO L225 Difference]: With dead ends: 2126 [2021-06-05 04:53:08,058 INFO L226 Difference]: Without dead ends: 2084 [2021-06-05 04:53:08,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2580.7ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:53:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-06-05 04:53:08,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1039. [2021-06-05 04:53:08,072 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 04:53:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3639 transitions. [2021-06-05 04:53:08,074 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3639 transitions. Word has length 22 [2021-06-05 04:53:08,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:08,074 INFO L482 AbstractCegarLoop]: Abstraction has 1039 states and 3639 transitions. [2021-06-05 04:53:08,074 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 04:53:08,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3639 transitions. [2021-06-05 04:53:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:08,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:08,075 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 04:53:08,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10536,806 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:08,276 INFO L430 AbstractCegarLoop]: === Iteration 807 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:08,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1219884276, now seen corresponding path program 778 times [2021-06-05 04:53:08,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:08,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442455105] [2021-06-05 04:53:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:08,407 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 04:53:08,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:08,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442455105] [2021-06-05 04:53:08,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442455105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:08,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017766836] [2021-06-05 04:53:08,407 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 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 04:53:08,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:08,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:08,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:08,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:08,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:08,860 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 8 treesize of output 1 [2021-06-05 04:53:08,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:08,889 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:53:08,890 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:53:08,890 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 04:53:08,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:53:08,961 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 04:53:08,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017766836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:08,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:08,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:53:08,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509697094] [2021-06-05 04:53:08,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:53:08,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:08,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:53:08,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:53:08,961 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 04:53:09,341 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2021-06-05 04:53:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:09,681 INFO L93 Difference]: Finished difference Result 1387 states and 4523 transitions. [2021-06-05 04:53:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:09,681 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 04:53:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:09,683 INFO L225 Difference]: With dead ends: 1387 [2021-06-05 04:53:09,683 INFO L226 Difference]: Without dead ends: 1381 [2021-06-05 04:53:09,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 748.3ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-06-05 04:53:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1040. [2021-06-05 04:53:09,694 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 04:53:09,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3648 transitions. [2021-06-05 04:53:09,696 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3648 transitions. Word has length 22 [2021-06-05 04:53:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:09,696 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 3648 transitions. [2021-06-05 04:53:09,696 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 04:53:09,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3648 transitions. [2021-06-05 04:53:09,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:09,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:09,697 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 04:53:09,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 807 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10557 [2021-06-05 04:53:09,897 INFO L430 AbstractCegarLoop]: === Iteration 808 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:09,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:09,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1025423884, now seen corresponding path program 779 times [2021-06-05 04:53:09,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:09,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997321376] [2021-06-05 04:53:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:10,033 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 04:53:10,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:10,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997321376] [2021-06-05 04:53:10,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997321376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:10,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533753541] [2021-06-05 04:53:10,034 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 04:53:10,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:10,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:10,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:10,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:10,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:10,520 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 8 treesize of output 1 [2021-06-05 04:53:10,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:10,551 INFO L628 ElimStorePlain]: treesize reduction 47, result has 36.5 percent of original size [2021-06-05 04:53:10,551 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1027 vanished before elimination [2021-06-05 04:53:10,551 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 04:53:10,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:53:10,626 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 04:53:10,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533753541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:10,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:10,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:53:10,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850057013] [2021-06-05 04:53:10,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:53:10,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:10,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:53:10,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:53:10,627 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 04:53:11,000 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-06-05 04:53:11,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:11,365 INFO L93 Difference]: Finished difference Result 1373 states and 4500 transitions. [2021-06-05 04:53:11,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:53:11,366 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 04:53:11,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:11,367 INFO L225 Difference]: With dead ends: 1373 [2021-06-05 04:53:11,367 INFO L226 Difference]: Without dead ends: 1373 [2021-06-05 04:53:11,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 754.7ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:11,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1373 states. [2021-06-05 04:53:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1373 to 1036. [2021-06-05 04:53:11,378 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 04:53:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3628 transitions. [2021-06-05 04:53:11,380 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3628 transitions. Word has length 22 [2021-06-05 04:53:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:11,380 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3628 transitions. [2021-06-05 04:53:11,380 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 04:53:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3628 transitions. [2021-06-05 04:53:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:11,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:11,381 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 04:53:11,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 808 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10575 [2021-06-05 04:53:11,582 INFO L430 AbstractCegarLoop]: === Iteration 809 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:11,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1046160412, now seen corresponding path program 780 times [2021-06-05 04:53:11,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:11,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807017314] [2021-06-05 04:53:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:11,713 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 04:53:11,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:11,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807017314] [2021-06-05 04:53:11,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807017314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:11,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676441258] [2021-06-05 04:53:11,714 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 04:53:11,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:11,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:11,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:11,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:12,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:12,115 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 8 treesize of output 1 [2021-06-05 04:53:12,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:12,145 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:53:12,145 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:53:12,145 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 04:53:12,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:53:12,217 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 04:53:12,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676441258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:12,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:12,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:53:12,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400980865] [2021-06-05 04:53:12,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:53:12,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:12,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:53:12,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:53:12,217 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 04:53:12,583 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-06-05 04:53:12,736 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-06-05 04:53:12,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:12,949 INFO L93 Difference]: Finished difference Result 1353 states and 4467 transitions. [2021-06-05 04:53:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:53:12,949 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 04:53:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:12,951 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 04:53:12,951 INFO L226 Difference]: Without dead ends: 1347 [2021-06-05 04:53:12,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 740.8ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:53:12,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-06-05 04:53:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1035. [2021-06-05 04:53:12,962 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 04:53:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 3623 transitions. [2021-06-05 04:53:12,963 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 3623 transitions. Word has length 22 [2021-06-05 04:53:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:12,963 INFO L482 AbstractCegarLoop]: Abstraction has 1035 states and 3623 transitions. [2021-06-05 04:53:12,964 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 04:53:12,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 3623 transitions. [2021-06-05 04:53:12,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:12,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:12,965 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 04:53:13,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10606,809 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:13,165 INFO L430 AbstractCegarLoop]: === Iteration 810 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:13,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:13,165 INFO L82 PathProgramCache]: Analyzing trace with hash -972697204, now seen corresponding path program 781 times [2021-06-05 04:53:13,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:13,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644927917] [2021-06-05 04:53:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:13,323 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 04:53:13,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:13,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644927917] [2021-06-05 04:53:13,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644927917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:13,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002812653] [2021-06-05 04:53:13,324 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 04:53:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:13,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:13,882 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 04:53:13,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002812653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:13,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:13,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:53:13,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857943294] [2021-06-05 04:53:13,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:53:13,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:13,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:53:13,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:53:13,891 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 04:53:14,289 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 95 [2021-06-05 04:53:14,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:14,754 INFO L93 Difference]: Finished difference Result 1260 states and 4223 transitions. [2021-06-05 04:53:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:14,754 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 04:53:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:14,756 INFO L225 Difference]: With dead ends: 1260 [2021-06-05 04:53:14,756 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 04:53:14,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 967.3ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 04:53:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1037. [2021-06-05 04:53:14,766 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 04:53:14,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3628 transitions. [2021-06-05 04:53:14,768 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3628 transitions. Word has length 22 [2021-06-05 04:53:14,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:14,768 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3628 transitions. [2021-06-05 04:53:14,768 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 04:53:14,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3628 transitions. [2021-06-05 04:53:14,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:14,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:14,769 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 04:53:14,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10627,810 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:14,969 INFO L430 AbstractCegarLoop]: === Iteration 811 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:14,969 INFO L82 PathProgramCache]: Analyzing trace with hash -221296766, now seen corresponding path program 782 times [2021-06-05 04:53:14,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:14,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566514523] [2021-06-05 04:53:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:15,119 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 04:53:15,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:15,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566514523] [2021-06-05 04:53:15,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566514523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:15,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457857056] [2021-06-05 04:53:15,119 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 04:53:15,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:15,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:15,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:15,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:15,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:15,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:15,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:15,611 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 04:53:15,611 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:53:15,612 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 04:53:15,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 04:53:15,656 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 04:53:15,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457857056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:15,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:15,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:53:15,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378769756] [2021-06-05 04:53:15,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:53:15,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:15,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:53:15,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:53:15,657 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 04:53:16,036 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-05 04:53:16,388 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2021-06-05 04:53:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:16,495 INFO L93 Difference]: Finished difference Result 1262 states and 4230 transitions. [2021-06-05 04:53:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:53:16,495 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 04:53:16,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:16,497 INFO L225 Difference]: With dead ends: 1262 [2021-06-05 04:53:16,497 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 04:53:16,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 870.1ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:53:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 04:53:16,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1034. [2021-06-05 04:53:16,507 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 04:53:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3618 transitions. [2021-06-05 04:53:16,508 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3618 transitions. Word has length 22 [2021-06-05 04:53:16,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:16,509 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3618 transitions. [2021-06-05 04:53:16,509 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 04:53:16,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3618 transitions. [2021-06-05 04:53:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:16,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:16,510 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 04:53:16,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10646,811 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:16,710 INFO L430 AbstractCegarLoop]: === Iteration 812 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash 867226140, now seen corresponding path program 783 times [2021-06-05 04:53:16,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:16,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432419122] [2021-06-05 04:53:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:16,831 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 04:53:16,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:16,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432419122] [2021-06-05 04:53:16,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432419122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:16,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120144997] [2021-06-05 04:53:16,831 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 04:53:16,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:53:16,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:16,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:16,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:17,207 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-05 04:53:17,380 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 04:53:17,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120144997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:17,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:17,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:53:17,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432054879] [2021-06-05 04:53:17,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:53:17,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:17,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:53:17,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:53:17,381 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 04:53:17,767 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2021-06-05 04:53:17,970 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-06-05 04:53:18,138 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 60 [2021-06-05 04:53:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:18,202 INFO L93 Difference]: Finished difference Result 1246 states and 4183 transitions. [2021-06-05 04:53:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:18,202 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 04:53:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:18,204 INFO L225 Difference]: With dead ends: 1246 [2021-06-05 04:53:18,204 INFO L226 Difference]: Without dead ends: 1228 [2021-06-05 04:53:18,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 938.4ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-06-05 04:53:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1036. [2021-06-05 04:53:18,214 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 04:53:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3623 transitions. [2021-06-05 04:53:18,215 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3623 transitions. Word has length 22 [2021-06-05 04:53:18,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:18,215 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3623 transitions. [2021-06-05 04:53:18,215 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 04:53:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3623 transitions. [2021-06-05 04:53:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:18,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:18,217 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 04:53:18,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 812 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10676 [2021-06-05 04:53:18,417 INFO L430 AbstractCegarLoop]: === Iteration 813 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:18,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1609164058, now seen corresponding path program 784 times [2021-06-05 04:53:18,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:18,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589327961] [2021-06-05 04:53:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:18,562 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 04:53:18,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:18,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589327961] [2021-06-05 04:53:18,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589327961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:18,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125398034] [2021-06-05 04:53:18,562 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 04:53:18,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:18,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:18,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:18,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:19,085 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 04:53:19,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125398034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:19,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:19,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:53:19,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376445530] [2021-06-05 04:53:19,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:53:19,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:19,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:53:19,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:53:19,086 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 04:53:19,494 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 86 [2021-06-05 04:53:19,700 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2021-06-05 04:53:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:19,893 INFO L93 Difference]: Finished difference Result 1242 states and 4175 transitions. [2021-06-05 04:53:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:19,894 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 04:53:19,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:19,895 INFO L225 Difference]: With dead ends: 1242 [2021-06-05 04:53:19,895 INFO L226 Difference]: Without dead ends: 1230 [2021-06-05 04:53:19,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 885.4ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:19,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-06-05 04:53:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1038. [2021-06-05 04:53:19,905 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 04:53:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3628 transitions. [2021-06-05 04:53:19,907 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3628 transitions. Word has length 22 [2021-06-05 04:53:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:19,907 INFO L482 AbstractCegarLoop]: Abstraction has 1038 states and 3628 transitions. [2021-06-05 04:53:19,907 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 04:53:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3628 transitions. [2021-06-05 04:53:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:19,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:19,908 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 04:53:20,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 813 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10688 [2021-06-05 04:53:20,109 INFO L430 AbstractCegarLoop]: === Iteration 814 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:20,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:20,109 INFO L82 PathProgramCache]: Analyzing trace with hash -857763620, now seen corresponding path program 785 times [2021-06-05 04:53:20,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:20,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404980327] [2021-06-05 04:53:20,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:20,235 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 04:53:20,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:20,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404980327] [2021-06-05 04:53:20,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404980327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:20,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473347855] [2021-06-05 04:53:20,236 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 04:53:20,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:20,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:20,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:20,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:20,611 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-06-05 04:53:20,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:20,777 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 8 treesize of output 1 [2021-06-05 04:53:20,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:20,792 INFO L628 ElimStorePlain]: treesize reduction 22, result has 35.3 percent of original size [2021-06-05 04:53:20,792 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:53:20,793 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 04:53:20,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:12 [2021-06-05 04:53:20,836 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 04:53:20,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473347855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:20,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:20,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-06-05 04:53:20,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244654013] [2021-06-05 04:53:20,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:53:20,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:20,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:53:20,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:53:20,837 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 04:53:21,230 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2021-06-05 04:53:21,429 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2021-06-05 04:53:21,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:21,613 INFO L93 Difference]: Finished difference Result 1244 states and 4182 transitions. [2021-06-05 04:53:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:53:21,613 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 04:53:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:21,615 INFO L225 Difference]: With dead ends: 1244 [2021-06-05 04:53:21,615 INFO L226 Difference]: Without dead ends: 1238 [2021-06-05 04:53:21,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 879.3ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:53:21,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-06-05 04:53:21,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1034. [2021-06-05 04:53:21,624 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 04:53:21,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3618 transitions. [2021-06-05 04:53:21,626 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3618 transitions. Word has length 22 [2021-06-05 04:53:21,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:21,626 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3618 transitions. [2021-06-05 04:53:21,626 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 04:53:21,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3618 transitions. [2021-06-05 04:53:21,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:21,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:21,627 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 04:53:21,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 814 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10707 [2021-06-05 04:53:21,828 INFO L430 AbstractCegarLoop]: === Iteration 815 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:21,828 INFO L82 PathProgramCache]: Analyzing trace with hash -789062727, now seen corresponding path program 786 times [2021-06-05 04:53:21,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:21,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989687148] [2021-06-05 04:53:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:21,911 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 04:53:21,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:21,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989687148] [2021-06-05 04:53:21,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989687148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:21,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496320437] [2021-06-05 04:53:21,912 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 04:53:22,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:22,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:22,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:22,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:22,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:22,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:22,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:22,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:22,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:22,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:22,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:22,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:22,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:22,150 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 12 treesize of output 8 [2021-06-05 04:53:22,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:22,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:22,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:22,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:22,185 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2021-06-05 04:53:22,186 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 04:53:22,186 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:15 [2021-06-05 04:53:22,226 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 04:53:22,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496320437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:22,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:22,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 04:53:22,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719930028] [2021-06-05 04:53:22,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:22,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:22,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:22,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:22,226 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 04:53:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:22,558 INFO L93 Difference]: Finished difference Result 1400 states and 4652 transitions. [2021-06-05 04:53:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:53:22,558 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 04:53:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:22,560 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 04:53:22,560 INFO L226 Difference]: Without dead ends: 1330 [2021-06-05 04:53:22,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:22,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-06-05 04:53:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1034. [2021-06-05 04:53:22,571 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 04:53:22,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3618 transitions. [2021-06-05 04:53:22,573 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3618 transitions. Word has length 22 [2021-06-05 04:53:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:22,573 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3618 transitions. [2021-06-05 04:53:22,573 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 04:53:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3618 transitions. [2021-06-05 04:53:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:22,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:22,575 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 04:53:22,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10739,815 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:22,775 INFO L430 AbstractCegarLoop]: === Iteration 816 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:22,775 INFO L82 PathProgramCache]: Analyzing trace with hash 436796254, now seen corresponding path program 787 times [2021-06-05 04:53:22,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:22,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262798704] [2021-06-05 04:53:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:22,912 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 04:53:22,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:22,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262798704] [2021-06-05 04:53:22,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262798704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:22,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566941787] [2021-06-05 04:53:22,912 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 04:53:23,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:23,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:23,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:23,272 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1057, nondet_0], 1=[v_prenex_1061, v_prenex_1059]} [2021-06-05 04:53:23,276 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 5 treesize of output 3 [2021-06-05 04:53:23,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:23,342 INFO L628 ElimStorePlain]: treesize reduction 61, result has 49.6 percent of original size [2021-06-05 04:53:23,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:23,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:23,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:23,367 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1061 vanished before elimination [2021-06-05 04:53:23,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:23,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:23,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:23,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:23,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:23,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:23,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:23,393 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 04:53:23,393 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:126, output treesize:6 [2021-06-05 04:53:23,446 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 04:53:23,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566941787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:23,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:23,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:23,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198844461] [2021-06-05 04:53:23,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:23,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:23,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:23,447 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 04:53:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:23,822 INFO L93 Difference]: Finished difference Result 1351 states and 4478 transitions. [2021-06-05 04:53:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:23,823 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 04:53:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:23,824 INFO L225 Difference]: With dead ends: 1351 [2021-06-05 04:53:23,824 INFO L226 Difference]: Without dead ends: 1351 [2021-06-05 04:53:23,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:23,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-06-05 04:53:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1044. [2021-06-05 04:53:23,835 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 04:53:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3644 transitions. [2021-06-05 04:53:23,837 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3644 transitions. Word has length 22 [2021-06-05 04:53:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:23,837 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3644 transitions. [2021-06-05 04:53:23,837 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 04:53:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3644 transitions. [2021-06-05 04:53:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:23,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:23,838 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 04:53:24,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 816 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10756 [2021-06-05 04:53:24,039 INFO L430 AbstractCegarLoop]: === Iteration 817 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:24,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:24,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1595439784, now seen corresponding path program 788 times [2021-06-05 04:53:24,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:24,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137074908] [2021-06-05 04:53:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:24,162 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 04:53:24,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:24,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137074908] [2021-06-05 04:53:24,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137074908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:24,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091329052] [2021-06-05 04:53:24,162 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 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 04:53:24,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:24,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:24,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:24,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:24,462 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1064, nondet_0], 3=[v_prenex_1067]} [2021-06-05 04:53:24,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:24,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:24,501 INFO L628 ElimStorePlain]: treesize reduction 35, result has 58.3 percent of original size [2021-06-05 04:53:24,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:24,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:24,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:24,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:24,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:24,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:24,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:24,539 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 04:53:24,539 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 8 variables, input treesize:89, output treesize:9 [2021-06-05 04:53:24,587 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 04:53:24,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091329052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:24,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:24,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:24,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423141585] [2021-06-05 04:53:24,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:24,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:24,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:24,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:24,587 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 04:53:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:24,980 INFO L93 Difference]: Finished difference Result 1403 states and 4599 transitions. [2021-06-05 04:53:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:24,980 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 04:53:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:24,982 INFO L225 Difference]: With dead ends: 1403 [2021-06-05 04:53:24,982 INFO L226 Difference]: Without dead ends: 1403 [2021-06-05 04:53:24,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-05 04:53:24,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1047. [2021-06-05 04:53:24,993 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 04:53:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3655 transitions. [2021-06-05 04:53:24,995 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3655 transitions. Word has length 22 [2021-06-05 04:53:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:24,995 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3655 transitions. [2021-06-05 04:53:24,995 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 04:53:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3655 transitions. [2021-06-05 04:53:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:24,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:24,996 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 04:53:25,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10781,817 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:25,197 INFO L430 AbstractCegarLoop]: === Iteration 818 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:25,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:25,197 INFO L82 PathProgramCache]: Analyzing trace with hash 101532062, now seen corresponding path program 789 times [2021-06-05 04:53:25,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:25,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789223480] [2021-06-05 04:53:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:25,318 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 04:53:25,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:25,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789223480] [2021-06-05 04:53:25,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789223480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:25,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720987533] [2021-06-05 04:53:25,319 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 04:53:25,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:53:25,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:25,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:25,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:25,651 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1069, nondet_0], 1=[v_prenex_1071, v_prenex_1074]} [2021-06-05 04:53:25,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:25,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:25,707 INFO L628 ElimStorePlain]: treesize reduction 61, result has 49.6 percent of original size [2021-06-05 04:53:25,710 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 6 treesize of output 4 [2021-06-05 04:53:25,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:25,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:25,731 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1071 vanished before elimination [2021-06-05 04:53:25,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:25,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:25,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:25,735 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:25,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:25,738 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:25,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:25,757 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 04:53:25,757 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:126, output treesize:6 [2021-06-05 04:53:25,803 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 04:53:25,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720987533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:25,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:25,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:25,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580592381] [2021-06-05 04:53:25,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:25,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:25,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:25,803 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 04:53:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:26,164 INFO L93 Difference]: Finished difference Result 1360 states and 4496 transitions. [2021-06-05 04:53:26,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:26,165 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 04:53:26,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:26,166 INFO L225 Difference]: With dead ends: 1360 [2021-06-05 04:53:26,166 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 04:53:26,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:26,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 04:53:26,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1039. [2021-06-05 04:53:26,177 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 04:53:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3631 transitions. [2021-06-05 04:53:26,179 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3631 transitions. Word has length 22 [2021-06-05 04:53:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:26,179 INFO L482 AbstractCegarLoop]: Abstraction has 1039 states and 3631 transitions. [2021-06-05 04:53:26,179 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 04:53:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3631 transitions. [2021-06-05 04:53:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:26,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:26,180 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 04:53:26,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 818 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10796 [2021-06-05 04:53:26,380 INFO L430 AbstractCegarLoop]: === Iteration 819 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:26,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1605435924, now seen corresponding path program 790 times [2021-06-05 04:53:26,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:26,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815415648] [2021-06-05 04:53:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:26,521 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 04:53:26,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:26,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815415648] [2021-06-05 04:53:26,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815415648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:26,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493450397] [2021-06-05 04:53:26,522 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 04:53:26,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:26,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:26,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:26,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:26,942 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 04:53:26,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493450397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:26,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:26,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:26,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711018139] [2021-06-05 04:53:26,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:26,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:26,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:26,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:26,942 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 04:53:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:27,419 INFO L93 Difference]: Finished difference Result 1303 states and 4331 transitions. [2021-06-05 04:53:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:27,419 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 04:53:27,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:27,421 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 04:53:27,421 INFO L226 Difference]: Without dead ends: 1303 [2021-06-05 04:53:27,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 530.3ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:27,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-05 04:53:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1045. [2021-06-05 04:53:27,431 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 04:53:27,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3653 transitions. [2021-06-05 04:53:27,433 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3653 transitions. Word has length 22 [2021-06-05 04:53:27,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:27,433 INFO L482 AbstractCegarLoop]: Abstraction has 1045 states and 3653 transitions. [2021-06-05 04:53:27,433 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 04:53:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3653 transitions. [2021-06-05 04:53:27,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:27,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:27,434 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 04:53:27,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 819 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10821 [2021-06-05 04:53:27,635 INFO L430 AbstractCegarLoop]: === Iteration 820 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:27,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1195623650, now seen corresponding path program 791 times [2021-06-05 04:53:27,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:27,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741075104] [2021-06-05 04:53:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:27,775 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 04:53:27,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:27,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741075104] [2021-06-05 04:53:27,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741075104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:27,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061329116] [2021-06-05 04:53:27,776 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 04:53:27,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:27,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:27,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:28,182 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 04:53:28,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061329116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:28,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:28,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:28,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936145681] [2021-06-05 04:53:28,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:28,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:28,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:28,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:28,183 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 04:53:28,614 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-06-05 04:53:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:28,691 INFO L93 Difference]: Finished difference Result 1309 states and 4338 transitions. [2021-06-05 04:53:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:28,691 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 04:53:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:28,693 INFO L225 Difference]: With dead ends: 1309 [2021-06-05 04:53:28,693 INFO L226 Difference]: Without dead ends: 1303 [2021-06-05 04:53:28,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 535.7ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:28,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-05 04:53:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1042. [2021-06-05 04:53:28,703 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 04:53:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3642 transitions. [2021-06-05 04:53:28,705 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3642 transitions. Word has length 22 [2021-06-05 04:53:28,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:28,705 INFO L482 AbstractCegarLoop]: Abstraction has 1042 states and 3642 transitions. [2021-06-05 04:53:28,705 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 04:53:28,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3642 transitions. [2021-06-05 04:53:28,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:28,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:28,706 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 04:53:28,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10838,820 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:28,906 INFO L430 AbstractCegarLoop]: === Iteration 821 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:28,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:28,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1733479228, now seen corresponding path program 792 times [2021-06-05 04:53:28,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:28,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838204273] [2021-06-05 04:53:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:29,051 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 04:53:29,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:29,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838204273] [2021-06-05 04:53:29,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838204273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:29,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975187175] [2021-06-05 04:53:29,052 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 04:53:29,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:53:29,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:29,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:29,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:29,495 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 04:53:29,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975187175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:29,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:29,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:29,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947535416] [2021-06-05 04:53:29,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:29,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:29,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:29,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:29,496 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 04:53:30,016 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-05 04:53:30,197 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2021-06-05 04:53:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:30,222 INFO L93 Difference]: Finished difference Result 1267 states and 4243 transitions. [2021-06-05 04:53:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:30,222 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 04:53:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:30,224 INFO L225 Difference]: With dead ends: 1267 [2021-06-05 04:53:30,224 INFO L226 Difference]: Without dead ends: 1255 [2021-06-05 04:53:30,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 763.8ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-06-05 04:53:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1034. [2021-06-05 04:53:30,234 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 04:53:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3618 transitions. [2021-06-05 04:53:30,235 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3618 transitions. Word has length 22 [2021-06-05 04:53:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:30,235 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3618 transitions. [2021-06-05 04:53:30,236 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 04:53:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3618 transitions. [2021-06-05 04:53:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:30,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:30,237 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 04:53:30,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 821 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10852 [2021-06-05 04:53:30,437 INFO L430 AbstractCegarLoop]: === Iteration 822 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:30,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:30,437 INFO L82 PathProgramCache]: Analyzing trace with hash -31263719, now seen corresponding path program 793 times [2021-06-05 04:53:30,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:30,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206513363] [2021-06-05 04:53:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:30,520 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 04:53:30,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:30,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206513363] [2021-06-05 04:53:30,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206513363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:30,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042020403] [2021-06-05 04:53:30,520 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 04:53:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:30,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:30,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:30,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:30,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:30,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,786 INFO L628 ElimStorePlain]: treesize reduction 2, result has 97.4 percent of original size [2021-06-05 04:53:30,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:30,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:30,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:30,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:30,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:30,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:30,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:30,854 INFO L628 ElimStorePlain]: treesize reduction 14, result has 72.5 percent of original size [2021-06-05 04:53:30,855 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 04:53:30,855 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:105, output treesize:21 [2021-06-05 04:53:30,924 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 04:53:30,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042020403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:30,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:30,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 04:53:30,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089139452] [2021-06-05 04:53:30,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:30,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:30,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:30,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:30,924 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 04:53:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:31,331 INFO L93 Difference]: Finished difference Result 1611 states and 5227 transitions. [2021-06-05 04:53:31,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:53:31,331 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 04:53:31,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:31,333 INFO L225 Difference]: With dead ends: 1611 [2021-06-05 04:53:31,333 INFO L226 Difference]: Without dead ends: 1541 [2021-06-05 04:53:31,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2021-06-05 04:53:31,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1034. [2021-06-05 04:53:31,345 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 04:53:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3618 transitions. [2021-06-05 04:53:31,346 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3618 transitions. Word has length 22 [2021-06-05 04:53:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:31,346 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3618 transitions. [2021-06-05 04:53:31,346 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 04:53:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3618 transitions. [2021-06-05 04:53:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:31,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:31,347 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 04:53:31,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10878,822 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:31,548 INFO L430 AbstractCegarLoop]: === Iteration 823 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:31,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:31,548 INFO L82 PathProgramCache]: Analyzing trace with hash 978111444, now seen corresponding path program 794 times [2021-06-05 04:53:31,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:31,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905555402] [2021-06-05 04:53:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:31,660 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 04:53:31,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:31,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905555402] [2021-06-05 04:53:31,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905555402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:31,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062937832] [2021-06-05 04:53:31,660 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 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 04:53:31,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:31,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:31,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:31,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:32,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:32,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:32,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:32,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:32,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:32,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:32,099 INFO L628 ElimStorePlain]: treesize reduction 39, result has 72.9 percent of original size [2021-06-05 04:53:32,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:32,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:32,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:32,147 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 5 treesize of output 3 [2021-06-05 04:53:32,148 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:32,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:32,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:32,151 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:32,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:32,191 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 04:53:32,192 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 9 variables, input treesize:162, output treesize:29 [2021-06-05 04:53:32,266 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 04:53:32,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062937832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:32,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:32,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:32,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209784010] [2021-06-05 04:53:32,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:32,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:32,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:32,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:32,266 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 04:53:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:32,617 INFO L93 Difference]: Finished difference Result 1608 states and 5214 transitions. [2021-06-05 04:53:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:32,617 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 04:53:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:32,619 INFO L225 Difference]: With dead ends: 1608 [2021-06-05 04:53:32,619 INFO L226 Difference]: Without dead ends: 1608 [2021-06-05 04:53:32,619 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 04:53:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-06-05 04:53:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1046. [2021-06-05 04:53:32,632 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 04:53:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3659 transitions. [2021-06-05 04:53:32,633 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3659 transitions. Word has length 22 [2021-06-05 04:53:32,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:32,633 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 3659 transitions. [2021-06-05 04:53:32,633 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 04:53:32,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3659 transitions. [2021-06-05 04:53:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:32,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:32,635 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 04:53:32,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10896,823 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:32,835 INFO L430 AbstractCegarLoop]: === Iteration 824 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2136754974, now seen corresponding path program 795 times [2021-06-05 04:53:32,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:32,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699671998] [2021-06-05 04:53:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:32,970 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 04:53:32,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:32,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699671998] [2021-06-05 04:53:32,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699671998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:32,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659330258] [2021-06-05 04:53:32,971 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 04:53:33,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:53:33,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:33,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:53:33,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:33,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:33,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:33,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:33,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:33,253 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 6 treesize of output 4 [2021-06-05 04:53:33,254 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:33,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:33,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:33,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:33,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:33,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:33,314 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 5 treesize of output 3 [2021-06-05 04:53:33,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:33,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:33,362 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 6 treesize of output 4 [2021-06-05 04:53:33,363 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:33,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:33,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:33,366 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:33,424 INFO L628 ElimStorePlain]: treesize reduction 15, result has 80.0 percent of original size [2021-06-05 04:53:33,426 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 04:53:33,426 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:144, output treesize:22 [2021-06-05 04:53:33,514 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 04:53:33,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659330258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:33,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:33,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:53:33,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471125366] [2021-06-05 04:53:33,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:53:33,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:33,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:53:33,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:53:33,515 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 04:53:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:33,908 INFO L93 Difference]: Finished difference Result 1649 states and 5306 transitions. [2021-06-05 04:53:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:33,908 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 04:53:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:33,910 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 04:53:33,910 INFO L226 Difference]: Without dead ends: 1649 [2021-06-05 04:53:33,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:33,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-06-05 04:53:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1052. [2021-06-05 04:53:33,923 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 04:53:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3684 transitions. [2021-06-05 04:53:33,925 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3684 transitions. Word has length 22 [2021-06-05 04:53:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:33,925 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 3684 transitions. [2021-06-05 04:53:33,925 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 04:53:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3684 transitions. [2021-06-05 04:53:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:33,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:33,926 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 04:53:34,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10938,824 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:34,126 INFO L430 AbstractCegarLoop]: === Iteration 825 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:34,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:34,127 INFO L82 PathProgramCache]: Analyzing trace with hash 642847252, now seen corresponding path program 796 times [2021-06-05 04:53:34,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:34,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571125852] [2021-06-05 04:53:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:34,239 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 04:53:34,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:34,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571125852] [2021-06-05 04:53:34,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571125852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:34,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286155797] [2021-06-05 04:53:34,239 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 04:53:34,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:34,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:34,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:34,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:34,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:34,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:34,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:34,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,654 INFO L628 ElimStorePlain]: treesize reduction 54, result has 56.5 percent of original size [2021-06-05 04:53:34,654 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1100 vanished before elimination [2021-06-05 04:53:34,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:34,657 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 04:53:34,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:34,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:34,685 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 04:53:34,685 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 9 variables, input treesize:142, output treesize:27 [2021-06-05 04:53:34,762 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 04:53:34,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286155797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:34,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:34,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:34,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939333275] [2021-06-05 04:53:34,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:34,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:34,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:34,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:34,763 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 04:53:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:35,142 INFO L93 Difference]: Finished difference Result 1603 states and 5195 transitions. [2021-06-05 04:53:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:35,142 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 04:53:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:35,144 INFO L225 Difference]: With dead ends: 1603 [2021-06-05 04:53:35,144 INFO L226 Difference]: Without dead ends: 1597 [2021-06-05 04:53:35,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-06-05 04:53:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1044. [2021-06-05 04:53:35,156 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 04:53:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3660 transitions. [2021-06-05 04:53:35,158 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3660 transitions. Word has length 22 [2021-06-05 04:53:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:35,158 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3660 transitions. [2021-06-05 04:53:35,158 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 04:53:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3660 transitions. [2021-06-05 04:53:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:35,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:35,159 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 04:53:35,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 825 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10960 [2021-06-05 04:53:35,360 INFO L430 AbstractCegarLoop]: === Iteration 826 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:35,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:35,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1388623929, now seen corresponding path program 797 times [2021-06-05 04:53:35,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:35,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402903722] [2021-06-05 04:53:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:35,439 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 04:53:35,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:35,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402903722] [2021-06-05 04:53:35,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402903722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:35,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156971730] [2021-06-05 04:53:35,439 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 04:53:35,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:35,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:35,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:35,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:35,675 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 6 treesize of output 4 [2021-06-05 04:53:35,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:35,678 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:35,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:35,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:35,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:35,681 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 12 treesize of output 8 [2021-06-05 04:53:35,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:35,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:35,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:35,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:35,719 INFO L628 ElimStorePlain]: treesize reduction 43, result has 46.3 percent of original size [2021-06-05 04:53:35,720 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:53:35,720 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 04:53:35,720 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:124, output treesize:21 [2021-06-05 04:53:35,784 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 04:53:35,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156971730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:35,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:35,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 04:53:35,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370315832] [2021-06-05 04:53:35,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:53:35,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:35,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:53:35,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:53:35,784 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 04:53:36,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:36,374 INFO L93 Difference]: Finished difference Result 1731 states and 5513 transitions. [2021-06-05 04:53:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:53:36,374 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 04:53:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:36,377 INFO L225 Difference]: With dead ends: 1731 [2021-06-05 04:53:36,377 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 04:53:36,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:53:36,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 04:53:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1044. [2021-06-05 04:53:36,389 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 04:53:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3651 transitions. [2021-06-05 04:53:36,391 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3651 transitions. Word has length 22 [2021-06-05 04:53:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:36,391 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3651 transitions. [2021-06-05 04:53:36,391 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 04:53:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3651 transitions. [2021-06-05 04:53:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:36,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:36,392 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 04:53:36,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10999,826 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:36,593 INFO L430 AbstractCegarLoop]: === Iteration 827 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:36,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1498278754, now seen corresponding path program 798 times [2021-06-05 04:53:36,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:36,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872941138] [2021-06-05 04:53:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:36,710 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 04:53:36,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:36,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872941138] [2021-06-05 04:53:36,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872941138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:36,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754345080] [2021-06-05 04:53:36,711 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 04:53:36,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:36,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:36,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:36,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:37,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:37,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:37,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:37,069 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 12 treesize of output 8 [2021-06-05 04:53:37,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:37,135 INFO L628 ElimStorePlain]: treesize reduction 35, result has 69.8 percent of original size [2021-06-05 04:53:37,136 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1104 vanished before elimination [2021-06-05 04:53:37,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:37,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:37,139 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 13 treesize of output 9 [2021-06-05 04:53:37,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:37,142 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 6 treesize of output 4 [2021-06-05 04:53:37,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:37,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:37,171 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 04:53:37,171 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:142, output treesize:27 [2021-06-05 04:53:37,248 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 04:53:37,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754345080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:37,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:37,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:37,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855668676] [2021-06-05 04:53:37,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:37,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:37,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:37,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:37,249 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 04:53:37,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:37,609 INFO L93 Difference]: Finished difference Result 1514 states and 4939 transitions. [2021-06-05 04:53:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:37,609 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 04:53:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:37,611 INFO L225 Difference]: With dead ends: 1514 [2021-06-05 04:53:37,611 INFO L226 Difference]: Without dead ends: 1514 [2021-06-05 04:53:37,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 298.2ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-06-05 04:53:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1040. [2021-06-05 04:53:37,623 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 04:53:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3633 transitions. [2021-06-05 04:53:37,624 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3633 transitions. Word has length 22 [2021-06-05 04:53:37,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:37,624 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 3633 transitions. [2021-06-05 04:53:37,624 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 04:53:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3633 transitions. [2021-06-05 04:53:37,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:37,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:37,626 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 04:53:37,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11029,827 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:37,826 INFO L430 AbstractCegarLoop]: === Iteration 828 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:37,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:37,826 INFO L82 PathProgramCache]: Analyzing trace with hash 134772638, now seen corresponding path program 799 times [2021-06-05 04:53:37,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:37,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363903294] [2021-06-05 04:53:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:37,952 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 04:53:37,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:37,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363903294] [2021-06-05 04:53:37,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363903294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:37,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465240513] [2021-06-05 04:53:37,952 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 04:53:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:38,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:38,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:38,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:38,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:38,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:38,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:38,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:38,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:38,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:38,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:38,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:38,352 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 13 treesize of output 9 [2021-06-05 04:53:38,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:38,355 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 6 treesize of output 4 [2021-06-05 04:53:38,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:38,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:38,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:38,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:38,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:38,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:38,404 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:38,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:38,446 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 04:53:38,446 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:162, output treesize:29 [2021-06-05 04:53:38,547 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 04:53:38,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465240513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:38,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:38,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:38,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45373030] [2021-06-05 04:53:38,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:38,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:38,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:38,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:38,548 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 04:53:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:39,074 INFO L93 Difference]: Finished difference Result 1537 states and 5023 transitions. [2021-06-05 04:53:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:53:39,074 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 04:53:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:39,076 INFO L225 Difference]: With dead ends: 1537 [2021-06-05 04:53:39,076 INFO L226 Difference]: Without dead ends: 1537 [2021-06-05 04:53:39,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 448.9ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:53:39,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-06-05 04:53:39,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1043. [2021-06-05 04:53:39,088 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 04:53:39,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 3648 transitions. [2021-06-05 04:53:39,090 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 3648 transitions. Word has length 22 [2021-06-05 04:53:39,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:39,090 INFO L482 AbstractCegarLoop]: Abstraction has 1043 states and 3648 transitions. [2021-06-05 04:53:39,090 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 04:53:39,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 3648 transitions. [2021-06-05 04:53:39,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:39,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:39,091 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 04:53:39,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11066,828 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:39,291 INFO L430 AbstractCegarLoop]: === Iteration 829 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:39,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1822364318, now seen corresponding path program 800 times [2021-06-05 04:53:39,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:39,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415126643] [2021-06-05 04:53:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:39,416 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 04:53:39,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:39,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415126643] [2021-06-05 04:53:39,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415126643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:39,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163736205] [2021-06-05 04:53:39,416 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 04:53:39,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:39,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:39,760 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1121, v_prenex_1116], 1=[v_prenex_1119, v_prenex_1124, nondet_0]} [2021-06-05 04:53:39,764 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 6 treesize of output 4 [2021-06-05 04:53:39,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:39,860 INFO L628 ElimStorePlain]: treesize reduction 103, result has 49.5 percent of original size [2021-06-05 04:53:39,860 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1116 vanished before elimination [2021-06-05 04:53:39,861 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1119 vanished before elimination [2021-06-05 04:53:39,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:39,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:39,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:39,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:39,903 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 6 treesize of output 4 [2021-06-05 04:53:39,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:39,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:39,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:39,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:39,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:39,941 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 04:53:39,941 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 13 variables, input treesize:210, output treesize:27 [2021-06-05 04:53:40,036 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 04:53:40,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163736205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:40,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:40,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:40,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555069540] [2021-06-05 04:53:40,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:40,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:40,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:40,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:40,037 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 04:53:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:40,381 INFO L93 Difference]: Finished difference Result 1451 states and 4813 transitions. [2021-06-05 04:53:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:40,381 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 04:53:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:40,383 INFO L225 Difference]: With dead ends: 1451 [2021-06-05 04:53:40,383 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 04:53:40,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:40,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 04:53:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1034. [2021-06-05 04:53:40,394 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 04:53:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3609 transitions. [2021-06-05 04:53:40,396 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3609 transitions. Word has length 22 [2021-06-05 04:53:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:40,396 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3609 transitions. [2021-06-05 04:53:40,396 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 04:53:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3609 transitions. [2021-06-05 04:53:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:40,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:40,397 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 04:53:40,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11109,829 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:40,598 INFO L430 AbstractCegarLoop]: === Iteration 830 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:40,598 INFO L82 PathProgramCache]: Analyzing trace with hash -533414228, now seen corresponding path program 801 times [2021-06-05 04:53:40,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:40,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040925362] [2021-06-05 04:53:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:40,719 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 04:53:40,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:40,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040925362] [2021-06-05 04:53:40,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040925362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:40,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029249973] [2021-06-05 04:53:40,719 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 04:53:40,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:53:40,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:40,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 04:53:40,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:40,990 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1125, nondet_0], 1=[v_prenex_1127], 6=[v_prenex_1131]} [2021-06-05 04:53:40,994 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 6 treesize of output 4 [2021-06-05 04:53:40,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:41,076 INFO L628 ElimStorePlain]: treesize reduction 98, result has 50.5 percent of original size [2021-06-05 04:53:41,076 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:53:41,077 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1127 vanished before elimination [2021-06-05 04:53:41,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:41,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:41,080 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 14 treesize of output 8 [2021-06-05 04:53:41,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:41,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:41,083 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 15 treesize of output 9 [2021-06-05 04:53:41,084 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:41,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:41,116 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 04:53:41,116 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:204, output treesize:53 [2021-06-05 04:53:41,262 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 04:53:41,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029249973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:41,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:41,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:41,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223606156] [2021-06-05 04:53:41,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:41,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:41,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:41,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:41,263 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 04:53:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:41,848 INFO L93 Difference]: Finished difference Result 1615 states and 5211 transitions. [2021-06-05 04:53:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:53:41,848 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 04:53:41,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:41,850 INFO L225 Difference]: With dead ends: 1615 [2021-06-05 04:53:41,850 INFO L226 Difference]: Without dead ends: 1594 [2021-06-05 04:53:41,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 565.1ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:53:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-06-05 04:53:41,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1037. [2021-06-05 04:53:41,863 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 04:53:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3620 transitions. [2021-06-05 04:53:41,864 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3620 transitions. Word has length 22 [2021-06-05 04:53:41,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:41,864 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3620 transitions. [2021-06-05 04:53:41,864 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 04:53:41,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3620 transitions. [2021-06-05 04:53:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:41,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:41,866 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 04:53:42,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 830 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11145 [2021-06-05 04:53:42,067 INFO L430 AbstractCegarLoop]: === Iteration 831 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:42,067 INFO L82 PathProgramCache]: Analyzing trace with hash -2027321950, now seen corresponding path program 802 times [2021-06-05 04:53:42,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:42,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216884054] [2021-06-05 04:53:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:42,187 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 04:53:42,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:42,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216884054] [2021-06-05 04:53:42,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216884054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:42,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070459186] [2021-06-05 04:53:42,187 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 04:53:42,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:42,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:42,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:42,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:42,521 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 04:53:42,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:42,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:42,662 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-05 04:53:42,662 INFO L628 ElimStorePlain]: treesize reduction 73, result has 68.3 percent of original size [2021-06-05 04:53:42,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:42,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:42,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:42,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:42,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:42,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:42,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:42,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:42,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:42,797 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 13 treesize of output 9 [2021-06-05 04:53:42,798 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:42,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:42,852 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1144 vanished before elimination [2021-06-05 04:53:42,855 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 5 treesize of output 3 [2021-06-05 04:53:42,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:42,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:42,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:42,859 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:42,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:42,912 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 04:53:42,912 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 15 variables, input treesize:236, output treesize:29 [2021-06-05 04:53:43,005 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 04:53:43,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070459186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:43,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:43,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:43,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467996651] [2021-06-05 04:53:43,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:43,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:43,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:43,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:43,005 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 04:53:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:43,417 INFO L93 Difference]: Finished difference Result 1563 states and 5086 transitions. [2021-06-05 04:53:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:43,418 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 04:53:43,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:43,420 INFO L225 Difference]: With dead ends: 1563 [2021-06-05 04:53:43,420 INFO L226 Difference]: Without dead ends: 1557 [2021-06-05 04:53:43,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 394.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:43,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-06-05 04:53:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1038. [2021-06-05 04:53:43,432 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 04:53:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3629 transitions. [2021-06-05 04:53:43,434 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3629 transitions. Word has length 22 [2021-06-05 04:53:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:43,434 INFO L482 AbstractCegarLoop]: Abstraction has 1038 states and 3629 transitions. [2021-06-05 04:53:43,434 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 04:53:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3629 transitions. [2021-06-05 04:53:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:43,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:43,435 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 04:53:43,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 831 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11158 [2021-06-05 04:53:43,636 INFO L430 AbstractCegarLoop]: === Iteration 832 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash 217986210, now seen corresponding path program 803 times [2021-06-05 04:53:43,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:43,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669450291] [2021-06-05 04:53:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:43,760 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 04:53:43,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669450291] [2021-06-05 04:53:43,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669450291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235129306] [2021-06-05 04:53:43,760 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 04:53:43,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:53:43,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:43,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:43,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:44,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:44,106 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 15 treesize of output 1 [2021-06-05 04:53:44,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:44,176 INFO L628 ElimStorePlain]: treesize reduction 21, result has 80.7 percent of original size [2021-06-05 04:53:44,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:44,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:44,179 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 13 treesize of output 9 [2021-06-05 04:53:44,180 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:44,183 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 6 treesize of output 4 [2021-06-05 04:53:44,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:44,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:44,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:44,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:44,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:44,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:44,242 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 04:53:44,242 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:142, output treesize:27 [2021-06-05 04:53:44,336 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 04:53:44,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235129306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:44,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:44,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:44,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220643272] [2021-06-05 04:53:44,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:44,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:44,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:44,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:44,337 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 04:53:44,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:44,879 INFO L93 Difference]: Finished difference Result 1602 states and 5179 transitions. [2021-06-05 04:53:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:53:44,879 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 04:53:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:44,881 INFO L225 Difference]: With dead ends: 1602 [2021-06-05 04:53:44,881 INFO L226 Difference]: Without dead ends: 1602 [2021-06-05 04:53:44,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 492.4ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-06-05 04:53:44,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1037. [2021-06-05 04:53:44,894 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 04:53:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3624 transitions. [2021-06-05 04:53:44,895 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3624 transitions. Word has length 22 [2021-06-05 04:53:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:44,896 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3624 transitions. [2021-06-05 04:53:44,896 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 04:53:44,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3624 transitions. [2021-06-05 04:53:44,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:44,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:44,897 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 04:53:45,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11191,832 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:45,097 INFO L430 AbstractCegarLoop]: === Iteration 833 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:45,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:45,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1510328610, now seen corresponding path program 804 times [2021-06-05 04:53:45,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:45,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786717045] [2021-06-05 04:53:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:45,225 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 04:53:45,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:45,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786717045] [2021-06-05 04:53:45,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786717045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:45,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693273686] [2021-06-05 04:53:45,226 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 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 04:53:45,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:53:45,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:45,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:45,518 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1155, nondet_0], 3=[v_prenex_1153], 6=[v_prenex_1160]} [2021-06-05 04:53:45,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:45,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:45,620 INFO L628 ElimStorePlain]: treesize reduction 88, result has 57.7 percent of original size [2021-06-05 04:53:45,624 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 04:53:45,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:45,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:45,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:45,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:45,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:45,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:45,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:45,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:45,724 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 12 treesize of output 8 [2021-06-05 04:53:45,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:45,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:45,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:45,728 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:45,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:45,766 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 04:53:45,766 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 13 variables, input treesize:227, output treesize:38 [2021-06-05 04:53:45,866 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 04:53:45,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693273686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:45,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:45,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:45,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839565481] [2021-06-05 04:53:45,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:45,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:45,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:45,866 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 04:53:46,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:46,266 INFO L93 Difference]: Finished difference Result 1542 states and 5053 transitions. [2021-06-05 04:53:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:46,266 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 04:53:46,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:46,268 INFO L225 Difference]: With dead ends: 1542 [2021-06-05 04:53:46,268 INFO L226 Difference]: Without dead ends: 1542 [2021-06-05 04:53:46,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:46,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-06-05 04:53:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1034. [2021-06-05 04:53:46,281 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 04:53:46,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3609 transitions. [2021-06-05 04:53:46,282 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3609 transitions. Word has length 22 [2021-06-05 04:53:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:46,283 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3609 transitions. [2021-06-05 04:53:46,283 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 04:53:46,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3609 transitions. [2021-06-05 04:53:46,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:46,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:46,284 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 04:53:46,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11229,833 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:46,484 INFO L430 AbstractCegarLoop]: === Iteration 834 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:46,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:46,485 INFO L82 PathProgramCache]: Analyzing trace with hash 238722738, now seen corresponding path program 805 times [2021-06-05 04:53:46,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:46,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606614508] [2021-06-05 04:53:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:46,606 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 04:53:46,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:46,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606614508] [2021-06-05 04:53:46,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606614508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:46,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816011800] [2021-06-05 04:53:46,606 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 04:53:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:46,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:46,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:46,902 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1170, v_prenex_1166, v_prenex_1168], 6=[v_prenex_1173, nondet_0]} [2021-06-05 04:53:46,907 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 6 treesize of output 4 [2021-06-05 04:53:46,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:47,075 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 91 [2021-06-05 04:53:47,075 INFO L628 ElimStorePlain]: treesize reduction 41, result has 83.9 percent of original size [2021-06-05 04:53:47,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:47,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:47,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:47,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:47,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:47,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:47,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:47,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:47,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:47,253 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:47,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:47,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:47,257 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 04:53:47,258 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:47,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:47,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:47,262 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:47,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:47,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:47,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:47,342 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 12 treesize of output 8 [2021-06-05 04:53:47,343 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:47,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:47,347 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 13 treesize of output 9 [2021-06-05 04:53:47,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:47,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:47,420 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 04:53:47,420 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:261, output treesize:63 [2021-06-05 04:53:47,516 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 04:53:47,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816011800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:47,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:47,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:47,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778370566] [2021-06-05 04:53:47,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:47,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:47,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:47,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:47,516 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 04:53:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:47,970 INFO L93 Difference]: Finished difference Result 1496 states and 4904 transitions. [2021-06-05 04:53:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:53:47,971 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 04:53:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:47,973 INFO L225 Difference]: With dead ends: 1496 [2021-06-05 04:53:47,973 INFO L226 Difference]: Without dead ends: 1490 [2021-06-05 04:53:47,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:53:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2021-06-05 04:53:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1036. [2021-06-05 04:53:47,984 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 04:53:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3614 transitions. [2021-06-05 04:53:47,986 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3614 transitions. Word has length 22 [2021-06-05 04:53:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:47,986 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3614 transitions. [2021-06-05 04:53:47,986 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 04:53:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3614 transitions. [2021-06-05 04:53:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:47,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:47,987 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 04:53:48,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 834 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11246 [2021-06-05 04:53:48,188 INFO L430 AbstractCegarLoop]: === Iteration 835 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:48,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:48,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1676701188, now seen corresponding path program 806 times [2021-06-05 04:53:48,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:48,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839971808] [2021-06-05 04:53:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:48,326 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 04:53:48,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:48,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839971808] [2021-06-05 04:53:48,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839971808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:48,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301572524] [2021-06-05 04:53:48,326 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 04:53:48,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:48,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:48,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:48,627 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1176, v_prenex_1178], 3=[nondet_0], 6=[v_prenex_1183]} [2021-06-05 04:53:48,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 04:53:48,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,746 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-06-05 04:53:48,747 INFO L628 ElimStorePlain]: treesize reduction 107, result has 51.6 percent of original size [2021-06-05 04:53:48,747 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1178 vanished before elimination [2021-06-05 04:53:48,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:48,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:48,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:48,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:48,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:48,800 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 12 treesize of output 8 [2021-06-05 04:53:48,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:48,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:48,805 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:48,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:53:48,842 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 04:53:48,842 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 13 variables, input treesize:227, output treesize:38 [2021-06-05 04:53:48,935 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 04:53:48,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301572524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:48,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:48,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:48,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960445416] [2021-06-05 04:53:48,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:48,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:48,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:48,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:48,936 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 04:53:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:49,302 INFO L93 Difference]: Finished difference Result 1467 states and 4850 transitions. [2021-06-05 04:53:49,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:49,302 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 04:53:49,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:49,304 INFO L225 Difference]: With dead ends: 1467 [2021-06-05 04:53:49,304 INFO L226 Difference]: Without dead ends: 1467 [2021-06-05 04:53:49,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 379.1ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:49,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2021-06-05 04:53:49,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1034. [2021-06-05 04:53:49,315 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 04:53:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3609 transitions. [2021-06-05 04:53:49,317 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3609 transitions. Word has length 22 [2021-06-05 04:53:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:49,317 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3609 transitions. [2021-06-05 04:53:49,317 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 04:53:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3609 transitions. [2021-06-05 04:53:49,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:49,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:49,318 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 04:53:49,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11263,835 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:49,519 INFO L430 AbstractCegarLoop]: === Iteration 836 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:49,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:49,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1518664734, now seen corresponding path program 807 times [2021-06-05 04:53:49,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:49,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465444001] [2021-06-05 04:53:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:49,682 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 04:53:49,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:49,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465444001] [2021-06-05 04:53:49,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465444001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:49,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299591857] [2021-06-05 04:53:49,683 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 04:53:49,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:53:49,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:49,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:49,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:50,133 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 04:53:50,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299591857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:50,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:50,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:50,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105467566] [2021-06-05 04:53:50,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:50,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:50,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:50,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:50,134 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 04:53:50,548 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2021-06-05 04:53:50,784 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2021-06-05 04:53:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:50,863 INFO L93 Difference]: Finished difference Result 1308 states and 4337 transitions. [2021-06-05 04:53:50,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:50,863 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 04:53:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:50,865 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 04:53:50,865 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 04:53:50,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 765.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:53:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 04:53:50,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1040. [2021-06-05 04:53:50,875 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 04:53:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3631 transitions. [2021-06-05 04:53:50,877 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3631 transitions. Word has length 22 [2021-06-05 04:53:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:50,877 INFO L482 AbstractCegarLoop]: Abstraction has 1040 states and 3631 transitions. [2021-06-05 04:53:50,877 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 04:53:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3631 transitions. [2021-06-05 04:53:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:50,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:50,878 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 04:53:51,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11280,836 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:51,079 INFO L430 AbstractCegarLoop]: === Iteration 837 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:51,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:51,079 INFO L82 PathProgramCache]: Analyzing trace with hash 24757012, now seen corresponding path program 808 times [2021-06-05 04:53:51,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:51,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009518438] [2021-06-05 04:53:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:51,233 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 04:53:51,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:51,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009518438] [2021-06-05 04:53:51,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009518438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:51,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971407271] [2021-06-05 04:53:51,233 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 04:53:51,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:53:51,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:51,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:51,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:51,581 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-05 04:53:51,740 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 04:53:51,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971407271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:51,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:51,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:51,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290614154] [2021-06-05 04:53:51,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:51,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:51,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:51,741 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 04:53:52,152 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-06-05 04:53:52,393 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 81 [2021-06-05 04:53:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:52,484 INFO L93 Difference]: Finished difference Result 1314 states and 4344 transitions. [2021-06-05 04:53:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:52,484 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 04:53:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:52,486 INFO L225 Difference]: With dead ends: 1314 [2021-06-05 04:53:52,486 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 04:53:52,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 844.8ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 04:53:52,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1037. [2021-06-05 04:53:52,496 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 04:53:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3620 transitions. [2021-06-05 04:53:52,498 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3620 transitions. Word has length 22 [2021-06-05 04:53:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:52,498 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3620 transitions. [2021-06-05 04:53:52,498 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 04:53:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3620 transitions. [2021-06-05 04:53:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:52,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:52,499 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 04:53:52,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 837 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11298 [2021-06-05 04:53:52,700 INFO L430 AbstractCegarLoop]: === Iteration 838 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:52,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:52,700 INFO L82 PathProgramCache]: Analyzing trace with hash 562612590, now seen corresponding path program 809 times [2021-06-05 04:53:52,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:52,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870936090] [2021-06-05 04:53:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:52,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:52,861 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 04:53:52,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:52,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870936090] [2021-06-05 04:53:52,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870936090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:52,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004191725] [2021-06-05 04:53:52,861 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 04:53:53,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:53,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:53,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:53,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:53,352 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 04:53:53,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004191725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:53,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:53,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:53,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685229100] [2021-06-05 04:53:53,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:53,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:53,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:53,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:53,352 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 04:53:53,754 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 04:53:53,939 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 69 [2021-06-05 04:53:54,101 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 50 [2021-06-05 04:53:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:54,122 INFO L93 Difference]: Finished difference Result 1278 states and 4262 transitions. [2021-06-05 04:53:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:54,123 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 04:53:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:54,124 INFO L225 Difference]: With dead ends: 1278 [2021-06-05 04:53:54,124 INFO L226 Difference]: Without dead ends: 1266 [2021-06-05 04:53:54,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 839.9ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-06-05 04:53:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1034. [2021-06-05 04:53:54,134 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 04:53:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3609 transitions. [2021-06-05 04:53:54,136 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3609 transitions. Word has length 22 [2021-06-05 04:53:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:54,136 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3609 transitions. [2021-06-05 04:53:54,136 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 04:53:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3609 transitions. [2021-06-05 04:53:54,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:54,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:54,137 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 04:53:54,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 838 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11313 [2021-06-05 04:53:54,338 INFO L430 AbstractCegarLoop]: === Iteration 839 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:54,338 INFO L82 PathProgramCache]: Analyzing trace with hash -957725464, now seen corresponding path program 810 times [2021-06-05 04:53:54,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:54,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684520954] [2021-06-05 04:53:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:54,484 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 04:53:54,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:54,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684520954] [2021-06-05 04:53:54,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684520954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:54,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648001729] [2021-06-05 04:53:54,484 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 04:53:54,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:53:54,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:54,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:54,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:54,843 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-05 04:53:54,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:54,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:54,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:54,952 INFO L628 ElimStorePlain]: treesize reduction 117, result has 18.8 percent of original size [2021-06-05 04:53:54,952 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1204 vanished before elimination [2021-06-05 04:53:54,952 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:53:54,952 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 04:53:54,952 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 9 variables, input treesize:175, output treesize:27 [2021-06-05 04:53:55,018 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 04:53:55,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648001729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:55,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:55,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:55,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019994586] [2021-06-05 04:53:55,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:55,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:55,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:55,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:55,019 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 04:53:55,402 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 94 [2021-06-05 04:53:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:55,563 INFO L93 Difference]: Finished difference Result 1407 states and 4578 transitions. [2021-06-05 04:53:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:55,563 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 04:53:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:55,565 INFO L225 Difference]: With dead ends: 1407 [2021-06-05 04:53:55,565 INFO L226 Difference]: Without dead ends: 1407 [2021-06-05 04:53:55,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 623.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:55,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-06-05 04:53:55,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1037. [2021-06-05 04:53:55,577 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 04:53:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3620 transitions. [2021-06-05 04:53:55,578 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3620 transitions. Word has length 22 [2021-06-05 04:53:55,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:55,578 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3620 transitions. [2021-06-05 04:53:55,579 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 04:53:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3620 transitions. [2021-06-05 04:53:55,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:55,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:55,580 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 04:53:55,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11339,839 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:53:55,780 INFO L430 AbstractCegarLoop]: === Iteration 840 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:55,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:55,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1843334110, now seen corresponding path program 811 times [2021-06-05 04:53:55,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:55,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124948946] [2021-06-05 04:53:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:55,923 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 04:53:55,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:55,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124948946] [2021-06-05 04:53:55,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124948946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:55,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977446232] [2021-06-05 04:53:55,923 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 04:53:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:56,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:56,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:56,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:56,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:56,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:56,377 INFO L628 ElimStorePlain]: treesize reduction 54, result has 33.3 percent of original size [2021-06-05 04:53:56,377 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:53:56,384 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 04:53:56,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:111, output treesize:27 [2021-06-05 04:53:56,451 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 04:53:56,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977446232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:56,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:56,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:56,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418449783] [2021-06-05 04:53:56,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:56,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:56,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:56,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:56,452 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 04:53:56,861 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-05 04:53:57,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:57,025 INFO L93 Difference]: Finished difference Result 1412 states and 4583 transitions. [2021-06-05 04:53:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:53:57,025 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 04:53:57,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:57,027 INFO L225 Difference]: With dead ends: 1412 [2021-06-05 04:53:57,027 INFO L226 Difference]: Without dead ends: 1406 [2021-06-05 04:53:57,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 572.5ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:53:57,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2021-06-05 04:53:57,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1038. [2021-06-05 04:53:57,044 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 04:53:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3629 transitions. [2021-06-05 04:53:57,046 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3629 transitions. Word has length 22 [2021-06-05 04:53:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:57,046 INFO L482 AbstractCegarLoop]: Abstraction has 1038 states and 3629 transitions. [2021-06-05 04:53:57,046 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 04:53:57,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3629 transitions. [2021-06-05 04:53:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:57,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:57,047 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 04:53:57,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 840 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11353 [2021-06-05 04:53:57,248 INFO L430 AbstractCegarLoop]: === Iteration 841 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:57,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:57,248 INFO L82 PathProgramCache]: Analyzing trace with hash -206325026, now seen corresponding path program 812 times [2021-06-05 04:53:57,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:57,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634334119] [2021-06-05 04:53:57,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:57,415 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 04:53:57,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:57,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634334119] [2021-06-05 04:53:57,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634334119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:57,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144768713] [2021-06-05 04:53:57,415 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 04:53:57,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:53:57,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:57,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:57,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:53:57,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 04:53:57,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:57,792 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-06-05 04:53:57,792 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:53:57,793 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 04:53:57,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:99, output treesize:27 [2021-06-05 04:53:57,862 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 04:53:57,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144768713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:57,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:57,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-06-05 04:53:57,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946988432] [2021-06-05 04:53:57,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:53:57,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:57,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:53:57,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:53:57,863 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 04:53:58,261 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-06-05 04:53:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:53:58,547 INFO L93 Difference]: Finished difference Result 1394 states and 4539 transitions. [2021-06-05 04:53:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:53:58,547 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 04:53:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:53:58,549 INFO L225 Difference]: With dead ends: 1394 [2021-06-05 04:53:58,549 INFO L226 Difference]: Without dead ends: 1394 [2021-06-05 04:53:58,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 651.4ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:53:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-06-05 04:53:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1037. [2021-06-05 04:53:58,560 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 04:53:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 3624 transitions. [2021-06-05 04:53:58,562 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 3624 transitions. Word has length 22 [2021-06-05 04:53:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:53:58,562 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 3624 transitions. [2021-06-05 04:53:58,562 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 04:53:58,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 3624 transitions. [2021-06-05 04:53:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:53:58,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:53:58,563 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 04:53:58,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 841 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11388 [2021-06-05 04:53:58,763 INFO L430 AbstractCegarLoop]: === Iteration 842 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:53:58,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:53:58,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1086017374, now seen corresponding path program 813 times [2021-06-05 04:53:58,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:53:58,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360025919] [2021-06-05 04:53:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:53:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:53:58,914 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 04:53:58,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:53:58,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360025919] [2021-06-05 04:53:58,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360025919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:58,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809656306] [2021-06-05 04:53:58,914 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 04:53:59,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:53:59,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:53:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:53:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:53:59,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:53:59,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:53:59,472 INFO L628 ElimStorePlain]: treesize reduction 223, result has 10.8 percent of original size [2021-06-05 04:53:59,472 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1221 vanished before elimination [2021-06-05 04:53:59,472 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1224 vanished before elimination [2021-06-05 04:53:59,472 INFO L518 ElimStorePlain]: Eliminatee nondet_0 vanished before elimination [2021-06-05 04:53:59,472 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1217 vanished before elimination [2021-06-05 04:53:59,472 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1227 vanished before elimination [2021-06-05 04:53:59,473 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 04:53:59,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 18 variables, input treesize:281, output treesize:27 [2021-06-05 04:53:59,543 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 04:53:59,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809656306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:53:59,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:53:59,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-06-05 04:53:59,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097604833] [2021-06-05 04:53:59,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:53:59,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:53:59,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:53:59,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:53:59,544 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 04:53:59,930 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2021-06-05 04:54:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:54:00,072 INFO L93 Difference]: Finished difference Result 1340 states and 4432 transitions. [2021-06-05 04:54:00,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:54:00,073 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 04:54:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:54:00,074 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 04:54:00,074 INFO L226 Difference]: Without dead ends: 1340 [2021-06-05 04:54:00,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 591.7ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:54:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-06-05 04:54:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1034. [2021-06-05 04:54:00,085 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 04:54:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3609 transitions. [2021-06-05 04:54:00,087 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3609 transitions. Word has length 22 [2021-06-05 04:54:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:54:00,087 INFO L482 AbstractCegarLoop]: Abstraction has 1034 states and 3609 transitions. [2021-06-05 04:54:00,087 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 04:54:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3609 transitions. [2021-06-05 04:54:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:54:00,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:54:00,088 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 04:54:00,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11409,842 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:00,289 INFO L430 AbstractCegarLoop]: === Iteration 843 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:54:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:54:00,289 INFO L82 PathProgramCache]: Analyzing trace with hash -185588498, now seen corresponding path program 814 times [2021-06-05 04:54:00,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:54:00,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651615183] [2021-06-05 04:54:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:54:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:54:00,432 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 04:54:00,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:54:00,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651615183] [2021-06-05 04:54:00,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651615183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:54:00,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146694266] [2021-06-05 04:54:00,432 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 Received shutdown request... [2021-06-05 04:54:00,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:54:00,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:54:00,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:54:00,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:54:00,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11423,843 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:54:00,782 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:54:00,783 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:54:00,785 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:54:00,785 INFO L202 PluginConnector]: Adding new model name-comparator-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:54:00 BasicIcfg [2021-06-05 04:54:00,785 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:54:00,785 INFO L168 Benchmark]: Toolchain (without parser) took 891729.67 ms. Allocated memory was 354.4 MB in the beginning and 583.0 MB in the end (delta: 228.6 MB). Free memory was 333.2 MB in the beginning and 262.9 MB in the end (delta: 70.3 MB). Peak memory consumption was 299.5 MB. Max. memory is 16.0 GB. [2021-06-05 04:54:00,785 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 334.5 MB in the beginning and 334.4 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:54:00,785 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.27 ms. Allocated memory is still 354.4 MB. Free memory was 333.1 MB in the beginning and 331.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:54:00,786 INFO L168 Benchmark]: Boogie Preprocessor took 12.77 ms. Allocated memory is still 354.4 MB. Free memory was 331.6 MB in the beginning and 330.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:54:00,786 INFO L168 Benchmark]: RCFGBuilder took 408.00 ms. Allocated memory is still 354.4 MB. Free memory was 330.5 MB in the beginning and 325.2 MB in the end (delta: 5.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.0 GB. [2021-06-05 04:54:00,786 INFO L168 Benchmark]: TraceAbstraction took 891284.34 ms. Allocated memory was 354.4 MB in the beginning and 583.0 MB in the end (delta: 228.6 MB). Free memory was 325.2 MB in the beginning and 262.9 MB in the end (delta: 62.3 MB). Peak memory consumption was 290.9 MB. Max. memory is 16.0 GB. [2021-06-05 04:54:00,786 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 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 334.5 MB in the beginning and 334.4 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.27 ms. Allocated memory is still 354.4 MB. Free memory was 333.1 MB in the beginning and 331.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.77 ms. Allocated memory is still 354.4 MB. Free memory was 331.6 MB in the beginning and 330.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 408.00 ms. Allocated memory is still 354.4 MB. Free memory was 330.5 MB in the beginning and 325.2 MB in the end (delta: 5.2 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 891284.34 ms. Allocated memory was 354.4 MB in the beginning and 583.0 MB in the end (delta: 228.6 MB). Free memory was 325.2 MB in the beginning and 262.9 MB in the end (delta: 62.3 MB). Peak memory consumption was 290.9 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 QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - 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 QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - 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 QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - 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 QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - 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: 891195.6ms, OverallIterations: 843, TraceHistogramMax: 3, EmptinessCheckTime: 467.6ms, AutomataDifference: 391003.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 45671 SDtfs, 88270 SDslu, 280520 SDs, 0 SdLazy, 318424 SolverSat, 7237 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 121477.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30172 GetRequests, 14042 SyntacticMatches, 643 SemanticMatches, 15487 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48714 ImplicationChecksByTransitivity, 384207.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1052occurred in iteration=824, InterpolantAutomatonStates: 9299, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4886.0ms AutomataMinimizationTime, 842 MinimizatonAttempts, 192460 StatesRemovedByMinimization, 841 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4096.1ms SsaConstructionTime, 9345.2ms SatisfiabilityAnalysisTime, 245377.3ms InterpolantComputationTime, 34497 NumberOfCodeBlocks, 34491 NumberOfCodeBlocksAsserted, 2469 NumberOfCheckSat, 32814 ConstructedInterpolants, 1074 QuantifiedInterpolants, 331500 SizeOfPredicates, 7544 NumberOfNonLiveVariables, 79834 ConjunctsInSsa, 18189 ConjunctsInUnsatCore, 1683 InterpolantComputations, 3 PerfectInterpolantSequences, 2400/8718 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